fullcalendar/src/common/Iterator.js

function Iterator(items) {
    this.items = items || [];
}


Iterator.prototype.iterate = function(callback) {
    this.items.forEach(callback);
};


/* Calls a method on every item passing the arguments through */
Iterator.prototype.proxyCall = function(methodName) {
    var args = Array.prototype.slice.call(arguments, 1);
    var results = [];

    this.iterate(function(item) {
        results.push(item[methodName].apply(item, args));
    });

    return results;
};