// 数据合并
export function mergeRecursive(source, target) { 
  for (var p in target) {
    try {
      if (target[p].constructor == Object) {
        source[p] = mergeRecursive(source[p], target[p]);
      } else {
        source[p] = target[p];
      }
    } catch (e) {
      source[p] = target[p];
    }
  } 

  // source = target
  // for (var p in target) {
  //   try {
  //     if (target[p].constructor == Object) {
  //       source[p] = mergeRecursive(source[p], target[p]);
  //     } else {
  //       source[p] = target[p];
  //     }
  //   } catch (e) {
  //     source[p] = target[p];
  //   }
  // }
  return source;
};