dev-utilz

Utility functions to speedup development

Table of contents

• install

• String utilities

  • capitalize
  • capitalizeAll
  • endWith
  • isString
  • isNotEmpty
  • returnValidString
  • throwErrorIfNotString
  • toLowerCase
  • toUpperCase
  • getFirstLetters
  • getSubString
  • getLastLetters
  • startWith
  • times
  • padStart
  • padEnd
  • stringSize

• Number #TODO

Install

Install with npm:

$ npm install --save dev-utilz

String utilities

This library will support following string utility functions

isString

Check whether the given value is string or not. if valid string return tru else false.

usage

import { isString } from "dev-utilz";

console.log(isString("string")); // true
console.log(isString(1)); // false

isNotEmpty

Check whether the string is empty or not.

• If empty return false else not.
• If it's string, check whether it's empty or not else return false
• If doTrim is true, trim the string before check. default value is false.

import { isNotEmpty } from "dev-utilz";

console.log(isNotEmpty("string")); // true
console.log(isNotEmpty(1)); // false
console.log(isNotEmpty("")); // false
console.log(isNotEmpty(" ")); // true
console.log(isNotEmpty(" ", true)); // false

returnValidString

If value is string return value else return empty string.

import { returnValidString } from "dev-utilz";

console.log(returnValidString("string")); // "string"
console.log(returnValidString(1)); // ""

capitalize

Capitalize the string

import { capitalize } from "dev-utilz";

console.log(capitalize("string")); // String
console.log(capitalize("test String")); // Test string

capitalizeAll

Capitalize each word in string

import { capitalizeAll } from "dev-utilz";

console.log(capitalizeAll("string")); // String
console.log(capitalizeAll("test string")); // Test String

throwErrorIfNotString

Throw error if value is not a string else return string

import { throwErrorIfNotString } from "dev-utilz";

console.log(throwErrorIfNotString("string")); // string
console.log(throwErrorIfNotString("")); // ""
console.log(throwErrorIfNotString(1)); // throw error

toLowerCase

Convert entire string to lowercase

import { toLowerCase } from "dev-utilz";

console.log(toLowerCase("string")); // string
console.log(toLowerCase("TEST String")); // test string

toUpperCase

Convert entire string to uppercase

import { toUpperCase } from "dev-utilz";

console.log(toUpperCase("string")); // STRING
console.log(toUpperCase("TEST String")); // TEST STRING

getFirstLetters

Function to get the first n letters of a string

import { getFirstLetters } from "dev-utilz";

console.log(getFirstLetters("string", 2)); // st

getSubString

Function to get substring from given string

import { getSubString } from "dev-utilz";
console.log(getSubString("John", 1, 3)); // oh

getLastLetters

Function to get the last n letters of a string

import { getLastLetters } from "dev-utilz";

console.log(getLastLetters("string", 2)); // ng

startWith

Check whether the string is start with given string

import { startWith } from "dev-utilz";
console.log(startWith("string", "str")); // true
console.log(startWith("TEST String", "John")); // false

endWith

Check whether the string is end with given string

import { endWith } from "dev-utilz";
console.log(endWith("string", "ing")); // true
console.log(endWith("TEST String", "John")); // false

times

Function to repeat string n times and return array

import { times } from "dev-utilz";
console.log(times("string", 2)); // ["string","string"]

padStart

Pads string on the left side if it's shorter than length. Padding characters are truncated if they exceed length.

import { padStart } from "dev-utilz";
console.log(padStart("abc", 6)); // '   abc'
console.log(padStart("abc", 6, "_")); // '___abc'

padEnd

Pads string on the right side if it's shorter than length. Padding characters are truncated if they exceed length.

import { padEnd } from "dev-utilz";
console.log(padEnd("abc", 6)); // 'abc   '
console.log(padEnd("abc", 6, "_")); // 'abc___'

stringSize

Gets the number of symbols in string.

import { stringSize } from "dev-utilz";
console.log(stringSize("qwerty")) // 6