blocks|key|4162039|text|您可以只遍历一个对象的Object.keys()，然后使用reduce()减去另一个对象。这假设两个对象具有相同的关键字。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4162040|​|4162041|let+previousChart+=++{BWP:+1,+ZAR:+1.3,+USD:+0.09324,+number:+1};
let+currentChart+=+{BWP:+1,+ZAR:+1.35,+USD:+0.01,+number:+2};

let+newObj+=+Object.keys(previousChart).reduce((a,+k)+=>+{
++++a[k]+=+previousChart[k]+-+currentChart[k];
++++return+a;
},+{});

console.log(newObj);|code-block|syntax|javascript|4162042|4162043|当然，您可以添加一些代码来将浮点处理到所需的精度。|4162044|您可以将其转换为一个函数，这将允许您轻松地处理一组值并将它们全部相减：|4162045|4162046|let+rates+=+[
++++{BWP:+1,+ZAR:+1.3,+USD:+0.09324,+number:+1},
++++{BWP:+1,+ZAR:+1.35,+USD:+0.01,+number:+2},
++++{BWP:+1,+ZAR:+1.3456,+USD:+0.09234,+number:+3},
++++{BWP:+1,+ZAR:+1.27894,+USD:+0.06788,+number:+4}
];

function+subtract(r1,+r2)+{
++return+Object.keys(r1).reduce((a,+k)+=>+{
++++++a[k]+=+r1[k]+-+r2[k];
++++++return+a;
++},+{});
}

let+total+=+rates.reduce((a,+c)+=>+subtract(a,+c));

//+subtract+all+values+of+rates+array
console.log(total);|4162047|4162048|entityMap^0|B|D|T|8|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|X|8|@$9|Y|A|Z|B|C]|$9|10|A|11|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|12|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|13|8|@]|D|@]|E|$K|L]]|$1|M|3|G|5|6|7|14|8|@]|D|@]|E|$]]|$1|N|3|O|5|6|7|15|8|@]|D|@]|E|$]]|$1|P|3|Q|5|6|7|16|8|@]|D|@]|E|$]]|$1|R|3|G|5|6|7|17|8|@]|D|@]|E|$]]|$1|S|3|T|5|J|7|18|8|@]|D|@]|E|$K|L]]|$1|U|3|G|5|6|7|19|8|@]|D|@]|E|$]]|$1|V|3|-4|5|6|7|1A|8|@]|D|@]|E|$]]]|W|$]]

<p>You can just loop through the <code>Object.keys()</code> of one object and subtract the other using <code>reduce()</code>. This assumes both objects have the same keys. </p>

<p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
<div class="snippet-code">
<pre class="snippet-code-js lang-js prettyprint-override"><code>let previousChart =  {BWP: 1, ZAR: 1.3, USD: 0.09324, number: 1};
let currentChart = {BWP: 1, ZAR: 1.35, USD: 0.01, number: 2};

let newObj = Object.keys(previousChart).reduce((a, k) =&gt; {
    a[k] = previousChart[k] - currentChart[k];
    return a;
}, {});

console.log(newObj);</code></pre>
</div>
</div>
</p>

<p>Of course you can add some code to handle the floating points to the precision you want.</p>

<p>You can make this into a function, which will allow you to easily work with an array of values and subtract them all:</p>

<p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
<div class="snippet-code">
<pre class="snippet-code-js lang-js prettyprint-override"><code>let rates = [
    {BWP: 1, ZAR: 1.3, USD: 0.09324, number: 1},
    {BWP: 1, ZAR: 1.35, USD: 0.01, number: 2},
    {BWP: 1, ZAR: 1.3456, USD: 0.09234, number: 3},
    {BWP: 1, ZAR: 1.27894, USD: 0.06788, number: 4}
];

function subtract(r1, r2) {
  return Object.keys(r1).reduce((a, k) =&gt; {
      a[k] = r1[k] - r2[k];
      return a;
  }, {});
}

let total = rates.reduce((a, c) =&gt; subtract(a, c));

// subtract all values of rates array
console.log(total);</code></pre>
</div>
</div>
</p>


blocks|key|4162091|text|如果我没理解错的话，你要找的数组是前面几个数组中每个值的差。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4162092|让我们假设这是您的输入|4162093|rates+=+[
++{BWP:+1,+ZAR:+1.3,+USD:+0.09324,+number:+1},
++{BWP:+1,+ZAR:+1.35,+USD:+0.01,+number:+2},
++{BWP:+1,+ZAR:+1.3456,+USD:+0.09234,+number:+3},
++{BWP:+1,+ZAR:+1.27894,+USD:+0.06788,+number:+4}
]|code-block|syntax|javascript|4162094|你想要一个像这样的数组|4162095|{BWP:+1,+ZAR:+1.3,+USD:+0.09324,+number:+1}|4162096|就是结果。这样就可以完成任务了|4162097|​|4162098|var+rates+=+[
++{BWP:+1,+ZAR:+1.3,+USD:+0.09324,+number:+1},
++{BWP:+1,+ZAR:+1.35,+USD:+0.01,+number:+2},
++{BWP:+1,+ZAR:+1.3456,+USD:+0.09234,+number:+3},
++{BWP:+1,+ZAR:+1.27894,+USD:+0.06788,+number:+4}
]

//+I+use+the+last+object+as+the+"template"
var+result+=+rates[rates.length+-+1];+
var+keys+=+Object.keys(result);

for+(var+i+=+rates.length+-+1;+i+>+0;+i+--)+{
++keys.forEach(function+(elem)+{
++++result[elem]+-=+rates[i-1][elem];
++});
}

console.log(result);|4162099|4162100|entityMap^0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|V|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|W|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|X|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|Y|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|Z|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|10|8|@]|9|@]|A|$]]|$1|O|3|P|5|6|7|11|8|@]|9|@]|A|$]]|$1|Q|3|R|5|F|7|12|8|@]|9|@]|A|$G|H]]|$1|S|3|P|5|6|7|13|8|@]|9|@]|A|$]]|$1|T|3|-4|5|6|7|14|8|@]|9|@]|A|$]]]|U|$]]

<p>If I'm understanding this correctly you are looking for an array that is the difference of each value in the previous ones.</p>

<p>Let's assume this is your input</p>

<pre><code>rates = [
  {BWP: 1, ZAR: 1.3, USD: 0.09324, number: 1},
  {BWP: 1, ZAR: 1.35, USD: 0.01, number: 2},
  {BWP: 1, ZAR: 1.3456, USD: 0.09234, number: 3},
  {BWP: 1, ZAR: 1.27894, USD: 0.06788, number: 4}
]
</code></pre>

<p>And you want an array like</p>

<pre><code>{BWP: 1, ZAR: 1.3, USD: 0.09324, number: 1}
</code></pre>

<p>to be the result.
Then this will do the job</p>

<p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
<div class="snippet-code">
<pre class="snippet-code-js lang-js prettyprint-override"><code>var rates = [
  {BWP: 1, ZAR: 1.3, USD: 0.09324, number: 1},
  {BWP: 1, ZAR: 1.35, USD: 0.01, number: 2},
  {BWP: 1, ZAR: 1.3456, USD: 0.09234, number: 3},
  {BWP: 1, ZAR: 1.27894, USD: 0.06788, number: 4}
]

// I use the last object as the "template"
var result = rates[rates.length - 1]; 
var keys = Object.keys(result);

for (var i = rates.length - 1; i &gt; 0; i --) {
  keys.forEach(function (elem) {
    result[elem] -= rates[i-1][elem];
  });
}

console.log(result);</code></pre>
</div>
</div>
</p>


<p>I am trying to get the difference between two objects</p>

<pre><code>previousChart: {BWP: 1, ZAR: 1.3, USD: 0.09324, number: 1},
currentChart: {BWP: 1, ZAR: 1.35, USD: 0.01, number: 2}
</code></pre>

<p>The desired answer is:</p>

<pre><code>newObject ={BWP: 0, ZAR: 0.05, USD: 0.08324, number: -1}
</code></pre>

<p>Please don't ask me what I have done as this is the last stage because this is the last part of my code, if you are interested in knowing what I have done here it is: </p>

<pre><code>rates = [
{BWP: 1, ZAR: 1.3, USD: 0.09324, number: 1},
{BWP: 1, ZAR: 1.35, USD: 0.01, number: 2},
{BWP: 1, ZAR: 1.3456, USD: 0.09234, number: 3},
{BWP: 1, ZAR: 1.27894, USD: 0.06788, number: 4}
]

newRate = [];

for(let i in rates){

    if( i - 1 === -1 ){
        previousChart = rates[0];
    }else{
        previousChart = rates[i - 1];
    }
    let currentChart = rates[i];

}
</code></pre>


Get the difference two objects by subtracting properties

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

文章

问答

视频

学习中心

腾讯云实验室

直播

竞赛

腾讯云代码分析专区

腾讯iOA零信任安全管理系统专区

腾讯云架构师技术同盟交流圈

腾讯云数据库专区

腾讯云顾问专区

腾讯云原生专区

腾讯混元专区

腾讯云TCE专区

腾讯云Lighthouse专区

腾讯云HAI专区

腾讯云Edgeone专区

腾讯云存储专区

腾讯云智能专区

腾讯轻联专区 

腾讯云开发专区

TAPD专区

腾讯轻量云游戏服专区

腾讯云最具价值专家

腾讯云架构师技术同盟

腾讯云创作之星

腾讯云开发者先锋

腾讯云代码助手

云原生构建

TAPD 敏捷项目管理

Cloud Studio

SDK中心

API中心

命令行工具

涵盖代码开发、场景应用、自动测试全流程，助你从零构建专属AI助手

一站式MCP教程库，解锁AI应用新玩法

我在试着弄清楚两个物体之间的区别previousChart: {BWP: 1, ZAR: 1.3, USD: 0.09324, number: 1},currentChart: {BWP: 1, ZAR: 1.35, USD: 0.01, number: 2}想要的答案是：newObject ={BWP: 0, ZAR...

问通过减去属性得到两个对象的差异
EN

社区

活动

圈层

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问通过减去属性得到两个对象的差异EN

社区

活动

圈层

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问通过减去属性得到两个对象的差异
EN