gistfile1.js

Array.prototype.forSome = function(callback, thisValue) {
    if (typeof thisValue !== 'object') {
        thisValue = null;
    }
    try {
        for (var i = 0; i < this.length; i++) {
            if (this.hasOwnProperty(i)) {
                var returnValue = callback.call(thisValue, this[i], i, this);
                if (typeof returnValue !== 'undefined') {
                    return returnValue;
                }
            }
        }
    } catch (error if error === StopIteration) {

    }
};