javascript对象的深度比较方法

/**
 * 深度比较两个对象是否相等
 * @method compare
 * @param oldData 需要比较的值
 * @param newData 需要比较的值
 * @return {Boolean} 判断后的结果
 */
export const compare = function (oldData, newData) {
  if (oldData === newData) return true;
  const arg = Array.prototype.slice.call(arguments);
  const objCall = (obj, string) => Object.prototype.toString.call(obj) === `[object ${string}]`;
  if (arg.every(obj => objCall(obj, 'Object')) && Object.keys(oldData).length === Object.keys(newData).length) {
    for (const key in oldData) { if (oldData.hasOwnProperty(key) && !compare(oldData[key], newData[key])) return false; }
  } else if (arg.every(obj => objCall(obj, 'Array')) && oldData.length === newData.length) {
    for (const key in oldData) { if (!compare(oldData[key], newData[key])) return false; }
  } else {
    return false;
  }
  return true;
};

调用：

const obj = {};

const arr = [];

const result = compare(obj,arr);  // false;

对象深度比较，简单又好吃；