Essential Utils

A random collection of various handy JavaScript utilities.

Array

arrayChunk()

• Returns new array with chunked values from original array.

Parameters: array, [size = 1]

import { arrayChunk } from "essential-utils";

arrayChunk([1, 2, 3, 4], 2); // [[1, 2], [3, 4]]

arraySum()

• Returns sum of all values from passed array.

Parameters: array, fn, [defaultValue = 0]

import { arraySum } from "essential-utils";

arraySum([1, 2, 3, 4]); // 10;

arrayShuffle()

• Returns provided array with shuffled values.

Parameters: array

import { arrayShuffle } from "essential-utils";

arrayShuffle([1, 2, 3, 4]); // e.g. [2, 1, 4, 3]

numberRange()

• Returns range between two values in array.

Parameters: start, end, [step = 1]

import { numberRange } from "essential-utils";

numberRange(0, 2); // [0, 1, 2];
numberRange(0, 3, 2); // [0, 2];

Iterable

iterableToObject()

• Transforms iterable which has forEach function implemented into object.

Parameters: iterable

import { iterableToObject } from "essential-utils";

iterableToObject([0, 5]); // { 0: 0, 1: 5 }
iterableToObject(new Map([["number", 42]])); // { number: 42 }

iterableToJson()

• Transforms iterable into JSON.

Parameters: iterable

Object

objectMap()

• Returns either new object or original object with mapped values.

Parameters: object, callback, isInPlace

import { objectMap } from "essential-utils";

const object = { first: 2, second: 3 };

objectMap(object, value => value ** 2); // { first: 4, second: 8 }
console.log(object); // { first: 2, second: 3 }

objectMap(object, value => value ** 2, true); // { first: 4, second: 8 }
console.log(object); // { first: 4, second: 8 }

Url

getQueryParams()

• Parses url and returns object with key and value pairs from query.

Parameters: url

import { getQueryParams } from "essential-utils";

getQueryParams("?a=5&b=4&a=6"); // { a: ["5", "6"], b: "4" }
getQueryParams("?a[]=5&b[]=4&a[]=6"); // { a: ["5", "6"], b: ["4"] }
getQueryParams("?a=5,6&b=4"); // { a: ["5", "6"], b: "4" }
getQueryParams("?a[]=5,6&b[]=4"); // { a: ["5", "6"], b: ["4"] }