Utility Package

A versatile utility package providing a wide range of functions for various programming needs. This documentation covers the String-Utility section.

Installation

Install the package via npm:

npm install gm-utility

String Utility

The String-Utility module provides powerful string manipulation functions. Below is a detailed list of available functions, along with examples.

Guide to Import Package ESModule/CommonJS

// Using ES Module (import)
import { Utility } from 'gm-utility';
const StringUtil = Utility.string;

// Using CommonJS (require)
const { Utility } = require('gm-utility');
const StringUtil = Utility.string;

Available Functions

getRandomCharacters

Generates random hex-string

const randomString = StringUtil.getRandomCharacters();
console.log(randomString); // Example: "a3f7c9"

getSubstring

Extracts a substring from a string using start index and length.

const result = StringUtil.getSubstring('hello', 3, 1);
console.log(result); // Output: "el"

getStringBetweenStrings

Extracts the substring between two specified substrings within a string.

const result = StringUtil.getStringBetweenStrings('hello developer world', 'hello', 'world');
console.log(result); // Output: "developer"

getLastNCharacters

Returns the last n characters of a string.

const result = StringUtil.getLastNCharacters('hello', 2);
console.log(result); // Output: "lo"

splitTextInLinesByLength

Splits a string into multiple lines, with each line having a specified maximum length.

const lines = StringUtil.splitTextInLinesByLength('hello world', 3);
console.log(lines); // Output: ["hel", "lo ", "wor", "ld"]

splitWordsInLinesByMaxLineLength

Splits text into lines by breaking at word boundaries, ensuring each line respects a specified character limit.

const lines = StringUtil.splitWordsInLinesByMaxLineLength('hello world', 5);
console.log(lines); // Output: ["hello", "world"]

capitalizeFirstLetter

Capitalizes the first letter of each word in a string.

const result = StringUtil.capitalizeFirstLetter('hello-world');
console.log(result); // Output: "Hello-World"

abbreviateString

Generates an abbreviation by taking the first character of each word.

const abbreviation = StringUtil.abbreviateString('La Alta Vita');
console.log(abbreviation); // Output: "LAV"

getCleanSplit

Splits a string into parts using a specified delimiter.

const parts = StringUtil.getCleanSplit('hello,world', ',');
console.log(parts); // Output: ["hello", "world"]

URL Utility NPM Package

A powerful utility package to simplify handling URLs, encode/decode URI strings, manipulate query strings, and extract essential request metadata. Ideal for developers working with HTTP requests and URL manipulations.

Guide to Import Package ESModule/CommonJS

// Using ES Module (import)
import { Utility } from 'gm-utility';
const UrlUtil = Utility.url;

// Using CommonJS (require)
const { Utility } = require('gm-utility');
const UrlUtil = Utility.url;

Features

• Convert relative URLs to absolute URLs.
• Encode and decode strings in base64.
• Convert objects to query strings.
• Extract and reduce essential information from request objects.
• Determine if a request is a developer request.

Available Functions

makeAbsolute(path: string, baseUrl: string): string

Converts a relative URL to an absolute URL.

Example:

UrlUtil.makeAbsolute("/user/login", "https://dev-test.com");
// Output: "https://dev-test.com/user/login"

encodeURI(uri: string): string

Encodes a URI string into a base64 format.

Example:

UrlUtil.encodeURI("www.test.com/dashboard");
// Output: "d3d3LnRlc3QuY29tL2Rhc2hib2FyZA=="

decodeURI(encoded: string): string

Decodes a base64 encoded string back to its original text.

Example:

UrlUtil.decodeURI("d3d3LnRlc3QuY29tL2Rhc2hib2FyZA==");
// Output: "www.test.com/dashboard"

convertObjectToQueryString(obj: object): string

Converts an object into a query string.

Example:

UrlUtil.convertObjectToQueryString({ Name: "John", ID: 1120, Age: 60 });
// Output: "?Name=John&ID=1120&Age=60&"

getReducedRequest(request: object): object

Extracts and reduces relevant information from a request object.

Example:

UrlUtil.getReducedRequest({
  body: { name: "John Doe", age: 30 },
  params: {},
  query: { search: "term" },
  headers: { "content-type": "application/json" },
  method: "POST",
  url: "/example?search=term",
  path: "/example",
  ip: "127.0.0.1"
});
// Output: Reduced request object

isDeveloperRequest(headers: object, method: string, isDev: boolean): boolean

Determines if a request is a developer request.

Example:

UrlUtil.isDeveloperRequest({ "content-type": "application/json" }, 'POST', true);
// Output: false

Data Structures Utility

A utility library for performing common operations on arrays, objects, and strings. It includes methods for transformations, aggregations, and mathematical operations to simplify your development.

Guide to Import Package ESModule/CommonJS

// Using ES Module (import)
import { Utility } from 'gm-utility';
const DsUtil = Utility.ds;

// Using CommonJS (require)
const { Utility } = require('gm-utility');
const DsUtil = Utility.ds;

Available Functions

transformArrayToObjectByKey<T>(arr: T[], key: keyof T): Record<string, T>

Converts an array of objects into a single object, keyed by a specific property.

Example:

const data = [
  { id: '1', name: 'Alice' },
  { id: '2', name: 'Bob' }
];
const result = dsUtilInstance.transformArrayToObjectByKey(data, 'id');
console.log(result);
// Output: { '1': { id: '1', name: 'Alice' }, '2': { id: '2', name: 'Bob' } }

generateRange(stop: number, start: number = 1, step: number = 1): number[]

Generates an array of numbers within a range.

Example:

const range = dsUtilInstance.generateRange(10, 1, 2);
console.log(range);
// Output: [1, 3, 5, 7, 9]

findIntersection(n: any[], e: any[]): any[]

Finds the intersection of two arrays.

Example:

const result = dsUtilInstance.findIntersection([1, 2, 3], [2, 3, 4]);
console.log(result);
// Output: [2, 3]

getObjectSubset(obj: Record<string, any>, keys: string[]): Record<string, any>

Extracts a subset of an object based on a set of keys.

Example:

const obj = { a: 1, b: 2, c: 3 };
const subset = dsUtilInstance.getObjectSubset(obj, ['a', 'c']);
console.log(subset);
// Output: { a: 1, c: 3 }

findMatchingObjectInArray<T extends Record<string, any>>(obj1: T, arr1: T[]): T | undefined

Finds an object in an array that matches all properties of the target object.

Example:

const data = [ { id: 1, name: 'Alice' }, { id: 2, name: 'Bob' } ];
const result = dsUtilInstance.findMatchingObjectInArray({ id: 2 }, data);
console.log(result);
// Output: { id: 2, name: 'Bob' }

removeUnknownCharacters(str: string): string

Removes unwanted characters from a string.

Example:

const cleanStr = dsUtilInstance.removeUnknownCharacters('abc@#$123');
console.log(cleanStr);
// Output: 'abc123'

roundNumericalFields<T extends Record<string, unknown>>(e: T): T

Rounds all numerical fields in an object to two decimal places.

Example:

const obj = { a: 1.2345, b: 2.5678 };
const result = dsUtilInstance.roundNumericalFields(obj);
console.log(result);
// Output: { a: 1.23, b: 2.57 }

getElemCountOfArray<T>(d: T[], type: 'object' | 'array'): Record<string, number> | { key: T, frequency: number }[]

Counts the frequency of elements in an array.

Example:

const arr = [1, 2, 2, 3];
const count = dsUtilInstance.getElemCountOfArray(arr, 'array');
console.log(count);
// Output: [ { key: 1, frequency: 1 }, { key: 2, frequency: 2 }, { key: 3, frequency: 1 } ]

flattenObject(obj: Record<string, any>): Record<string, any>

Flattens a nested object into a single-level object.

Example:

const nested = { a: { b: { c: 1 } } };
const result = dsUtilInstance.flattenObject(nested);
console.log(result);
// Output: { '.a.b.c': 1 }

createBatchFromArray<T>(arr: T[], n: number = 50): T[][]

Splits an array into batches of a specified size.

Example:

const result = dsUtilInstance.createBatchFromArray([1, 2, 3, 4, 5], 2);
console.log(result);
// Output: [ [1, 2], [3, 4], [5] ]

convergeValueToCheckpoints(value: number, checkpoints: number[]): number | null

Finds the closest checkpoint for a given value.

Example:

const checkpoints = [10, 20, 30];
const result = dsUtilInstance.convergeValueToCheckpoints(25, checkpoints);
console.log(result);
// Output: 30

roundoff(val: number, decimals: number): number

Rounds a number to a specified number of decimal places.

Example:

const rounded = dsUtilInstance.roundoff(1.234567, 3);
console.log(rounded);
// Output: 1.235

datetime-utils

A utility package for simplifying date and time operations using the moment library. It provides a set of functions to manipulate and format dates and times easily in JavaScript and TypeScript projects.

Guide to Import Package ESModule/CommonJS

// Using ES Module (import)
import { Utility } from 'gm-utility';
const datetimeUtil = Utility.datetime;

// Using CommonJS (require)
const { Utility } = require('gm-utility');
const datetimeUtil = Utility.datetime;

Available Functions

getDateObj(input: string | Date, format: string = 'YYYY-MM-DD HH:mm:ss'): Moment | string

Parses the given input date and returns a Moment object or formatted string.

Example:

const formattedDate = datetimeUtilInstance.formatDate('2023-12-24');
console.log(formattedDate);// '2023-12-24'

formatDate(input: string | Date, format: string = 'YYYY-MM-DD'): Moment | string

Formats a given date into the specified format.

Example:

const diff = datetimeUtilInstance.dateDifferenceBetween('2023-12-24', '2023-12-31', 'days');
console.log(diff); // -7

now(): Moment

Returns the current date and time as a Moment object.

Example:

const currentDate = datetimeUtilInstance.now();
console.log(currentDate.format('YYYY-MM-DD HH:mm:ss'));

addDaysToDate(input: string | Date, nDays: number, format = 'YYYY-MM-DD HH:mm:ss'): Moment | string

Returns the current date and time as a Moment object.

Example:

const newDate = datetimeUtilInstance.addDaysToDate('2024-12-24', 5);
console.log(newDate.format('YYYY-MM-DD')); // Output: '2024-12-29'

isDateBetween(stDate: string | Moment, enDate: string | Moment, input: string | Moment): string | boolean

Checks if a given date is between two other dates.

Example:

const isBetween = datetimeUtilInstance.isDateBetween('2024-12-20', '2024-12-30', '2024-12-24');
console.log(isBetween); // Output: true

getDOW(input: string | Moment): number

Returns the day of the week (0-6) for the given date.

Example:

const dow = datetimeUtilInstance.getDOW('2024-12-24');
console.log(dow); // Output: 2 (Tuesday)

dateDifferenceBetween(start: Moment | string, end: Moment | string, on: moment.unitOfTime.Diff = 'days'): number

Calculates the difference between two dates based on the specified unit of time (default is days).

Example:

const diffInDays = datetimeUtilInstance.dateDifferenceBetween('2024-12-24', '2024-12-20');
console.log(diffInDays); // Output: 4

addDeltaToMoment(delta = 600, input = moment.now(), deltaDef: DurationConstructor = 'seconds')

Adds a specified delta (in seconds by default) to a given date and returns the result.

Example:

const newDate = datetimeUtilInstance.addDeltaToMoment(600, '2024-12-24', 'seconds');
console.log(newDate.format('YYYY-MM-DD HH:mm:ss')); // Output: '2024-12-24 00:10:00'

getMax(lTime: Moment, rTime: Moment): Moment | null

Returns the maximum (latest) of the two provided Moment objects.

Example:

const maxTime = datetimeUtilInstance.getMax('2024-12-24 12:00:00', '2024-12-24 10:00:00');
console.log(maxTime.format('YYYY-MM-DD HH:mm:ss')); // Output: '2024-12-24 12:00:00'

startOfDay(input: Moment | string, format = 'YYYY-MM-DD HH:mm:ss'): string

Returns the start of the day (midnight) for the given date.

Example:

const startOfDay = datetimeUtilInstance.startOfDay('2024-12-24');
console.log(startOfDay); // Output: '2024-12-24 00:00:00'

endOfDay(input: Moment | string, format = 'YYYY-MM-DD HH:mm:ss'): string

Returns the end of the day (23:59:59) for the given date.

Example:

const endOfDay = datetimeUtilInstance.endOfDay('2024-12-24');
console.log(endOfDay); // Output: '2024-12-24 23:59:59'

Contributions are welcome! Please follow the steps below:

1. Fork the repository.
2. Create a feature branch.
3. Commit your changes.
4. Open a pull request.

License

This package is licensed under the ISC License. See the LICENSE file for more details.

Feedback

If you encounter any issues or have suggestions, feel free to create an issue in the repository or reach out.

Happy coding!