如何清空和删除带参数的数组？

Question

问题

我无法使用 s 参数清空数组
我不能delete一个带有deleteThis参数的数组

sentences = {
  all: [
    //1,000s of Sentences
    "This sentence meets all conditions.",
    "This sentence meets all conditions.",
    "This sentence failed.",
    "This sentence failed.",
    "This sentence meets all conditions.",
    "This sentence failed."
  ],
  success: [],
  failed: [],
  moveTo_then_Delete: []
}




function Divide_And_Empty(s, success, failed, deleteThis, regEx) {
  s.filter(function(str) {
    key = regEx.test(str)
    if (key) {
      success.push(str)
    } else {
      failed.push(str)
      deleteThis.push(str)
    }
  });

  //The code works correctly
  //All the way up until I try to empty and/or delete an array with parameter
  s = []
  delete deleteThis
}
Divide_And_Empty(sentences.all, sentences.success, sentences.failed, sentences.moveTo_then_Delete, /meets/)



document.write("<pre>" + JSON.stringify(sentences, null, 2) + "</pre>");

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

Answer 1

在您的示例中，s 指的是您在参数中传递的数组。你只能改变这个数组。

如果你想从名为 s 的数组中删除所有元素，那么你应该使用

s.length = 0;

或

s.splice(0, s.length) 而不是 s = []:

sentences = {
  all: [
    //1,000s of Sentences
    "This sentence meets all conditions.",
    "This sentence meets all conditions.",
    "This sentence failed.",
    "This sentence failed.",
    "This sentence meets all conditions.",
    "This sentence failed."
  ],
  success: [],
  failed: [],
}

function Divide_And_Empty(s, success, failed, regEx) {
  s.filter(function(str) {
    key = regEx.test(str)
    if (key) {
      success.push(str)
    } else {
      failed.push(str)
    }
  });

  s.length = 0; // or s.splice(0, s.length);
}

Divide_And_Empty(sentences.all, sentences.success, sentences.failed, /meets/);

document.write("<pre>" + JSON.stringify(sentences, null, 2) + "</pre>");

如何清空和删除带参数的数组？

How to empty and delete an array with a parameter?

javascript

jquery-mobile

问题