Underscore.JS - every method

Syntax

_.every(list, predicate, [context])

every method iterates over a given list of element, calls the predicate on each element. It returns true if all values of collection match the given predicate.

Example

var _ = require('underscore');

var list = [2, 4, 6]
//Example 1. check if all numbers are even
var result = _.every(list, function(num) { return (num % 2 == 0) });
console.log(result);

list = [1, 2, 4, 6]
//Example 2. check if all numbers are even
var result = _.every(list, function(num) { return (num % 2 == 0) });
console.log(result);

Save the above program in tester.js. Run the following command to execute this program.

Command

\>node tester.js

Output

true
false