• Getting Started
  • Installation
  • Usage
• Modules
  • Core
  • Operators
• Examples
  • Core
  • Operators

• Version: 2.0.32

• File: Utiliti.Js

• Author: Adeniji OluwaFeranmi

• Created: 27 November, 2022

• Update: 06 June, 2023

If you have any questions that are beyond the scope of this help file, Please feel free to email via Support Page.

UtilitiJs

UtilitiJs is a comprehensive JavaScript utility library that provides a collection of helpful functions for common tasks and operations. With UtilitiJs, developers can simplify their coding process and enhance productivity by leveraging the pre-built utility functions available in the library.

Key Features

UtilitiJs offers a wide range of features and functionalities, including:

1. Type Checking: UtilitiJs includes a typeCheck module that allows developers to perform type checks on various data types such as integers, strings, arrays, objects, functions, booleans, and NaN (not a number). This module provides functions like isInteger, isString, isArray, isObject, isFunction, isBoolean, and isNaN to perform type checks easily.

2. Value Checking: The valueCheck module in UtilitiJs provides functions to check various properties of numeric values. Developers can use functions like isPositive, isNegative, isZero, isEven, isOdd, isPrime, isWhole, and isFractional to check if a number is positive, negative, zero, even, odd, prime, whole, or fractional.

3. String Manipulation: UtilitiJs offers a string module that includes functions to manipulate and transform strings. Developers can utilize functions like capitalize, reverse, truncate, startsWith, endsWith, contains, replaceAll, and more to perform common string operations efficiently.

4. Array Manipulation: The array module in UtilitiJs provides functions for working with arrays. Developers can find functions like flatten, unique, shuffle, chunk, sortBy, unique, countOccurrences, and many others to simplify array manipulations and transformations.

5. Mathematical Operations: UtilitiJs includes a math module with functions for performing various mathematical operations. Developers can utilize functions like clamp, lerp, toDegrees, toRadians, roundTo, randomInt, sum, average, and more to perform common mathematical calculations.

6. Date and Time: UtilitiJs offers a date module with functions for working with dates and time. Developers can use functions like formatDate, isLeapYear, getDaysInMonth, addDays, subtractDays, compareDates, isPastDate, and more to handle date and time-related tasks effectively.

These are just a few highlights of the extensive set of features provided by the UtilitiJs library. By leveraging UtilitiJs, developers can streamline their development process, reduce boilerplate code, and enhance the efficiency of their JavaScript projects.

Installation

UtilitiJs can be easily installed via popular package managers like npm or yarn. Simply run the following command in your project directory:

npm install utiliti-js

or

yarn add utiliti-js

Once installed, you can import the desired modules and start using the utility functions in your JavaScript or TypeScript code.

Usage

Here's an example of how you can use UtilitiJs in your code:

import { typeCheck, valueCheck, string, array, math, Core } from 'utiliti-js';

const date = new Core.DateFilter();

console.log(typeCheck.isInteger(42)); // Output: true

console.log(valueCheck.isPositive(5)); // Output: true

console.log(string.capitalize('utilitijs')); // Output: Utilitijs

console.log(array.flatten([1, [2, [3, [4]]]])); // Output: [1, 2, 3, 4]

console.log(math.roundTo(3.14159, 2)); // Output

: 3.14

console.log(date.formatDate(new Date(), 'DD/MM/YYYY')); // Output: 05/06/2023

UtilitiJs provides an intuitive and consistent API, making it easy to integrate into your projects and accelerate your development process. Refer to the documentation for detailed information on all the available functions and their usage.

Modules

The Core module contains functions for making HTTP requests. It defines a Core object with methods for performing different operations like managing state, handling data etc. It also defines a Error() function for creating custom error objects that have a getInfo() method for retrieving information about the error. The UtilitiJs Library is intended to be used as a utility library in a JavaScript application. It also defined a Operators module that allows you to perform logical operations, check types, analyse data and do complex calculations.

Core

Core is an Object with loads of utility functions The first function, Http, contains methods for making different types of HTTP requests: get, post, put, and delete. The DataFilter function takes in a filter function and an array of data and returns an array of data that has been filtered according to the filter function. The DateFilter function contains functions for formatting dates as text or according to a specified format. Finally, the Store class is a basic implementation of a redux store, which is a state management tool for managing application state in JavaScript applications.

Operators

The Operators module is a set of JavaScript functions that defines a number of different logical, comparison, and value checking operations. It also includes some functions for checking the type of a value, as well as some statistical functions for calculating the sum, mean, median, and mode of an array of numbers. Some examples of the operations defined in this function are and, or, not, xor, nand, nor, implies, iff, equals, greaterThan, lessThan, and isPositive, isNaN, parseInt, parseFloat. These functions can be used to perform logical operations on values and compare them in different ways.

Documentation

Data Filter Class Documentation

The Data Filter class represents a data filter that can be used to filter an array of data based on a provided filter function. The class provides a filter method to apply the filter function to an array of data.

Usage

To use the Data Filter class, you can create an instance and provide a filter function:

const DataFilter = new DataFilter((item) => {
  // Filter logic here
  return item.age > 18;
});

Filtering Data

The filter method can be used to apply the filter function to an array of data:

filter(data: T[]): T[]

Example:

const data = [
  { name: 'John', age: 25 },
  { name: 'Jane', age: 16 },
  { name: 'Bob', age: 30 },
];

const filteredData = DataFilter.filter(data);
console.log(filteredData);
// Output: [{ name: 'John', age: 25 }, { name: 'Bob', age: 30 }]

Error Handling

The Data Filter class throws a Error if the filter function is not a valid function. Make sure to handle this error appropriately in your application.

Example Error Handling:

try {
  const filteredData = DataFilter.filter(data);
} catch (error) {
  if (error instanceof Error) {
    // Handle Error
  } else {
    // Handle other errors
  }
}

Conclusion

The Data Filter class provides a convenient way to filter an array of data based on a filter function. Use this class to simplify your data filtering operations and enhance the flexibility of your application.

HTTP Client Module Documentation

The HTTP Client module provides a simple and flexible way to make HTTP requests in JavaScript/TypeScript. It supports various HTTP methods like GET, POST, PUT, PATCH, and DELETE. The module also allows you to register interceptors for request/response handling.

Usage

To use the HTTP Client module in your TypeScript project, you can import the module and create an instance of the Http class.

import { Http } from 'utiliti-js';

const http = new Http();

Making HTTP Requests

The Http class provides methods for making different types of HTTP requests: get, post, put, patch, and delete. These methods return a promise that resolves to the response from the server.

GET Request

http.get(url: string, headers?: Object): Promise<Response>

Example:

http.get('https://api.example.com/users', { Authorization: 'Bearer token' })
  .then((response) => {
    // Handle the response
  })
  .catch((error) => {
    // Handle the error
  });

POST Request

http.post(url: string, data: any, headers?: Object): Promise<Response>

Example:

const user = {
  name: 'John Doe',
  email: '[email protected]',
};

http.post('https://api.example.com/users', user, { Authorization: 'Bearer token' })
  .then((response) => {
    // Handle the response
  })
  .catch((error) => {
    // Handle the error
  });

PUT Request

http.put(url: string, data: any, headers?: Object): Promise<Response>

Example:

const updatedUser = {
  name: 'John Smith',
  email: '[email protected]',
};

http.put('https://api.example.com/users/123', updatedUser, { Authorization: 'Bearer token' })
  .then((response) => {
    // Handle the response
  })
  .catch((error) => {
    // Handle the error
  });

PATCH Request

http.patch(url: string, data: any, headers?: Object): Promise<Response>

Example:

const updatedFields = {
  name: 'John Smith',
};

http.patch('https://api.example.com/users/123', updatedFields, { Authorization: 'Bearer token' })
  .then((response) => {
    // Handle the response
  })
  .catch((error) => {
    // Handle the error
  });

DELETE Request

http.delete(url: string, headers?: Object): Promise<Response>

Example:

http.delete('https://api.example.com/users/123', { Authorization: 'Bearer token' })
  .then((response) => {
    // Handle the response
  })
  .catch((error) => {
    // Handle the error
  });

Retrying a request

The Http class provides a retry feature that allows for automatic retries when an HTTP request fails. This feature is helpful for handling transient errors and improving the robustness of HTTP communication.

Retry Configuration

The retry feature in the Http class is configurable with the following options:

• retryDelay (number, default: 1000): The interval between a failed request and the next retry attempt in milliseconds. This value determines how long to wait before retrying the request after a failure.
• retryAttempt (number, default: 3): The number of times a request should be retried if it fails. This value determines the maximum number of retry attempts for each failed request.

By default, the retry delay is set to 1000 milliseconds (1 second), and the retry attempt is set to 3. You can customize these values when creating an instance of the Http class, as demonstrated in the example below.

Usage

To utilize the retry feature of the Http class, follow these steps:

1. Create an instance of the Http class with the desired retry configuration.

Example:

import { Http } from 'utiliti-js';

// Create an instance of the Http class with custom retry settings
const http = new Http({
  retryDelay: 2000, // Retry after 2 seconds on failure
  retryAttempt: 5,   // Retry up to 5 times on failure
});

2. Use the HTTP methods provided by the Http class (get, post, put, patch, delete) to send requests. The retry feature is applied automatically to all requests made through the Http class instance.

Example:

// Perform a GET request with automatic retries on failure
http.get('https://api.example.com/data')
  .then((response) => {
    // Handle the successful response
    console.log('Success:', response);
  })
  .catch((error) => {
    // Handle the error, including any retries if applicable
    console.error('Error:', error);
  });

The Http class will automatically retry the request if it encounters any network-related failures, such as a server timeout or connection issue. If the maximum number of retry attempts is reached and the request still fails, the final error will be thrown, and the catch block will be triggered with the corresponding error information.

Please note that the retry feature is especially useful for handling transient errors that might be resolved with subsequent retries. However, keep in mind that not all types of errors are eligible for retries, and careful consideration should be given to the specific use case and nature of the failure before enabling automatic retries.

Custom Interceptors and Retries

The retry feature works in conjunction with custom interceptors. Interceptors allow you to modify the request and response objects before and after each request. If you have added any interceptors using the addInterceptor or addScopedInterceptor methods, they will be applied during each retry attempt as well.

Make sure that any interceptors you add do not interfere with the retry process, as this could lead to unexpected behavior.

Handling Custom Errors

The Http class includes a custom error class named HttpRequestError, which is used to represent HTTP request-related errors. This custom error class extends the standard Error class and includes additional properties such as method, url, data, and headers, providing relevant information about the failed request.

When an HTTP request fails, the Http class will throw a HttpRequestError if any of the following conditions are met:

• The provided method, url, or header is not of the expected type (string or object, respectively).
• One of the interceptors is not a function.
• The maximum number of retry attempts (retryAttempt) is exceeded.

You can catch and handle HttpRequestError instances in your code to handle any potential request-related errors effectively.

Important Considerations

• The retry feature should be used judiciously, as excessive retries could cause additional load on servers and result in unexpected behavior for certain requests.
• Ensure that the retry delay and retry attempt values are set appropriately based on the nature of the requests and the server's capacity.
• Implement proper error handling and logging to track the success or failure of retry attempts and understand potential issues.

For more details on the usage of the Http class and other functionalities, refer to the main documentation or comments within the code.

Interceptors

Interceptors allow you to modify requests or responses globally or for specific requests. You can add interceptors using the useInterceptors and useScopedInterceptors methods.

Global Interceptors

Global interceptors apply to all requests made using the Http instance.

http.useInterceptors(interceptors: Function[]): void

Example:

function requestInterceptor(request: any, next: Function) {


  // Modify the request
  // ...

  // Call the next interceptor or send the request
  return next(request);
}

http.useInterceptors([requestInterceptor]);

Scoped Interceptors

Scoped interceptors apply to specific requests based on the method and URL.

http.useScopedInterceptors(interceptor: Function[]): void

Example:

function responseInterceptor(response: any, next: Function) {
  // Modify the response
  // ...

  // Call the next interceptor or return the response
  return next(response);
}

http.useScopedInterceptors([responseInterceptor], 'https://api.example.com/users/123', 'GET');

For more details on using interceptors and the Http class, refer to the documentation folder.

Core.Http Module Documentation (deprecated)

The Core.Http module provides methods for making HTTP requests to retrieve, create, update, and delete resources on a server. Please note that the use of Core.Http has been deprecated. It is recommended to use the Http module instead.

Usage

To use the HTTP module, you can create an instance:

import { Core } from "utiliti-js";
const http = new Core.Http();

Sending a GET Request

The get method sends a GET request to retrieve data from the server:

get(url: string, header: HeadersInit = {}): Promise<Response>

• url (string): The URL to send the GET request to.
• header (object): Optional. The headers to include in the request.

Example:

const response = await http.get("https://api.example.com/data", { Authorization: "Bearer token" });
const data = await response.json();
console.log(data);

Sending a POST Request

The post method sends a POST request to create a new resource on the server:

post(url: string, data: object, header: HeadersInit = {}): Promise<Response>

• url (string): The URL to send the POST request to.
• data (object): The data to include in the request body.
• header (object): Optional. The headers to include in the request.

Example:

const data = { name: "John Doe", email: "[email protected]" };
const response = await http.post("https://api.example.com/users", data, { Authorization: "Bearer token" });
const createdUser = await response.json();
console.log(createdUser);

Sending a PUT Request

The put method sends a PUT request to update an existing resource on the server:

put(url: string, data: object, header: HeadersInit = {}): Promise<Response>

• url (string): The URL to send the PUT request to.
• data (object): The data to include in the request body.
• header (object): Optional. The headers to include in the request.

Example:

const data = { name: "John Doe", email: "[email protected]" };
const response = await http.put("https://api.example.com/users/123", data, { Authorization: "Bearer token" });
const updatedUser = await response.json();
console.log(updatedUser);

Sending a PATCH Request

The patch method sends a PATCH request to update a resource on the server:

patch(url: string, data: object, header: HeadersInit = {}): Promise<Response>

• url (string): The URL to send the PATCH request to.
• data (object): The data to include in the request body.
• header (object): Optional. The headers to include in the request.

Example:

const data = { name: "John Doe", email: "[email protected]" };
const response = await http.patch("https://api.example.com/users/123", data, { Authorization: "Bearer token" });
const updatedUser = await response.json();
console.log(updatedUser);

Sending a DELETE Request

The delete method sends a DELETE request to delete a resource on the server:

delete(url: string, header: HeadersInit = {}): Promise<Response>

• url (string): The URL to send the DELETE request to.
• header (object): Optional. The headers to include in the request.

Example:

const response = await http.delete("https://api.example

.com/users/123", { Authorization: "Bearer token" });
console.log("Resource deleted");

Warning

The use of Core.Http has been deprecated. It is recommended to use the Http module instead. Please update your code to use the Http module for making HTTP requests.

Conclusion

The HTTP module provides convenient methods for making HTTP requests to retrieve, create, update, and delete resources on a server. Use this module to interact with APIs and handle data exchange in your application.

Core.DateFilter Class Documentation

The Date Filter class represents a date filter that provides methods for converting dates to text format and formatting dates based on specified formats. Please note that the DateFilter function has been renamed to DateFilter. Use the DateFilter class for date filtering operations.

Usage

To use the Date Filter class, you can create an instance:

const DateFilter = new DateFilter();

Converting Date to Text Format

The text method can be used to convert a date to text format:

text(date: Date): string

Example:

const date = new Date();
const formattedDate = DateFilter.text(date);
console.log(formattedDate);
// Output: "June 5, 2023"

Formatting Date

The formatDate method can be used to format a date based on a specified format:

formatDate(date: Date, format: string): string

Supported format specifiers:

• yyyy - Year
• mm - Month (padded with leading zeros)
• dd - Day (padded with leading zeros)
• HH - Hour (padded with leading zeros)
• MM - Minute (padded with leading zeros)
• SS - Second (padded with leading zeros)
• ago - Time elapsed since the date (e.g., "2 days ago")

Example:

const date = new Date();
const formattedDate = DateFilter.formatDate(date, "yyyy-mm-dd HH:MM:SS");
console.log(formattedDate);
// Output: "2023-06-05 12:30:45"

const date = new Date();
const formattedDate = DateFilter.formatDate(date, "ago");
console.log(formattedDate);
// Output: "xx day(s) or xx hour(s) ago"

Warning

The DateFilter function has been renamed to DateFilter. Please update your code to use the DateFilter class instead. The previous function will still work but is deprecated.

Conclusion

The Date Filter class provides convenient methods for converting dates to text format and formatting dates based on specified formats. Use this class to enhance the date manipulation capabilities of your application.

Core.Store Class Documentation

The Store class represents a store that holds the state and manages state updates. It is now implemented as a class or constructor.

Usage

To create a store, instantiate the Store class:

const store = new Store(reducer, initialState);

• reducer (function): The reducer function for state updates.
• initialState (optional): The initial state of the store. Default is an empty object ({}).

Getting the Current State

The getState method returns the current state of the store:

getState(): T

Example:

const currentState = store.getState();
console.log(currentState);

Dispatching an Action

The dispatch method dispatches an action to update the state:

dispatch(action: A): void

• action (A): The action object representing the state update.

Example:

const action = { type: "INCREMENT" };
store.dispatch(action);

Subscribing to Store Updates

The subscribe method subscribes a listener function to be called on state changes:

subscribe(listener: Function): Function

• listener (function): The listener function to be called on state changes.

Example:

const listener = (state) => {
  console.log("State changed:", state);
};

const unsubscribe = store.subscribe(listener);

// To unsubscribe:
unsubscribe();

Replacing the Reducer

The replaceReducer method replaces the current reducer function with a new one:

replaceReducer(nextReducer: (state: T, action: A) => T): void

• nextReducer (function): The new reducer function.

Example:

const newReducer = (state, action) => {
  // Custom reducer logic...
  return newState;
};

store.replaceReducer(newReducer);

Getting the Current Reducer

The getReducer method returns the current reducer function:

getReducer(): (state: T, action: A) => T

Example:

const currentReducer = store.getReducer();
console.log(currentReducer);

Middleware

To apply middlewares to the store's dispatch function, you can use the applyMiddleware function:

applyMiddleware(...middlewares: Function[]): (store: any) => (...args: any[]) => any

• middlewares (functions): The middlewares to apply.

Example:

const enhancedStore = applyMiddleware(middleware1, middleware2)(Store);
const store = enhancedStore(reducer, initialState);

Subscriber

To create a subscriber object that can subscribe to store updates, you can use the createSubscriber function:

const subscriber = createSubscriber(store);

• store (any): The store object to subscribe to.

The subscriber object has a subscribe method that can be used to subscribe a callback function to store updates:

subscriber.subscribe(callback: Function)

• callback (function): The callback function to be called on store updates.

Merging Reducers

To merge multiple reducers into a single reducer function, you can use the mergeReducers function:

mergeReducers(reducers: { [key: string]: Function }): (state: any, action: any) => any

• reducers (object): An object containing the individual reducers.

Example:

const reducer = mergeReducers({
  reducer1,
  reducer2,
});

Please note that the Store class is now a constructor or class and should be instantiated using the new keyword. Additionally, the Store class no longer throws an error if the reducer is not a function but instead throws a Error. Make sure to handle the Error appropriately in your code.

Core.TaskQueue Class Documentation

The TaskQueue class is responsible for creating and managing a queue of tasks.

Usage

To create a task queue, instantiate the TaskQueue class:

const taskQueue = new TaskQueue();

Adding a Task

The addTask method adds a new task to the queue:

addTask(task: Function): void

• task (function): The task to add to the queue.

Example:

const task = () => {
  // Task logic...
};

taskQueue.addTask(task);

Running Tasks

The runTasks method executes all tasks in the queue:

runTasks(): void

Example:

taskQueue.runTasks();

Clearing the Queue

The clearTasks method clears the queue:

clearTasks(): void

Example:

taskQueue.clearTasks();

Getting the Task Count

The getTaskCount method returns the number of tasks in the queue:

getTaskCount(): number

Example:

const count = taskQueue.getTaskCount();
console.log(count);

Error Handling

The runTasks method throws a Error if a task is not a function. You should handle this error appropriately in your code.

Utility Function

The generateId function generates a unique ID of a random length:

generateId(): number

Example:

const id = generateId();
console.log(id);

Please note that the TaskQueue class is now a class and should be instantiated using the new keyword.

Core.UrlParser Class Documentation

The UrlParser class is responsible for parsing and manipulating URLs.

Usage

To create an instance of UrlParser, instantiate the class with a URL:

const urlParser = new UrlParser(url);

• url (string): The URL to parse and manipulate.

Getting the URL Path

The getPath method returns the path of the URL:

getPath(): string

Example:

const path = urlParser.getPath();
console.log(path); // Expected output: The URL path (e.g., "/products")

Getting the Query String

The getQueryString method returns the query string of the URL:

getQueryString(): string

Example:

const queryString = urlParser.getQueryString();
console.log(queryString); // Expected output: The query string (e.g., "?category=electronics&sort=price")

Getting a Specific Query Parameter

The getQueryParameter method returns the value of a specific query parameter:

getQueryParameter(param: string): string | null

• param (string): The query parameter to retrieve.

Example:

const value = urlParser.getQueryParameter('category');
console.log(value); // Expected output: The value of the query parameter or null if not found

Building a URL

The buildUrl method builds a URL from its components:

buildUrl(
  protocol: string,
  hostname: string,
  path: string,
  queryParams: { [key: string]: string }
): string

• protocol (string): The URL protocol.
• hostname (string): The URL hostname.
• path (string): The URL path.
• queryParams (object): The query parameters.

Example:

const protocol = 'https';
const hostname = 'example.com';
const path = '/api';
const queryParams = {
  key1: 'value1',
  key2: 'value2'
};

const builtUrl = urlParser.buildUrl(protocol, hostname, path, queryParams);
console.log(builtUrl); // Expected output: The built URL as a string (e.g., "https://example.com/api?key1=value1&key2=value2")

Core.Random Class Documentation

The Random class is responsible for generating random numbers or strings.

Usage

To use the Random class, create an instance of it:

const random = new Random();

Generating a Random Number

The number method generates a random number within a specified range:

number(min: number, max: number): number

• min (number): The minimum value.
• max (number): The maximum value.

Example:

const randomNumber = random.number(1, 100);
console.log(randomNumber); // Expected output: The generated random number within the specified range

Generating a Random String

The string method generates a random string with a specified length:

string(length: number): string

• length (number): The length of the random string.

Example:

const randomString = random.string(8);
console.log(randomString); // Expected output: The generated random string with the specified length

Please note that the Random

class is now a class and should be instantiated using the new keyword.

Core.DataValidator Class Documentation

The DataValidator class is responsible for validating data.

Usage

To use the DataValidator class, create an instance of it:

const validator = new DataValidator();

Checking if a Value is Within a Range

The inRange method checks if a value is within a certain range:

inRange(value: number, min: number, max: number): boolean

• value (number): The value to check.
• min (number): The minimum value of the range.
• max (number): The maximum value of the range.

Example:

const value = 5;
const isInRange = validator.inRange(value, 1, 10);
console.log(isInRange); // Expected output: true if the value is within the range, false otherwise

Checking if a String Matches a Format

The matchFormat method checks if a string matches a certain format:

matchFormat(str: string, regex: RegExp): boolean

• str (string): The string to check.
• regex (RegExp): The regular expression to match against.

Example:

const str = "abc123";
const regex = /^[a-z]+$/;
const matchesFormat = validator.matchFormat(str, regex);
console.log(matchesFormat); // Expected output: true if the string matches the format, false otherwise

Checking if a String has a Certain Length

The hasLength method checks if a string has a certain length:

hasLength(str: string, length: number): boolean

• str (string): The string to check.
• length (number): The required length of the string.

Example:

const str = "Hello";
const requiredLength = 5;
const hasRequiredLength = validator.hasLength(str, requiredLength);
console.log(hasRequiredLength); // Expected output: true if the string has the specified length, false otherwise

Helper Function: trim

The trim function trims leading and trailing whitespace from a string.

Usage:

const trimmedStr = trim(str);

• str (string): The string to trim.

Example:

const str = "   Hello, World!   ";
const trimmedStr = trim(str);
console.log(trimmedStr); // Expected output: "Hello, World!" (leading and trailing whitespace removed)

Please note that the DataValidator class and trim function should be instantiated or used directly respectively.

Operators

Array Module

The array module provides utility functions for working with arrays.

Importing the Module

To use the array module, you can import it into your JavaScript code using the following syntax:

import * as arrayUtil from 'utiliti-js/Operators/array';
// Or:
import { array } from 'utiliti-js';

Functions

The array module provides the following functions:

sum(array)

Calculates the sum of all numbers in the given array.

• array: An array of numbers.
• Returns: The sum of all numbers in the array.

Example:

import { sum } from 'utiliti-js/Operators/array';

const numbers = [1, 2, 3, 4, 5];
const sumResult = sum(numbers);
console.log(sumResult); // Output: 15

filter(array, predicate)

Filters the elements of the given array based on a provided predicate function.

• array: An array to be filtered.
• predicate: A function that takes an element as an argument and returns true or false to indicate whether the element should be included in the filtered result.
• Returns: A new array containing only the elements that satisfy the predicate.

Example:

import { filter } from 'utiliti-js/Operators/array';

const numbers = [1, 2, 3, 4, 5];
const evenNumbers = filter(numbers, (num) => num % 2 === 0);
console.log(evenNumbers); // Output: [2, 4]

map(array, mapper)

Applies a mapping function to each element of the given array and returns a new array with the results.

• array: An array to be mapped.
• mapper: A function that takes an element as an argument and returns the transformed value.
• Returns: A new array with the transformed elements.

Example:

import { map } from 'utiliti-js/Operators/array';

const numbers = [1, 2, 3, 4, 5];
const squaredNumbers = map(numbers, (num) => num * num);
console.log(squaredNumbers); // Output: [1, 4, 9, 16, 25]

reduce(array, reducer, initialValue)

Reduces the elements of the given array to a single value using a reducer function.

• array: An array to be reduced.
• reducer: A function that takes an accumulator and the current element as arguments and returns the updated accumulator value.
• initialValue: An optional initial value for the accumulator.
• Returns: The final value of the accumulator.

Example:

import { reduce } from 'utiliti-js/Operators/array';

const numbers = [1, 2, 3, 4, 5];
const sum = reduce(numbers, (accumulator, currentValue) => accumulator + currentValue, 0);
console.log(sum); // Output: 15

flatten(array)

Flattens a nested array structure into a single-level array.

• array: A nested array to be flattened.
• Returns: A new array with all elements flattened.

Example:

import { flatten } from 'utiliti-js/Operators/array';

const nestedArray = [1, [2, [3, [4, 5]]]];
const flattenedArray = flatten(nestedArray);
console.log(flattenedArray); // Output: [1, 2, 3, 4, 5]

These are the available

functions provided by the array module in the utiliti-js library. You can import the module as shown above and utilize these functions in your JavaScript code.

Compare Module

The compare module provides functions for comparing values and performing equality checks.

Importing the Module

To use the compare module, you can import it into your TypeScript code using either of the following syntaxes:

import { compare } from 'utiliti-js';

or

import * as compare  from 'utiliti-js/Operators/compare';

Functions

The compare module provides the following functions:

equals(a, b)

Checks if two values are equal.

• a: The first value.
• b: The second value.
• Returns: true if the values are equal, false otherwise.

Example:

import { compare } from 'utiliti-js';

const result = compare.equals(5, 5);
console.log(result); // Output: true

greaterThan(a, b)

Checks if the first value is greater than the second value.

• a: The first value.
• b: The second value.
• Returns: true if the first value is greater than the second value, false otherwise.

Example:

import { compare } from 'utiliti-js';

const result = compare.greaterThan(10, 5);
console.log(result); // Output: true

lessThan(a, b)

Checks if the first value is less than the second value.

• a: The first value.
• b: The second value.
• Returns: true if the first value is less than the second value, false otherwise.

Example:

import { compare } from 'utiliti-js';

const result = compare.lessThan(5, 10);
console.log(result); // Output: true

deepEqual(obj1, obj2)

Performs a deep equality check between two objects or arrays.

• obj1: The first object or array.
• obj2: The second object or array.
• Returns: true if the objects or arrays are deeply equal, false otherwise.

Example:

import { compare } from 'utiliti-js';

const obj1 = { a: 1, b: { c: 2 } };
const obj2 = { a: 1, b: { c: 2 } };
const result = compare.deepEqual(obj1, obj2);
console.log(result); // Output: true

These are the available functions provided by the compare module in the utiliti-js library. You can import the module as shown above and utilize these functions in your TypeScript code.

Logic Module

The logic module provides utility functions for logical operations.

Importing the Module

To use the logic module, you can import it into your TypeScript code using either of the following syntaxes:

import { logic } from 'utiliti-js/Operators/logic';

or

import * as logic from 'utiliti-js/Operators/logic';

Functions

The logic module provides the following functions:

and(...conditions: any[]): boolean

Returns true if all the conditions are truthy values, false otherwise.

• ...conditions: The conditions to be evaluated.
• Returns: true if all conditions are truthy values, false otherwise.

Example:

import { logic } from 'utiliti-js/Operators/logic';

const result = logic.and(true, 5 > 3, 'Hello');
console.log(result); // Output: true

or(...conditions: any[]): boolean

Returns true if any of the conditions are truthy values, false otherwise.

• ...conditions: The conditions to be evaluated.
• Returns: true if any condition is a truthy value, false otherwise.

Example:

import { logic } from 'utiliti-js/Operators/logic';

const result = logic.or(false, 5 < 3, '');
console.log(result); // Output: true

not(condition: any): boolean

Returns the boolean negation of the condition.

• condition: The condition to be negated.
• Returns: The boolean negation of the condition.

Example:

import { logic } from 'utiliti-js/Operators/logic';

const result = logic.not(true);
console.log(result); // Output: false

xor(...conditions: any[]): boolean

Returns true if an odd number of the conditions are truthy values, false otherwise.

• ...conditions: The conditions to be evaluated.
• Returns: true if an odd number of conditions are truthy values, false otherwise.

Example:

import { logic } from 'utiliti-js/Operators/logic';

const result = logic.xor(true, false, true);
console.log(result); // Output: true

nand(...conditions: any[]): boolean

Returns true if any of the conditions are falsy values, false otherwise.

• ...conditions: The conditions to be evaluated.
• Returns: true if any condition is a falsy value, false otherwise.

Example:

import { logic } from 'utiliti-js/Operators/logic';

const result = logic.nand(true, false, true);
console.log(result); // Output: false

nor(...conditions: any[]): boolean

Returns true if all of the conditions are falsy values, false otherwise.

• ...conditions: The conditions to be evaluated.
• Returns: true if all conditions are falsy values, false otherwise.

Example:

import { logic } from 'utiliti-js/Operators/logic';

const result = logic.nor(false, '', null);
console.log(result); // Output: true

implies(a: any, b: any): boolean

Returns the value of a logical implication (a -> b).

• a: The antecedent of the implication.
• b: The consequent of the implication.
• Returns: The truth value of the implication.

Example:

import { logic } from 'utiliti-js/Operators/logic';



const result = logic.implies(true, false);
console.log(result); // Output: false

iff(a: any, b: any): boolean

Returns the value of a biconditional implication (a <-> b).

• a: The first proposition of the biconditional.
• b: The second proposition of the biconditional.
• Returns: The truth value of the biconditional.

Example:

import { logic } from 'utiliti-js/Operators/logic';

const result = logic.iff(true, false);
console.log(result); // Output: false

These are the available functions provided by the logic module in the utiliti-js library. You can import the module as shown above and utilize these functions in your code.

Object Module

The object module provides utility functions for working with objects.

Importing the Module

To use the object module, you can import it into your TypeScript code using the following import style:

import { object } from 'utiliti-js';

Functions

The object module provides the following functions:

getProperty(object: object, key: string): any

Returns the value at the specified key in the object.

• object: The object to retrieve the value from.
• key: The key to retrieve the value for.
• Returns: The value at the specified key in the object.

Example:

import { object } from 'utiliti-js';

const obj = { name: 'John', age: 30 };
const value = object.getProperty(obj, 'name');
console.log(value); // Output: John

setProperty(object: object, key: string, value: any): void

Sets the value at the specified key in the object.

• object: The object to set the value in.
• key: The key to set the value for.
• value: The value to set.

Example:

import { object } from 'utiliti-js';

const obj = { name: 'John', age: 30 };
object.setProperty(obj, 'age', 35);
console.log(obj); // Output: { name: 'John', age: 35 }

hasProperty(object: object, key: string): boolean

Returns a boolean indicating whether the object has a property with the specified key.

• object: The object to check for the property.
• key: The key to check for.
• Returns: Whether the object has the specified key.

Example:

import { object } from 'utiliti-js';

const obj = { name: 'John', age: 30 };
const hasName = object.hasProperty(obj, 'name');
console.log(hasName); // Output: true

const hasEmail = object.hasProperty(obj, 'email');
console.log(hasEmail); // Output: false

getKeys(object: object): string[]

Returns an array of the object's own enumerable property names.

• object: The object to get the keys for.
• Returns: An array of the object's own enumerable property names.

Example:

import { object } from 'utiliti-js';

const obj = { name: 'John', age: 30 };
const keys = object.getKeys(obj);
console.log(keys); // Output: ['name', 'age']

getValues(object: object): any[]

Returns an array of the object's own enumerable property values.

• object: The object to get the values for.
• Returns: An array of the object's own enumerable property values.

Example:

import { object } from 'utiliti-js';

const obj = { name: 'John', age: 30 };
const values = object.getValues(obj);
console.log(values); // Output: ['John', 30]

getEntries(object: object): [string, any][]

Returns an array of the object's own enumerable property [key, value] pairs.

• object: The object to get the entries for.
• Returns: An array of the object's own enumerable property [key, value] pairs.

Example:

import { object } from 'utiliti-js';

const obj = { name: 'John', age: 30 };
const entries = object.getEntries(obj);
console.log(entries); // Output

: [['name', 'John'], ['age', 30]]

extendObject(object: object, ...sources: object[]): object

Copies the own enumerable properties of source objects to the target object and returns the target object.

• object: The target object to extend.
• sources: The source objects to copy properties from.
• Returns: The extended target object.

Example:

import { object } from 'utiliti-js';

const target = { name: 'John' };
const source = { age: 30 };
const extended = object.extendObject(target, source);
console.log(extended); // Output: { name: 'John', age: 30 }

cloneShallow(object: object): object

Creates a shallow copy of the object.

• object: The object to clone.
• Returns: A shallow copy of the object.

Example:

import { object } from 'utiliti-js';

const obj = { name: 'John', age: 30 };
const clone = object.cloneShallow(obj);
console.log(clone); // Output: { name: 'John', age: 30 }

cloneDeep(object: object): object

Creates a deep copy of the object.

• object: The object to clone.
• Returns: A deep copy of the object.

Example:

import { object } from 'utiliti-js';

const obj = { name: 'John', age: 30 };
const clone = object.cloneDeep(obj);
console.log(clone); // Output: { name: 'John', age: 30 }

forEachProperty(object: object, callback: (value: any, key: string, object: object) => void): void

Calls the callback function for each own enumerable property of the object.

• object: The object to iterate over.
• callback: The function to call for each property.

The callback function receives the following parameters:

• value: The value of the current property.
• key: The key of the current property.
• object: The object being iterated over.

Example:

import { object } from 'utiliti-js';

const obj = { name: 'John', age: 30 };
object.forEachProperty(obj, (value, key) => {
  console.log(`${key}: ${value}`);
});
// Output:
// name: John
// age: 30

mapProperties(object: object, callback: (value: any, key: string, object: object) => any): object

Calls the callback function for each own enumerable property of the object and returns a new object with the returned values.

• object: The object to iterate over.
• callback: The function to call for each property.

The callback function receives the following parameters:

• value: The value of the current property.
• key: The key of the current property.
• object: The object being iterated over.

Returns: A new object with the returned values.

Example:

import { object } from 'utiliti-js';

const obj = { name: 'John', age: 30 };
const mapped = object.mapProperties(obj, (value, key) => {
  return `${key}: ${value}`;
});
console.log(mapped); // Output: { name: 'name: John', age: 'age: 30' }

filterProperties(object: object, callback: (value: any, key: string, object: object) => boolean): object

Calls the callback function for each own enumerable property of the object and returns

a new object with the properties for which the callback returned a truthy value.

• object: The object to iterate over.
• callback: The function to call for each property.

The callback function receives the following parameters:

• value: The value of the current property.
• key: The key of the current property.
• object: The object being iterated over.

Returns: A new object with the properties for which the callback returned a truthy value.

Example:

import { object } from 'utiliti-js';

const obj = { name: 'John', age: 30 };
const filtered = object.filterProperties(obj, (value, key) => {
  return typeof value === 'string';
});
console.log(filtered); // Output: { name: 'John' }

That covers the functions provided by the object module. You can now use these functions in your TypeScript code to work with objects more efficiently.

TypeCheck Module

The typeCheck module provides utility functions to perform type checks on values.

Functions

isInteger(num: any): boolean

Checks if a value is an integer.

• num: The value to check.
• Returns: true if the value is an integer, false otherwise.

Example:

import { typeCheck } from 'utiliti-js';

console.log(typeCheck.isInteger(5)); // Output: true
console.log(typeCheck.isInteger(5.5)); // Output: false

isString(val: any): boolean

Checks if a value is a string.

• val: The value to check.
• Returns: true if the value is a string, false otherwise.

Example:

import { typeCheck } from 'utiliti-js';

console.log(typeCheck.isString('hello')); // Output: true
console.log(typeCheck.isString(123)); // Output: false

isArray(val: any): boolean

Checks if a value is an array.

• val: The value to check.
• Returns: true if the value is an array, false otherwise.

Example:

import { typeCheck } from 'utiliti-js';

console.log(typeCheck.isArray([1, 2, 3])); // Output: true
console.log(typeCheck.isArray('hello')); // Output: false

isObject(val: any): boolean

Checks if a value is an object.

• val: The value to check.
• Returns: true if the value is an object, false otherwise.

Example:

import { typeCheck } from 'utiliti-js';

console.log(typeCheck.isObject({ name: 'John' })); // Output: true
console.log(typeCheck.isObject('hello')); // Output: false

isFunction(val: any): boolean

Checks if a value is a function.

• val: The value to check.
• Returns: true if the value is a function, false otherwise.

Example:

import { typeCheck } from 'utiliti-js';

console.log(typeCheck.isFunction(() => {})); // Output: true
console.log(typeCheck.isFunction(123)); // Output: false

isBoolean(val: any): boolean

Checks if a value is a boolean.

• val: The value to check.
• Returns: true if the value is a boolean, false otherwise.

Example:

import { typeCheck } from 'utiliti-js';

console.log(typeCheck.isBoolean(true)); // Output: true
console.log(typeCheck.isBoolean('false')); // Output: false

isNaN(value: any): boolean

Checks if a value is NaN (not a number).

• value: The value to check.
• Returns: true if the value is NaN, false otherwise.

Example:

import { typeCheck } from 'utiliti-js';

console.log(typeCheck.isNaN(NaN)); // Output: true
console.log(typeCheck.isNaN(5)); // Output: false

parseInt(str: string, radix?: number): number

Converts a string to an integer.

• str: The string to convert.
• radix (optional): The radix used for parsing. Defaults to 10 if not specified.
• Returns: The parsed integer value.

**Example:

**

import { typeCheck } from 'utiliti-js';

console.log(typeCheck.parseInt('10')); // Output: 10
console.log(typeCheck.parseInt('101', 2)); // Output: 5

parseFloat(str: string): number

Converts a string to a floating-point number.

• str: The string to convert.
• Returns: The parsed floating-point number value.

Example:

import { typeCheck } from 'utiliti-js';

console.log(typeCheck.parseFloat('3.14')); // Output: 3.14
console.log(typeCheck.parseFloat('2.99')); // Output: 2.99

That covers the functions provided by the typeCheck module. You can now use these functions in your TypeScript code to perform type checks and conversions.

ValueCheck Module

The valueCheck module provides utility functions to perform checks on numeric values.

Functions

isPositive(num: number): boolean

Checks if a number is positive.

• num: The number to check.
• Returns: true if the number is positive, false otherwise.

Example:

import { valueCheck } from 'utiliti-js';

console.log(valueCheck.isPositive(5)); // Output: true
console.log(valueCheck.isPositive(-5)); // Output: false

isNegative(num: number): boolean

Checks if a number is negative.

• num: The number to check.
• Returns: true if the number is negative, false otherwise.

Example:

import { valueCheck } from 'utiliti-js';

console.log(valueCheck.isNegative(-5)); // Output: true
console.log(valueCheck.isNegative(5)); // Output: false

isZero(num: number): boolean

Checks if a number is zero.

• num: The number to check.
• Returns: true if the number is zero, false otherwise.

Example:

import { valueCheck } from 'utiliti-js';

console.log(valueCheck.isZero(0)); // Output: true
console.log(valueCheck.isZero(5)); // Output: false

isEven(num: number): boolean

Checks if a number is even.

• num: The number to check.
• Returns: true if the number is even, false otherwise.

Example:

import { valueCheck } from 'utiliti-js';

console.log(valueCheck.isEven(4)); // Output: true
console.log(valueCheck.isEven(5)); // Output: false

isOdd(num: number): boolean

Checks if a number is odd.

• num: The number to check.
• Returns: true if the number is odd, false otherwise.

Example:

import { valueCheck } from 'utiliti-js';

console.log(valueCheck.isOdd(3)); // Output: true
console.log(valueCheck.isOdd(4)); // Output: false

isPrime(num: number): boolean

Checks if a number is prime.

• num: The number to check.
• Returns: true if the number is prime, false otherwise.

Example:

import { valueCheck } from 'utiliti-js';

console.log(valueCheck.isPrime(7)); // Output: true
console.log(valueCheck.isPrime(8)); // Output: false

isWhole(num: number): boolean

Checks if a number is a whole number.

• num: The number to check.
• Returns: true if the number is a whole number, false otherwise.

Example:

import { valueCheck } from 'utiliti-js';

console.log(valueCheck.isWhole(4)); // Output: true
console.log(valueCheck.isWhole(4.5)); // Output: false

isFractional(num: number): boolean

Checks if a number is a fractional number.

• num: The number to check.
• Returns: true if the number is a fractional number, false otherwise.

Example:

import { valueCheck } from 'utiliti-js';

console.log(valueCheck.isFractional(4.5)); // Output

: true
console.log(valueCheck.isFractional(4)); // Output: false

That covers the functions provided by the valueCheck module. You can now use these functions in your TypeScript code to perform checks on numeric values.

This documentation provides an overview of the functions available in the valueCheck module, their parameters, return types, and examples of usage. You can use this documentation to understand and utilize the functionalities provided by the module.

Additional Documentation

For more comprehensive documentation and details about the functions and features not covered here, please check the documentation folder in the project repository. You can find more in-depth explanations and usage examples for the functions provided in the code.

Troubleshooting

• "Utiliti Error: url must be a string" when using the Http function: This error occurs when the url argument passed to the Http function is not a string. Make sure that you are passing a valid string as the url argument.

• "Utiliti Error: header must be an object" when using the Http function: This error occurs when the header argument passed to the Http function is not an object. Make sure that you are passing a valid object as the header argument.

• "Utiliti Error: data must be an array" when using the DataFilter function: This error occurs when the data argument passed to the DataFilter function is not an array. Make sure that you are passing a valid array as the data argument

• "Utiliti Error: the body of the request must be an object" when using the Http function: This error occurs when the data argument passed to the Http function is not an object. Make sure that you are passing a valid object as the data argument.

• "Utiliti Error: filter must be a function" when using the DataFilter function: This error occurs when the filter argument passed to the DataFilter function is not a function. Make sure that you are passing a valid function as the filter argument.

Release Notes - Version 2.0.32

The library now supports Typescript fully.

Release Notes - Version 2.0.33

The library now provides a wide range of utility functions for mathematical operations, string manipulation, date manipulation, and includes an interface for creating and managing stores.

Changelog

[2.0.32] - 04-06-2023

Added

• TypeScript support: The library has been converted to TypeScript to provide type safety and improved developer experience. TypeScript definitions have been added to enable better code analysis, autocompletion, and error checking.
• Updated build process: The build process now includes a TypeScript compiler step using ts-loader in webpack configuration. This ensures that TypeScript files are transpiled to JavaScript during the build process, allowing seamless integration with existing JavaScript projects.
• Enhanced type definitions: Type definitions have been added or updated throughout the library to provide more accurate and descriptive types. This helps developers to write more reliable and maintainable code by catching type errors during development.
• Improved error handling: Error handling has been improved throughout the library. Custom error types have been used to provide more informative error messages, helping developers to identify and resolve issues more efficiently.
• Refactored and optimized code: The codebase has been refactored to follow best practices and improve performance. Redundant code has been removed, and optimizations have been made to enhance the overall efficiency of the library.

Store Class Enhancements

In this release, we have made significant enhancements to the Store class, providing improved type safety and ensuring that the type of the action passed to the dispatch method matches the type of action expected by the reducer function.

New Generic Parameters

The Store class is now defined as a generic class with two type parameters: T for the state type and A for the action type. This allows for better type inference and ensures type consistency throughout the store's methods.

Updated reducer and dispatch Methods

The reducer parameter in the constructor and the dispatch method have been updated to use the new action type A. This enforces that only actions of the specified type can be dispatched to update the state.

Example usage:

interface AppState {
  count: number;
}

interface IncrementAction {
  type: "INCREMENT";
  payload: number;
}

const reducer = (state: AppState, action: IncrementAction): AppState => {
  // ...
};

const initialState: AppState = { count: 0 };

const store = new Store<AppState, IncrementAction>(reducer, initialState);

Improved Type Safety

By specifying the action type when creating a new Store instance, TypeScript can now provide better type checking and inference. It ensures that the reducer function expects and handles the correct action type, reducing the chances of runtime errors caused by incompatible actions.

Fixed

• Addressed issues reported in previous versions: Various bugs reported in previous versions have been fixed to ensure the library works as expected and provides a stable experience.

Other Changes

• Improved error handling

[2.0.33] - 06-06-2023

Added

• Added mathematical utility functions:

  • import { maths } from "utiliti-js"
  • clamp: Restricts a value within a specified range.
  • lerp: Performs linear interpolation between two values.
  • toDegrees: Converts an angle from radians to degrees.
  • toRadians: Converts an angle from degrees to radians.
  • roundTo: Rounds a number to a specified number of decimal places.
  • randomInt: Generates a random integer within a specified range.
  • sum: Calculates the sum of an array of numbers.
  • average: Calculates the average of an array of numbers.
  • min: Finds the minimum value in an array of numbers.
  • max: Finds the maximum value in an array of numbers.
  • factorial: Calculates the factorial of a number.
  • fibonacci: Generates the Fibonacci sequence up to a specified number of terms.
  • isPrime: Checks if a number is prime.
  • gcd: Calculates the greatest common divisor of two numbers.
  • lcm: Calculates the least common multiple of two numbers.
  • isEven: Checks if a number is even.
  • isOdd: Checks if a number is odd.

• Added string manipulation utility functions:

  • import { strings } from "utiliti-js"
  • capitalize: Converts the first character of a string to uppercase.
  • reverse: Reverses the characters in a string.
  • truncate: Truncates a string to a specified length.
  • startsWith: Checks if a string starts with a specified prefix.
  • endsWith: Checks if a string ends with a specified suffix.
  • contains: Checks if a string contains a specified substring.
  • replaceAll: Replaces all occurrences of a substring in a string.
  • countWords: Counts the number of words in a string.
  • countCharacters: Counts the number of characters in a string.
  • stripTags: Removes HTML tags from a string.
  • isValidEmail: Checks if a string is a valid email address.
  • isValidURL: Checks if a string is a valid URL.

• Added date manipulation utility functions to DateFilter:

  • isLeapYear: Checks if a given year is a leap year.
  • getDaysInMonth: Gets the number of days in a month for a given year.
  • addDays: Adds a specified number of days to a given date.
  • subtractDays: Subtracts a specified number of days from a given date.
  • compareDates: Compares two dates and returns the difference in days.
  • isPastDate: Checks if a given date is in the past.

• Added IStore interface for Store class.

Please note that this is a major release that introduces significant changes to the library. It is recommended to thoroughly test the updated library in your project environment before deploying it to production. If you encounter any issues or have any feedback, please don't hesitate to reach out to us.

We hope that these enhancements will improve the overall developer experience and help catch potential issues at compile-time. Happy coding!

Fixed

• No issue reported since last release.

Contributions

UtilitiJs is an open-source project, and contributions from the community are to contribute to the library, please visit the UtilitiJs GitHub repository for more information. highly encouraged. If you encounter any issues, have feature requests, or want

UtilitiJs is built and maintained by a passionate developer who aim to provide a reliable and feature-rich utility library to the JavaScript community.

License

UtilitiJs is released under the MIT License. You are free to use, modify, and distribute the library in your projects, both personal and commercial.

Start leveraging the power of UtilitiJs to simplify your JavaScript development and unlock new possibilities in your projects. Happy coding with UtilitiJs!

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Copyright © 2023 Adeniji Oluwaferanmi. All Rights Reserved.