Question

每次单击th元素时，带有变量的函数（单击的th元素的文本）都存储在数组中。但是，不是值（1,2或3等），而是存储变量的名称（“列”）。

如何存储该值而不是变量名？

在下面的示例中，您将看到在控制台中，每次单击th元素时都会存储变量名“column”。

var recordedFunctions = [];
$(document).on("click", "th", function() {
  var column = this.innerHTML;
  recordedFunctions.push(function() {sel(column)});
  console.log(recordedFunctions.toString());
  alert(column);
});

function runRecordedActions() {
  console.log(recordedFunctions.toString());
  for (i = 0; i < recordedFunctions.length; i++) {
    recordedFunctions[i]();
  }
}

function sel(v) {
  alert(v);
}

table th {
  height: 25px;
  width: 30px;
  border: 1px solid #757575;
  text-align: center;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<table>
  <thead>
    <tr>
      <th>1</th>
      <th>2</th>
      <th>3</th>
      <th>4</th>
      <th>5</th>
      <th>6</th>
      <th>7</th>
      <th>8</th>
      <th>9</th>
    </tr>
  </thead>
</table>
<br>

<button type="button" onClick="runRecordedActions()">RUN</button>

Answer 1

您还需要更改循环和功能。我添加了一个test（）并将其推入一个数组中。这是工作代码：

var recordedFunctions = [];
function test(column) {
    return column;
}
$(document).on("click", "th", function() {
  var column = this.innerHTML;
  recordedFunctions.push(test(column));

  alert(recordedFunctions);
  console.log(recordedFunctions.toString());
  alert(column);
});

function runRecordedActions() {

  for (var key in recordedFunctions) {

    console.log(recordedFunctions[key]());
  }
}

function sel(v) {
  alert(v);
}

Answer 2

奇怪的是，在stackoverflow片段中，无法获取值存储 recordedFunctions数组，我们可以在fiddler中获取值。检查下面的代码段以及fiddler，它会在触发run按钮时显示所有点击的值。

var recordedFunctions = [];
$(document).on("click", "th", function() {
  var column = this.innerHTML;
  recordedFunctions.push(function() {sel(column)});
  console.log(recordedFunctions[recordedFunctions.length-1].toString());
  alert(column);
});

function runRecordedActions() {
  var output='Values are:';
  for (i = 0; i < recordedFunctions.length; i++) {
    output += (' ' + recordedFunctions[i].toString());
  }
  alert(output);
}

function sel(v) {
  alert(v);
}

table th {
  height: 25px;
  width: 30px;
  border: 1px solid #757575;
  text-align: center;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<table>
  <thead>
    <tr>
      <th>1</th>
      <th>2</th>
      <th>3</th>
      <th>4</th>
      <th>5</th>
      <th>6</th>
      <th>7</th>
      <th>8</th>
      <th>9</th>
    </tr>
  </thead>
</table>
<br>

<button type="button" onClick="runRecordedActions()">RUN</button>

如何在将变量添加到数组中时将变量传递给函数

2 个答案: