Lodash

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Collection

includes

Checks if value is in collection.

// for string, it checks for a substring of value if (_.includes('abcd', 'bc')) { } // true

Array

uniq

Creates a duplicate-free version of an array.

const duplicateFreeArray = _.uniq([1, 2, 2]); // [1, 2]

String

replace

Replace pattern match with replacement.

// only the first match is replaced const result = _.replace('A.B.C', '.', '_'); // A_B.C // with a regex with 'g', all the matches are replaced const result = _.replace('A.B.C', /\w/g, '_'); // _._._

Object

forOwn

Iterates over own enumerable string keyed properties of an object.

let json = { "A": "1", "B": "2", "C": { "C1": "3", "C2": "4" }, "D": [ "5", "6" ] }; _.forOwn(json, (value, key) => { console.log(`key: ${key} - value: ${value}`); }); // key: A - value: 1 // key: B - value: 2 // key: C - value: [object Object] // key: D - value: 5,6