Javascript Unique Values In Array

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javascript unique values in array 30 seconds of code

JavaScript Unique Values In Array 30 Seconds Of Code

Var unique array map p p age filter age index arr arr indexOf age index sort sorting is optional or in ES6 var unique new Set array map p p age or with lodash var unique uniq map array age There are two common ways (in ES5 and ES6, respectively) of getting unique values in JavaScript arrays of primitive values. Basically, in ES5, you first define a distinct callback to check if a value first occurs in the original array, then filter the original array so that only first-occurred elements are kept.

javascript unique values in array based on function 30 seconds of code

JavaScript Unique Values In Array Based On Function 30 Seconds Of Code

Javascript Unique Values In ArrayWe can get all unique values in a JavaScript array in the following ways: Table of Content. Method 1: Using for loop. Method 2: Using the Array filter () method: Method 3: Using set () Method. Method 4: Using reduce () Method. Method 5: Using forEach () Method. Method 6: Using indexOf () Method. Method 7: Using Underscore.js _.uniq (). Var arr a a b var uniqueArray Array from new Set arr Unique Array a b Sets are always unique and using Array from you can convert a Set to an array For reference have a look at the documentations