javascript - For 循环变量索引-6ren

javascript - For 循环变量索引

转载作者：行者123 更新时间：2023-11-27 23:04:26

我正在尝试调用一个已经声明的变量。我在 for 循环 中调用它来执行一些基本的 console.log() 迭代测试，以便我知道我的目标是什么以及正在渲染什么。我不想在 for 循环中再次写出选择器的语法(这是这个问题的起源)。

有没有办法在for循环中调用变量并将迭代编号附加到它。

请考虑以下代码:

var $inputBoxes =  $('.rrSumColTotal').closest('table').find('tr td input[type=text]').not(':first');

        for (i = 0, z = $inputBoxes.length; i < z; i++){
            console.log($inputBoxes.attr("class").toString());
        }

我希望迭代的每个项目都显示在控制台中的新行上，而不是像当前那样全部显示在一行中。有关其他上下文，请考虑此代码，它会自动将迭代项放在新行上。

for (i = 0, z = $("area[data-mkey]").length; i < z; i++) {
  var logThis = $("area[data-mkey]:eq('" + i + "')").attr("coords").split(",").splice(0, 4).toString();
  //console.log(logThis);
}

所以，理想情况下我正在寻找类似 $inputBoxes[i] 或 $inputBoxes.index(i) 但这些不起作用。

var $inputBoxes = $('.rrSumColTotal').closest('table').find('tr td input[type=text]').not(':first');
var $gridRows = $('.rrSumColTotal').closest('table').find('tr');

//Create an array of TD amount per row

$.each($inputBoxes, function(i) {
  $inputBoxes.addClass("targetInput_" + i);
});

//console.log($inputBoxes.length);
for (i = 0, z = $inputBoxes.length; i < z; i++) {
  console.log($inputBoxes.attr("class").toString());
}

<div class="rrQuestionContainer">
  <div></div>
  <span class="mrQuestionText" style=""><span class="sumcol"></span>Think about your LAST 10 CLL patients who were prescribed a 2nd line CLL treatment, are patients with 17p Deletion, and fit each bucket below. How many were treated with the following
  in the 2nd line? Responses must add up to at least 10 across all columns, but may add to more if combination therapy was used.</span>
  <div></div>
  <span style="">
								<table summary="<span class='sumcol'></span>Think about your LAST 10 CLL patients who were prescribed a 2nd line CLL treatment, are patients with 17p Deletion, and fit each bucket below. How many were treated with the following in the 2nd line?
  Responses must add up to at least 10 across all columns, but may add to more if combination therapy was used." class="mrQuestionTable" style="width: 925px;">
  <tbody>
    <tr>
      <td id="Cell.0.0">
      </td>
      <td id="Cell.1.0" class="mrGridQuestionText" style="width: 150px;">
        <div></div>
        <span class="mrQuestionText" style=""><center><b>2<sup>nd</sup> Line CLL Patients Who:</b> Has 17p Deletion, has NOT received Imbruvica (ibrutinib) or Zydelig (idelalisib) in the 1st line</center></span>
      </td>
      <td id="Cell.2.0" class="mrGridQuestionText" style="width: 150px;">
        <div></div>
        <span class="mrQuestionText" style=""><center><b>2<sup>nd</sup> Line CLL Patients Who:</b> Has 17p Deletion, has received Imbruvica (ibrutinib) in the 1st line, but NOT Zydelig (idelalisib) in the 1<sup>st</sup> line</center></span>
      </td>
      <td id="Cell.3.0" class="mrGridQuestionText" style="width: 150px;">
        <div></div>
        <span class="mrQuestionText" style=""><center><b>2<sup>nd</sup> Line CLL Patients Who:</b> Has 17p Deletion, has received Zydelig (idelalisib) in the 1st line, but NOT Imbruvica (ibrutinib) in the 1<sup>st</sup> line</center></span>
      </td>
      <td id="Cell.4.0" class="mrGridQuestionText" style="width: 150px;">
        <div></div>
        <span class="mrQuestionText" style=""><center><b>2<sup>nd</sup> Line CLL Patients Who:</b> Has 17p Deletion, has received Imbruvica (ibrutinib) AND Zydelig (idelalisib) in the 1<sup>st</sup> line</center></span>
      </td>

    </tr>
    <tr>
      <td id="Cell.0.1" class="mrGridCategoryText" style="text-Align: Left;vertical-align: Middle;background-color: #D8D8D8;width: 300px;border-color: black;border-width: 1px;border-left-style: Solid;border-right-style: Solid;border-top-style: Solid;border-bottom-style: Solid;">
        <span class="mrQuestionText" style="font-size: 9pt;"><b>Antibody infusions</b>:<br> Rituxan (rituximab),<br>Gazyva (obinutuzumab), etc.</span>
      </td>
      <td id="Cell.1.1" style="text-Align: Center;vertical-align: Middle;background-color: #D8D8D8;width: 120px;border-color: black;border-width: 1px;border-left-style: Solid;border-right-style: Solid;border-top-style: Solid;border-bottom-style: Solid;">
        <div></div>
        <span style="">
												<div></div>
												<input type="text" name="_QPageB1_QGRB1_Q__01_QB1A" id="_Q0_Q0_Q0" class="mrEdit" autocomplete="on" style="width: 3em;" maxlength="2" value="">
											</span>
      </td>
      <td id="Cell.2.1" style="text-Align: Center;vertical-align: Middle;background-color: #D8D8D8;width: 120px;border-color: black;border-width: 1px;border-left-style: Solid;border-right-style: Solid;border-top-style: Solid;border-bottom-style: Solid;">
        <div></div>
        <span style="">
												<div></div>
												<input type="text" name="_QPageB1_QGRB1_Q__01_QB1B" id="_Q0_Q0_Q1" class="mrEdit targetInput_0 rowA" autocomplete="on" style="width: 3em;" maxlength="2" value="">
											</span>
      </td>
      <td id="Cell.3.1" style="text-Align: Center;vertical-align: Middle;background-color: #D8D8D8;width: 120px;border-color: black;border-width: 1px;border-left-style: Solid;border-right-style: Solid;border-top-style: Solid;border-bottom-style: Solid;">
        <div></div>
        <span style="">
												<div></div>
												<input type="text" name="_QPageB1_QGRB1_Q__01_QB1C" id="_Q0_Q0_Q2" class="mrEdit targetInput_1 rowA" autocomplete="on" style="width: 3em;" maxlength="2" value="">
											</span>
      </td>
      <td id="Cell.4.1" style="text-Align: Center;vertical-align: Middle;background-color: #D8D8D8;width: 120px;border-color: black;border-width: 1px;border-left-style: Solid;border-right-style: Solid;border-top-style: Solid;border-bottom-style: Solid;">
        <div></div>
        <span style="">
												<div></div>
												<input type="text" name="_QPageB1_QGRB1_Q__01_QB1D" id="_Q0_Q0_Q3" class="mrEdit targetInput_2 rowA" autocomplete="on" style="width: 3em;" maxlength="2" value="">
											</span>
      </td>

    </tr>
    <tr>
      <td id="Cell.0.2" class="mrGridCategoryText" style="text-Align: Left;vertical-align: Middle;background-color: #F8F8F8;width: 300px;border-color: black;border-width: 1px;border-left-style: Solid;border-right-style: Solid;border-top-style: Solid;border-bottom-style: Solid;">
        <span class="mrQuestionText" style="font-size: 9pt;"><b>Chemo:</b> Fludara (fludarabine), Treanda (bendamustine), etc.</span>
      </td>
      <td id="Cell.1.2" style="text-Align: Center;vertical-align: Middle;background-color: #F8F8F8;width: 120px;border-color: black;border-width: 1px;border-left-style: Solid;border-right-style: Solid;border-top-style: Solid;border-bottom-style: Solid;">
        <div></div>
        <span style="">
												<div></div>
												<input type="text" name="_QPageB1_QGRB1_Q__02_QB1A" id="_Q0_Q1_Q0" class="mrEdit targetInput_3 rowA" autocomplete="on" style="width: 3em;" maxlength="2" value="">
											</span>
      </td>
      <td id="Cell.2.2" style="text-Align: Center;vertical-align: Middle;background-color: #F8F8F8;width: 120px;border-color: black;border-width: 1px;border-left-style: Solid;border-right-style: Solid;border-top-style: Solid;border-bottom-style: Solid;">
        <div></div>
        <span style="">
												<div></div>
												<input type="text" name="_QPageB1_QGRB1_Q__02_QB1B" id="_Q0_Q1_Q1" class="mrEdit targetInput_4 rowA" autocomplete="on" style="width: 3em;" maxlength="2" value="">
											</span>
      </td>
      <td id="Cell.3.2" style="text-Align: Center;vertical-align: Middle;background-color: #F8F8F8;width: 120px;border-color: black;border-width: 1px;border-left-style: Solid;border-right-style: Solid;border-top-style: Solid;border-bottom-style: Solid;">
        <div></div>
        <span style="">
												<div></div>
												<input type="text" name="_QPageB1_QGRB1_Q__02_QB1C" id="_Q0_Q1_Q2" class="mrEdit targetInput_5 rowA" autocomplete="on" style="width: 3em;" maxlength="2" value="">
											</span>
      </td>
      <td id="Cell.4.2" style="text-Align: Center;vertical-align: Middle;background-color: #F8F8F8;width: 120px;border-color: black;border-width: 1px;border-left-style: Solid;border-right-style: Solid;border-top-style: Solid;border-bottom-style: Solid;">
        <div></div>
        <span style="">
												<div></div>
												<input type="text" name="_QPageB1_QGRB1_Q__02_QB1D" id="_Q0_Q1_Q3" class="mrEdit targetInput_6 rowA" autocomplete="on" style="width: 3em;" maxlength="2" value="">
											</span>
      </td>

    </tr>
    <tr>
      <td id="Cell.0.3" class="mrGridCategoryText" style="text-Align: Left;vertical-align: Middle;background-color: #D8D8D8;width: 300px;border-color: black;border-width: 1px;border-left-style: Solid;border-right-style: Solid;border-top-style: Solid;border-bottom-style: Solid;">
        <span class="mrQuestionText" style="font-size: 9pt;"><b>Antibody and Chemo</b> : "FCR" (fludarabine/ cyclophosphamide/ rituximab) or BR ((bendamustine and rituximab)</span>
      </td>
      <td id="Cell.1.3" style="text-Align: Center;vertical-align: Middle;background-color: #D8D8D8;width: 120px;border-color: black;border-width: 1px;border-left-style: Solid;border-right-style: Solid;border-top-style: Solid;border-bottom-style: Solid;">
        <div></div>
        <span style="">
												<div></div>
												<input type="text" name="_QPageB1_QGRB1_Q__03_QB1A" id="_Q0_Q2_Q0" class="mrEdit targetInput_7 rowA" autocomplete="on" style="width: 3em;" maxlength="2" value="">
											</span>
      </td>
      <td id="Cell.2.3" style="text-Align: Center;vertical-align: Middle;background-color: #D8D8D8;width: 120px;border-color: black;border-width: 1px;border-left-style: Solid;border-right-style: Solid;border-top-style: Solid;border-bottom-style: Solid;">
        <div></div>
        <span style="">
												<div></div>
												<input type="text" name="_QPageB1_QGRB1_Q__03_QB1B" id="_Q0_Q2_Q1" class="mrEdit targetInput_8 rowA" autocomplete="on" style="width: 3em;" maxlength="2" value="">
											</span>
      </td>
      <td id="Cell.3.3" style="text-Align: Center;vertical-align: Middle;background-color: #D8D8D8;width: 120px;border-color: black;border-width: 1px;border-left-style: Solid;border-right-style: Solid;border-top-style: Solid;border-bottom-style: Solid;">
        <div></div>
        <span style="">
												<div></div>
												<input type="text" name="_QPageB1_QGRB1_Q__03_QB1C" id="_Q0_Q2_Q2" class="mrEdit targetInput_9 rowA" autocomplete="on" style="width: 3em;" maxlength="2" value="">
											</span>
      </td>
      <td id="Cell.4.3" style="text-Align: Center;vertical-align: Middle;background-color: #D8D8D8;width: 120px;border-color: black;border-width: 1px;border-left-style: Solid;border-right-style: Solid;border-top-style: Solid;border-bottom-style: Solid;">
        <div></div>
        <span style="">
												<div></div>
												<input type="text" name="_QPageB1_QGRB1_Q__03_QB1D" id="_Q0_Q2_Q3" class="mrEdit targetInput_10 rowA" autocomplete="on" style="width: 3em;" maxlength="2" value="">
											</span>
      </td>

    </tr>
    <tr>
      <td id="Cell.0.4" class="mrGridCategoryText" style="text-Align: Left;vertical-align: Middle;background-color: #F8F8F8;width: 300px;border-color: black;border-width: 1px;border-left-style: Solid;border-right-style: Solid;border-top-style: Solid;border-bottom-style: Solid;">
        <span class="mrQuestionText" style="font-size: 9pt;"><b>Oral Oncolytic</b>: Imbruvica</span>
      </td>
      <td id="Cell.1.4" style="text-Align: Center;vertical-align: Middle;background-color: #F8F8F8;width: 120px;border-color: black;border-width: 1px;border-left-style: Solid;border-right-style: Solid;border-top-style: Solid;border-bottom-style: Solid;">
        <div></div>
        <span style="">
												<div></div>
												<input type="text" name="_QPageB1_QGRB1_Q__04_QB1A" id="_Q0_Q3_Q0" class="mrEdit targetInput_11 rowA" autocomplete="on" style="width: 3em;" maxlength="2" value="">
											</span>
      </td>
      <td id="Cell.2.4" style="text-Align: Center;vertical-align: Middle;background-color: #F8F8F8;width: 120px;border-color: black;border-width: 1px;border-left-style: Solid;border-right-style: Solid;border-top-style: Solid;border-bottom-style: Solid;">
        <div></div>
        <span style="">
												<div></div>
												<input type="text" name="_QPageB1_QGRB1_Q__04_QB1B" id="_Q0_Q3_Q1" class="mrEdit targetInput_12 rowA" autocomplete="on" style="width: 3em;" maxlength="2" value="">
											</span>
      </td>
      <td id="Cell.3.4" style="text-Align: Center;vertical-align: Middle;background-color: #F8F8F8;width: 120px;border-color: black;border-width: 1px;border-left-style: Solid;border-right-style: Solid;border-top-style: Solid;border-bottom-style: Solid;">
        <div></div>
        <span style="">
												<div></div>
												<input type="text" name="_QPageB1_QGRB1_Q__04_QB1C" id="_Q0_Q3_Q2" class="mrEdit targetInput_13 rowA" autocomplete="on" style="width: 3em;" maxlength="2" value="">
											</span>
      </td>
      <td id="Cell.4.4" style="text-Align: Center;vertical-align: Middle;background-color: #F8F8F8;width: 120px;border-color: black;border-width: 1px;border-left-style: Solid;border-right-style: Solid;border-top-style: Solid;border-bottom-style: Solid;">
        <div></div>
        <span style="">
												<div></div>
												<input type="text" name="_QPageB1_QGRB1_Q__04_QB1D" id="_Q0_Q3_Q3" class="mrEdit targetInput_14 rowA" autocomplete="on" style="width: 3em;" maxlength="2" value="">
											</span>
      </td>

    </tr>
    <tr>
      <td id="Cell.0.5" class="mrGridCategoryText" style="text-Align: Left;vertical-align: Middle;background-color: #D8D8D8;width: 300px;border-color: black;border-width: 1px;border-left-style: Solid;border-right-style: Solid;border-top-style: Solid;border-bottom-style: Solid;">
        <span class="mrQuestionText" style="font-size: 9pt;"><b>Oral Oncolytic</b>: Zydelig</span>
      </td>
      <td id="Cell.1.5" style="text-Align: Center;vertical-align: Middle;background-color: #D8D8D8;width: 120px;border-color: black;border-width: 1px;border-left-style: Solid;border-right-style: Solid;border-top-style: Solid;border-bottom-style: Solid;">
        <div></div>
        <span style="">
												<div></div>
												<input type="text" name="_QPageB1_QGRB1_Q__05_QB1A" id="_Q0_Q4_Q0" class="mrEdit targetInput_15 rowA" autocomplete="on" style="width: 3em;" maxlength="2" value="">
											</span>
      </td>
      <td id="Cell.2.5" style="text-Align: Center;vertical-align: Middle;background-color: #D8D8D8;width: 120px;border-color: black;border-width: 1px;border-left-style: Solid;border-right-style: Solid;border-top-style: Solid;border-bottom-style: Solid;">
        <div></div>
        <span style="">
												<div></div>
												<input type="text" name="_QPageB1_QGRB1_Q__05_QB1B" id="_Q0_Q4_Q1" class="mrEdit targetInput_16 rowA" autocomplete="on" style="width: 3em;" maxlength="2" value="">
											</span>
      </td>
      <td id="Cell.3.5" style="text-Align: Center;vertical-align: Middle;background-color: #D8D8D8;width: 120px;border-color: black;border-width: 1px;border-left-style: Solid;border-right-style: Solid;border-top-style: Solid;border-bottom-style: Solid;">
        <div></div>
        <span style="">
												<div></div>
												<input type="text" name="_QPageB1_QGRB1_Q__05_QB1C" id="_Q0_Q4_Q2" class="mrEdit targetInput_17 rowA" autocomplete="on" style="width: 3em;" maxlength="2" value="">
											</span>
      </td>
      <td id="Cell.4.5" style="text-Align: Center;vertical-align: Middle;background-color: #D8D8D8;width: 120px;border-color: black;border-width: 1px;border-left-style: Solid;border-right-style: Solid;border-top-style: Solid;border-bottom-style: Solid;">
        <div></div>
        <span style="">
												<div></div>
												<input type="text" name="_QPageB1_QGRB1_Q__05_QB1D" id="_Q0_Q4_Q3" class="mrEdit targetInput_18 rowA" autocomplete="on" style="width: 3em;" maxlength="2" value="">
											</span>
      </td>

    </tr>
    <tr>
      <td id="Cell.0.6" class="mrGridCategoryText" style="text-Align: Left;vertical-align: Middle;background-color: #F8F8F8;width: 300px;border-color: black;border-width: 1px;border-left-style: Solid;border-right-style: Solid;border-top-style: Solid;border-bottom-style: Solid;">
        <table style="vertical-align: middle; border-collapse: collapse; border: none;">
          <tbody>
            <tr>
              <td style="min-width: 60%; vertical-align: top;">

                Other(specify)
              </td>
              <td style="min-width: auto; vertical-align: top;" class="moved_GRB1_Other">
                <input type="text" name="_QPageB1_QB1__OS__1" id="_Q1" class="mrEdit targetInput_19 rowA" autocomplete="on" style="margin-left: 1em;width: 8em;" maxlength="1024" value="">
              </td>
            </tr>
          </tbody>
        </table>
      </td>
      <td id="Cell.1.6" style="text-Align: Center;vertical-align: Middle;background-color: #F8F8F8;width: 120px;border-color: black;border-width: 1px;border-left-style: Solid;border-right-style: Solid;border-top-style: Solid;border-bottom-style: Solid;">
        <div></div>
        <span style="">
												<div></div>
												<input type="text" name="_QPageB1_QGRB1_Q__Other_QB1A" id="_Q0_Q5_Q0" class="mrEdit targetInput_20 rowB rowA" autocomplete="on" style="width: 3em;" maxlength="2" value="">
											</span>
      </td>
      <td id="Cell.2.6" style="text-Align: Center;vertical-align: Middle;background-color: #F8F8F8;width: 120px;border-color: black;border-width: 1px;border-left-style: Solid;border-right-style: Solid;border-top-style: Solid;border-bottom-style: Solid;">
        <div></div>
        <span style="">
												<div></div>
												<input type="text" name="_QPageB1_QGRB1_Q__Other_QB1B" id="_Q0_Q5_Q1" class="mrEdit targetInput_21 rowA" autocomplete="on" style="width: 3em;" maxlength="2" value="">
											</span>
      </td>
      <td id="Cell.3.6" style="text-Align: Center;vertical-align: Middle;background-color: #F8F8F8;width: 120px;border-color: black;border-width: 1px;border-left-style: Solid;border-right-style: Solid;border-top-style: Solid;border-bottom-style: Solid;">
        <div></div>
        <span style="">
												<div></div>
												<input type="text" name="_QPageB1_QGRB1_Q__Other_QB1C" id="_Q0_Q5_Q2" class="mrEdit targetInput_22 rowA" autocomplete="on" style="width: 3em;" maxlength="2" value="">
											</span>
      </td>
      <td id="Cell.4.6" style="text-Align: Center;vertical-align: Middle;background-color: #F8F8F8;width: 120px;border-color: black;border-width: 1px;border-left-style: Solid;border-right-style: Solid;border-top-style: Solid;border-bottom-style: Solid;">
        <div></div>
        <span style="">
												<div></div>
												<input type="text" name="_QPageB1_QGRB1_Q__Other_QB1D" id="_Q0_Q5_Q3" class="mrEdit targetInput_23 rowA" autocomplete="on" style="width: 3em;" maxlength="2" value="">
											</span>
      </td>

    </tr>
    <tr>
      <td id="Cell.0.6" class="mrGridCategoryText" style="text-Align: Left;vertical-align: Middle;background-color: #F8F8F8;width: 300px;border-color: black;border-width: 1px;border-left-style: Solid;border-right-style: Solid;border-top-style: Solid;border-bottom-style: Solid;"><span class="rrSumColTotal">0</span>
      </td>
      <td id="Cell.1.6" style="text-align: center; vertical-align: middle; width: 120px; border: 1px solid black; background-color: rgb(170, 204, 238);" rowspan=""><span id="spRunningTotal1" class="rrRunningTotal" data-columnordinal="1">0</span>
      </td>




    </tr>
  </tbody>
  </table>
  </span>
</div>

最佳答案

在控制台中实现所需功能和动态一对一变量比率访问的 jQuery 方法是 .eq()。

var $inputBoxes = $('.rrSumColTotal').closest('table').find('tr td input[type=text]').not(':first');
var $gridRows = $('.rrSumColTotal').closest('table').find('tr');

//Create an array of TD amount per row

$.each($inputBoxes, function (i) {
    $inputBoxes.eq(i).addClass("targetInput_" + i);
});

//console.log($inputBoxes.length);
for (i = 0, z = $inputBoxes.length; i < z; i++){
    console.log($inputBoxes.eq(i).attr("class").toString());
}

jQuery Documentation

描述:将匹配元素集合减少到指定索引处的元素。

关于javascript - For 循环变量索引，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/36723470/

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JavaScript 变量 = 变量
在 JavaScript 中有没有办法让一个变量总是等于一个变量？喜欢var1 = var2但是当var2更新，也是var1 . 例子 var var1 = document.getElementBy
python - 如何阅读此 python 代码？变量 1 = 变量 2 == 变量 3
我正在努力理解这代表什么 var1 = var2 == var3 我的猜测是这等同于: if (var2 == var3): var1 = var2 最佳答案赋值 var1 = var2
php - 变量 $_GET 变量
这个问题已经有答案了: What does the PHP error message "Notice: Use of undefined constant" mean? (2 个回答) 已关闭 8
MySQL:变量=变量+select语句
我在临时表中有几条记录，我想从每条记录中获取一个值并将其添加到一个变量中，例如 color | caption -------------------------------- re
linux - 如何将原始字符串转换为变量(变量 --> $变量)？
如何将字符串转为变量(字符串变量--> $variable)？或者用逗号分隔的变量列表然后转换为实际变量。我有 2 个文件: 列名文件行文件我需要根据字符串匹配行文件中的整行，并根据列名文件命
PHP:来自与变量(变量-变量)连接的字符串的新变量
我有一个我无法解决的基本 php 问题，我也想了解为什么! $upperValueCB = 10; $passNodeMatrixSource = 'CB'; $topValue= '$uppe
php 变量 = 变量 1 ||变量2
这可能吗？ php $variable = $variable1 || $variable2? 如果 $variable1 为空则使用 $variable2 是否存在类似的东西？最佳答案 PHP 5
perl - for 循环不会修改 `my` 变量，但会修改 `our` 变量
在 Perl 5.20 中，for 循环似乎能够修改模块作用域的变量，但不能修改父作用域中的词法变量。 #!/usr/bin/env perl use strict; use warnings; ou
JavaScript: 变量 = 变量.concat(另一个变量);
为什么这不起作用: var variable; variable = variable.concat(variable2); $('#lunk').append(variable) 我无法弄清楚这一点
c++ - 指针的大小(*变量 VS 变量)
根据我的理解，在32位机器上，指针的sizeof是32位(4字节)，而在64位机器上，它是8字节。无论它们指向什么数据类型，它们都有固定的大小。我的计算机在 64 位上运行，但是当我打印包含 * 的大
java - 变量+=值和变量=变量+值之间的区别；
例如: int a = 10; a += 1.5; 这运行得很完美，但是 a = a+1.5; 此作业表示类型不匹配:无法从 double 转换为 int。所以我的问题是:+= 运算符和= 运算符
MySQL 语法错误 |变量 = 变量 + 整数
您好，我写了这个 MySQL 存储过程，但我一直收到这个语法错误 #1064 - You have an error in your SQL syntax; check the manual that
swift - 如果(变量 == 变量 + 5)
我试图在我的场景中显示特定的奖牌，这取决于你的高分是基于关卡的目标。 // Get Medal Colour if levelHighscore goalScore { sc
c++ - 变量 = !!变量与变量 =(变量!= 0)
我必须维护相当古老的 Visual C++ 源代码的大型代码库。我发现代码如下: bIsOk = !!m_ptr->isOpen(some Parameters) bIsOk的数据类型是bool，is
php - Javascript 变量，发送到 PHP 变量
我有一个从 MySQL 数据库中提取的动态产品列表。在 list 上有一个立即联系按钮，我正在使用一个 jquery Modal 脚本，它会弹出一个表单。我的问题是尝试将产品信息变量传递给该弹出窗
c++ - 类型(变量)与(类型)变量
这个问题在这里已经有了答案: 关闭 10 年前。 Possible Duplicate: What is the difference between (type)value and type(va
javascript - 变量 === 未定义与 typeof 变量 === "undefined"
jQuery Core Style Guidelines建议两种不同的方法来检查变量是否已定义。全局变量:typeof variable === "undefined" 局部变量:variable
jquery - 动态(变量)变量(如 php 中的？)
这个问题已经有答案了: 已关闭11 年前。 Possible Duplicate: “Variable” Variables in Javascript? 我想肯定有一种方法可以在 JavaScrip
c# - 变量 1 = 变量 2 = 真；优点缺点？
在语句中使用多重赋值有什么优点或缺点吗？在简单的例子中 var1 = var2 = true; 赋值是从右到左的(我相信 C# 中的所有赋值都是如此，而且可能是 Java，尽管我没有检查后者)。但是，

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javascript - For 循环变量索引