StringJs

StringJs is a library that introduces useful and easy functions to manipulate strings in JavaScript

Features

• import this package in your project
• choose a string and the right function in this library
• now you have your formatted string!

Installation

npm install --save stringjs

or

yarn add stringjs

How To Import and Use

const stringjs = require('stringjs')

or

import stringjs from 'stringjs'

After this import you can use any function provided in the section below with this call structure

stringjs.capitalizeFirst()

Functions and Methods

| Method | Input | Output | | ------ | ----- | ------ | | capitalizeFirst | a string | The string with the first letter capitalized | | capitalizeLast | a string | The string with the last letter capitalized | | capitalizeByIndex | a string and a parameter of type number, array or function | The string with the letter in the index provided (zero-based) capitalized. In case the provided second parameter is an array of integers, the string is capitalized in all the index positionsIn case the provided second parameter is a function, the function is used to test if the index matches the boolean condition of the function and then makes that character in uppercase If the index is greater then the string's length, returns the string as provided | | capitalizeByLetter | a string and a parameter of type number, array or function | Converts in uppercase all the occurencies of the letter provided In case the provided second parameter is an array of characters, all the letters included in the array are converted in uppercaseIn case the provided second parameter is a function, the function is used to test if the letter matches the boolean condition of the function and then makes that characters in uppercase | | deCapitalizeFirst | a string | The string with the first letter decapitalized | | deCapitalizeLast | a string | The string with the last letter decapitalized | | deCapitalizeByIndex | a string and a parameter of type number, array or function | The string with the letter in the index provided (zero-based) capitalized. In case the provided second parameter is an array of integers, the string is decapitalized in all the index positionsIn case the provided second parameter is a function, the function is used to test if the index matches the boolean condition of the function and then makes that character in lowercase If the index is greater then the string's length, returns the string as provided | | deCapitalizeByLetter | a string and a parameter of type number, array or function | Converts in lowercase all the occurencies of the letter provided In case the provided second parameter is an array of characters, all the letters included in the array are converted in lowercaseIn case the provided second parameter is a function, the function is used to test if the letter matches the boolean condition of the function and then makes that characters in lowercase |

Working Examples

capitalizeFirst

stringjs.capitalizeFirst('my cool string')

// OUTPUT: My cool string

capitalizeLast

stringjs.capitalizeLast('my cool string')

// OUTPUT: my cool strinG

capitalizeByIndex

stringjs.capitalizeByIndex('my cool string', 3)

// OUTPUT: my Cool string



stringjs.capitalizeByIndex('my cool string', 50)

// OUTPUT: my cool string



stringjs.capitalizeByIndex('my cool string', [0, 1, 5, 20, 6, 13])

// OUTPUT: MY coOL strinG



stringjs.capitalizeByIndex('my cool string', (i) => { return i === 3 || i === 5 })

// OUTPUT: my CoOl string

capitalizeByLetter

stringjs.capitalizeByLetter('test', 't')

// OUTPUT: TesT



stringjs.capitalizeByLetter('test', ['t', 'e'])

// OUTPUT: TEsT



stringjs.capitalizeByLetter('test', (l) => { return l === 'e' || l === 's' })

// OUTPUT: tESt

deCapitalizeFirst

stringjs.deCapitalizeFirst('TEST')

// OUTPUT: tEST

deCapitalizeLast

stringjs.deCapitalizeLast('TEST')

// OUTPUT: TESt

deCapitalizeByIndex

stringjs.deCapitalizeByIndex('MY COOL STRING', 3)

// OUTPUT: MY cOOL STRING



stringjs.deCapitalizeByIndex('MY COOL STRING', 50)

// OUTPUT: MY COOL STRING



stringjs.deCapitalizeByIndex('MY COOL STRING', [0, 1, 5, 20, 6, 13])

// OUTPUT: my COol STRINg



stringjs.deCapitalizeByIndex('MY COOL STRING', (i) => { return i === 3 || i === 5 })

// OUTPUT: MY cOoL STRING

deCapitalizeByLetter

stringjs.deCapitalizeByLetter('TEST', 'T')

// OUTPUT: tESt



stringjs.deCapitalizeByLetter('TEST', ['T', 'E'])

// OUTPUT: teSt



stringjs.deCapitalizeByLetter('TEST', (l) => { return l === 'E' || l === 'S' })

// OUTPUT: TesT

License

MIT