JavaScript keys：获取对象中所有属性名称的数组

Posted 2021-05-20

//do the same thing as the Perl "keys" subroutine
 keys : function  (o) {
    var accumulator = [];
    for (var propertyName in o) {
      arr.push(propertyName);
      }
    return accumulator;
  }

//get values instead of keys
 values : function (o) {
    var accumulator = [];
    for (var propertyName in o) {
      arr.push(o[propertyName]);
      }
    return accumulator;
}