diegopamio/angular-sails-bind

/**
 * Created by dpamio on 18/05/14.
 */
if (!Array.prototype.find) {
    Object.defineProperty(Array.prototype, 'find', {
        enumerable: false,
        configurable: true,
        writable: true,
        value: function(predicate) {
            if (this == null) {
                throw new TypeError('Array.prototype.find called on null or undefined');
            }
            if (typeof predicate !== 'function') {
                throw new TypeError('predicate must be a function');
            }
            var list = Object(this);
            var length = list.length >>> 0;
            var thisArg = arguments[1];
            var value;

            for (var i = 0; i < length; i++) {
                if (i in list) {
                    value = list[i];
                    if (predicate.call(thisArg, value, i, list)) {
                        return value;
                    }
                }
            }
            return undefined;
        }
    });
}

function findElementById(collection, id) {
    if (!angular.isArray(collection) || !collection.length) {
        return null;
    }

    id = parseInt(id, 10);
    return collection.find(function (element) {
        return element.id === id;
    })
}

function diff(arr1, arr2) {
    return arr1.filter(function (i) {
        return arr2.indexOf(i) < 0;
    });
}