Question

我有两个javascript对象数组：

var fullDateRange=[{date:"4/1/18",value:0},{date:"4/2/18",value:0},{date:"4/3/18",value:0},{date:"4/4/18",value:0},{date:"4/5/18",value:0}]

和

var actualDateRange=[{date:"4/1/18",value:1},{date:"4/3/18",value:3},{date:"4/5/18",value:5}]

我正在尝试循环遍历fullDateRange数组，查看是否存在任何actualDateRange日期，并递增该值。但我一直在使用这段代码重复：

   function outputDeltaDates(fullDateObj, responseObj) {
    var dateArr = [],
      valueArr = [];
    $.each(fullDateObj, function(index) {
      var fullDate = this;
      var counter = 0
      $.each(responseObj, function(index) {
        var fullResponse = this;
        if (fullResponse['date'] == fullDate['date']) {
          valueArr.push(fullResponse['value'])
          dateArr.push(fullDate['date'])
        } else {
          if (!dateArr.includes(fullDate['date'])) {
            valueArr.push(0)
            dateArr.push(fullDate['date'])
          }
        }
      })
    })
    return [valueArr, dateArr]
  }

Answer 1

如果日期存在于另一个数组中，则递增对象值属性，只需将其循环一次，如果在actualDateRange中找到日期，则递增值

＆＃13;

var fullDateRange=[{date:"4/1/18",value:0},{date:"4/2/18",value:0},{date:"4/3/18",value:0},{date:"4/4/18",value:0},{date:"4/5/18",value:0}]
var actualDateRange=[{date:"4/1/18",value:1},{date:"4/3/18",value:3},{date:"4/5/18",value:5}]

fullDateRange.forEach(e => {
    let act = actualDateRange.find(a => a.date === e.date);
    if (act) e.value += act.value;
})

console.log(fullDateRange);

＆＃13;

Answer 2

要达到预期的结果，请将增量计数器推送到 valueArr ，即

valueArr.push(++counter)

而不是 fullResponse ['value'] （将推送actualDateRange值）

var fullDateRange=[{date:"4/1/18",value:0},{date:"4/2/18",value:0},{date:"4/3/18",value:0},{date:"4/4/18",value:0},{date:"4/5/18",value:0}]
var actualDateRange=[{date:"4/1/18",value:1},{date:"4/3/18",value:3},{date:"4/5/18",value:5}]

function outputDeltaDates(fullDateObj, responseObj) {
    var dateArr = [],
      valueArr = [];
    $.each(fullDateObj, function(index) {
      var fullDate = this;
      var counter = 0
      $.each(responseObj, function(index) {
        var fullResponse = this;
        if (fullResponse['date'] == fullDate['date']) {
          valueArr.push(++counter)
          dateArr.push(fullDate['date'])
        } else {
          if (!dateArr.includes(fullDate['date'])) {
            valueArr.push(0)
            dateArr.push(fullDate['date'])
          }
        }
      })
    })
     return [valueArr, dateArr]
  } 

console.log(outputDeltaDates(fullDateRange, actualDateRange))

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

代码示例 - https://codepen.io/nagasai/pen/rvVqdW?editors=1010

在两个单独的JavaScript对象之间查找重复值？

2 个答案: