locutus/esm/ruby/Array/compact.js

Locutus other languages' standard libraries to JavaScript for fun and educational purposes

export function compact(arr) {
    // parity verified: Ruby 3.3
    //      discuss at: https://locutus.io/ruby/Array/compact/
    //     original by: Kevin van Zonneveld (https://kvz.io)
    //          note 1: Returns a new array with all nil (null/undefined) values removed.
    //       example 1: compact(['a', null, 'b', undefined, 'c'])
    //       returns 1: ['a', 'b', 'c']
    //       example 2: compact([1, 2, 3])
    //       returns 2: [1, 2, 3]
    if (!Array.isArray(arr)) {
        return [];
    }
    return arr.filter((item) => item != null);
}