Function copy

OpenReservation/wwwroot/Scripts/angular.js:837–970

* @ngdoc function * @name angular.copy * @module ng * @kind function * * @description * Creates a deep copy of `source`, which should be an object or an array. * * * If no destination is supplied, a copy of the object or array is created. * * If a destina

(source, destination)

     </example>
     */
    function copy(source, destination) {
        var stackSource = [];
        var stackDest = [];

        if (destination) {
            if (isTypedArray(destination) || isArrayBuffer(destination)) {
                throw ngMinErr('cpta', "Can't copy! TypedArray destination cannot be mutated.");
            }
            if (source === destination) {
                throw ngMinErr('cpi', "Can't copy! Source and destination are identical.");
            }

            // Empty the destination object
            if (isArray(destination)) {
                destination.length = 0;
            } else {
                forEach(destination,
                    function (value, key) {
                        if (key !== '$$hashKey') {
                            delete destination[key];
                        }
                    });
            }

            stackSource.push(source);
            stackDest.push(destination);
            return copyRecurse(source, destination);
        }

        return copyElement(source);

        function copyRecurse(source, destination) {
            var h = destination.$$hashKey;
            var result, key;
            if (isArray(source)) {
                for (var i = 0, ii = source.length; i < ii; i++) {
                    destination.push(copyElement(source[i]));
                }
            } else if (isBlankObject(source)) {
                // createMap() fast path --- Safe to avoid hasOwnProperty check because prototype chain is empty
                for (key in source) {
                    destination[key] = copyElement(source[key]);
                }
            } else if (source && typeof source.hasOwnProperty === 'function') {
                // Slow path, which must rely on hasOwnProperty
                for (key in source) {
                    if (source.hasOwnProperty(key)) {
                        destination[key] = copyElement(source[key]);
                    }
                }
            } else {
                // Slowest path --- hasOwnProperty can't be called as a method
                for (key in source) {
                    if (hasOwnProperty.call(source, key)) {
                        destination[key] = copyElement(source[key]);
                    }
                }
            }