locutus/esm/ruby/String/upcase.js

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

export function upcase(str) {
    // parity verified: Ruby 3.3
    //      discuss at: https://locutus.io/ruby/String/upcase/
    //     original by: Kevin van Zonneveld (https://kvz.io)
    //          note 1: Returns a copy of str with all lowercase letters replaced with uppercase.
    //       example 1: upcase('hELLo')
    //       returns 1: 'HELLO'
    return (str + '').toUpperCase();
}