locutus/esm/ruby/Array/uniq.js

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

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