JavaScript 배열 filter()

1 개요

JavaScript array_filter()

JavaScript

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let arr = ['foo', false, -1, null, ''];
let output = arr.filter(x=>x);
console.log( output ); // ["foo", -1]

▶	["foo", -1]

JavaScript

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let arr = ['foo', false, -1, null, ''];
console.log( arr.filter( function(a){ return a; } ) ); // ["foo", -1]

▶	["foo", -1]

JavaScript

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function array_filter(arr) { return arr.filter( function(a){ return a; } ) }
var arr = ['foo', false, -1, null, ''];
console.log( array_filter(arr) );
// ["foo", -1]

JavaScript

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arr = [1, 4, 3, 2, 1, 2, 3, 2]
console.log( arr.filter(num => num === 2) )
// [ 2, 2, 2 ]

2 같이 보기

• 함수 array_filter()