javascript - 我没有使用的阵列如何更新？

Question

这是我的功能:

function RemoveOutputKeys(array){
  var temp = array;
  for(var object in temp){
    delete temp[object]['statusCode']
    delete temp[object]['statusResponse']
  } 
  console.log(array)
  if(temp == array)
    console.log("how is this possible?!?!!?!?!")
  return temp
}

这是我提供的输入，

array = [{'statusCode':400},{'statusCode':200}]

temp 更新是有意义的，但我不希望 array 更新。我该如何解决这个问题？

谢谢

Answer 1

使用Array.prototype.filter()代替for in

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/filter

The filter() method creates a new array with all elements that pass the test implemented by the provided function.

function RemoveOutputKeys(array) {
  return array.filter(function(myArray) {
      if (!myArray['statusCode'] && !myArray['statusResponse']) {
          return myArray;
      }
  });
}

var originalArray = [{'statusCode':400}, {'statusCode':200}, {'test': 'test'}];

var tempArray = RemoveOutputKeys(originalArray);

console.log(originalArray, tempArray);

https://jsfiddle.net/3kbypvcs/2/