An interval manager for javascript

intervalManager.js

/**
     * Original by Zirak @ http://stackoverflow.com/a/8636050/1012431
     * 
     * Had some issues with the clear function
     * 
     * @type {{intervals: Array, make: make, clear: clear, clearAll: clearAll}}
     */
    var interval = {
        //to keep a reference to all the intervals
        intervals : [],

        //create another interval
        make : function (fun, delay) {

            var newKey = this.intervals.length +1;

            this.intervals[newKey] = setInterval(fun,delay);

            return newKey;
        },

        //clear a single interval
        clear : function ( id ) {
            clearInterval( this.intervals[id] );
            delete this.intervals[id];
            return true;
        },

        //clear all intervals
        clearAll : function () {
            for (var key in this.intervals) {
                clearInterval(this.intervals[key]);
                delete this.intervals[key];
            }
        }
    };