Function copy

test/3rdparty/angular-1.2.5.js:801–840

* @ngdoc function * @name angular.copy * @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 destination is provided, all of its elements (for array) or pr

(source, destination)

 </doc:example>
 */
function copy(source, destination){
  if (isWindow(source) || isScope(source)) {
    throw ngMinErr('cpws',
      "Can't copy! Making copies of Window or Scope instances is not supported.");
  }

  if (!destination) {
    destination = source;
    if (source) {
      if (isArray(source)) {
        destination = copy(source, []);
      } else if (isDate(source)) {
        destination = new Date(source.getTime());
      } else if (isRegExp(source)) {
        destination = new RegExp(source.source);
      } else if (isObject(source)) {
        destination = copy(source, {});
      }
    }
  } else {
    if (source === destination) throw ngMinErr('cpi',
      "Can't copy! Source and destination are identical.");
    if (isArray(source)) {
      destination.length = 0;
      for ( var i = 0; i < source.length; i++) {
        destination.push(copy(source[i]));
      }
    } else {
      var h = destination.$$hashKey;
      forEach(destination, function(value, key){
        delete destination[key];
      });
      for ( var key in source) {
        destination[key] = copy(source[key]);
      }
      setHashKey(destination,h);
    }
  }
  return destination;
}

/**
 * Create a shallow copy of an object