promisify.js
function append(arrlike /* , items... */) {
    return Array.prototype.slice.call(arrlike, 0).concat(Array.prototype.slice.call(arguments, 1));
}
function append(arrlike /* , items... */) {
    return Array.prototype.slice.call(arrlike, 0).concat(Array.prototype.slice.call(arguments, 1));
}
function append ( arrlike /* , items... */ ) { return Array . prototype . slice . call ( arrlike , 0 ) . concat ( Array . prototype . slice . call ( arguments , 1 ) ) ; }
Append items to an array-like object
Append items to an array - like object