immutable-arr-methods

Convert all mutable array's methods to immutable

Also available custom immutable array's methods for different scenarios custom-arr-methods

Installation

npm install immutable-arr-methods

Usage

All methods have tooltips when you hover over them

pop

Return last element from array without mutable source array

import { pop } from 'immutable-arr-methods'

const i = [1, 2, 3, 4, 5]

const j = pop(i) // (array)

console.log(i) // [1, 2, 3, 4, 5]
console.log(j) // 5

push

Return new array with a new elements at end of array without mutable source array

import { push } from 'immutable-arr-methods'

const i = [1, 2, 3, 4, 5]

const j = push(i, 42, 42) // (array, itemN)

console.log(i) // [1, 2, 3, 4, 5]
console.log(j) // [1, 2, 3, 4, 5, 42, 42]

shift

Return first element from array without mutable source array

import { shift } from 'immutable-arr-methods'

const i = [1, 2, 3, 4, 5]

const j = shift(i) // (array)

console.log(i) // [1, 2, 3, 4, 5]
console.log(j) // 1

unshift

Return new array with new a elements at start of array without mutable source array

import { unshift } from 'immutable-arr-methods'

const i = [1, 2, 3, 4, 5]

const j = unshift(i, 42, 42) // (array, itemN)

console.log(i) // [1, 2, 3, 4, 5]
console.log(j) // [42, 42, 1, 2, 3, 4, 5]

reverse

Return new reversed array without mutable source array

import { reverse } from 'immutable-arr-methods'

const i = [1, 2, 3, 4, 5]

const j = reverse(i) // (array)

console.log(i) // [1, 2, 3, 4, 5]
console.log(j) // [5, 4, 3, 2, 1]

sort

Return new sorted array without mutable source array

import { sort } from 'immutable-arr-methods'

const i = [7, 1, 33, 444, 42]

const j = sort(i, (a, b) => a - b) // (array, callbackFn)

console.log(i) // [7, 1, 33, 444, 42]
console.log(j) // [1, 7, 33, 42, 444]

splice

Return new spliced array without mutable source array

import { splice } from 'immutable-arr-methods'

const i = [1, 2, 3, 4, 5]

const j = splice(i, 1, 2, [42, 42]) // (array, startIndex, deleteCount, elements)

console.log(i) // [1, 2, 3, 4, 5]
console.log(j) // [1, 42, 42, 4, 5]