javascript - 使用 jQuery 动态创建对象

Question

我想动态创建对象数组。

该数组将被称为“组”。它将包含未知数量的对象(这些是组名称)，这些对象将由元素的 ID 确定。每个对象将包含未知数量的属性(这些是组属性)，这些属性将由 div 的内部文本确定，它们的值将由另一个 的内部文本确定div.

我知道如何使用 .each() 和 .attr('ID') 和 .text() 获取每个值>。我只是不知道如何创建对象数组。

// Example HTML 
<div id="england">
    <div class="property">health</div>
    <div class="count">3</div>
    <div class="property">education</div>
    <div class="count">1</div>
    <div class="property">entertainment</div>
    <div class="count">12</div>
</div>
<div id="scotland">
    <div class="property">geography</div>
    <div class="count">5</div>
    <div class="property">history</div>
    <div class="count">2</div>
</div>
<div id="wales">
    <div class="property">illustration</div>
    <div class="count">4</div>
    <div class="property">business</div>
    <div class="count">6</div>
    <div class="property">fashion</div>
    <div class="count">3</div>
</div>

.

// Example JSON output of the 'groups' array
{  
    "england":{  
        "health":"3",
        "education":"1",
        "entertainment":"12"
    },
    "scotland":{  
        "geography":"5",
        "history":"2"
    },
    "wales":{  
        "illustration":"4",
        "business":"6",
        "fashion":"3"
    }

}

Answer 1

您可以使用 reduce() 返回对象，并使用 Array.from 将 jQuery 对象转换为对象数组，以便您可以使用 reduce 方法就可以了。

// Select direct div children of body, make an array from them and use reduce on it
const data = Array.from($('body > div')).reduce(function(r, e) {
  // Add property for each div / object in array where key is id and value will be another object from array of children of current div 
  r.groups[e.id] = Array.from($(e).children())
    .reduce(function(acc, el, i, arr) {
      // Here we are looping each element in div and if (i % 2 == 0) that means its property so we will use it for key and the next one will be used for value
      if (i % 2 == 0) acc[el.textContent] = arr[i + 1].textContent
      // return accumulator
      return acc
    }, {})
  // return accumulator
  return r;
  // Accumulator of first reduce is object with groups property
}, {groups: {}})

console.log(data)

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div id="england">
  <div class="property">health</div>
  <div class="count">3</div>
  <div class="property">education</div>
  <div class="count">1</div>
  <div class="property">entertainment</div>
  <div class="count">12</div>
</div>
<div id="scotland">
  <div class="property">geography</div>
  <div class="count">5</div>
  <div class="property">history</div>
  <div class="count">2</div>
</div>
<div id="wales">
  <div class="property">illustration</div>
  <div class="count">4</div>
  <div class="property">business</div>
  <div class="count">6</div>
  <div class="property">fashion</div>
  <div class="count">3</div>
</div>