blocks|key|4024637|text|可以使用Regex+Look+Aheads检查前面是否有=符号的变量名|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4024638|​|4024639|var+str+=+"foo=valor+bar=second";
var+varRegex+=+/\w%2B(?=(\s)*(\=))/g;
var+valueRegex+=+/(?<=(\=)[\s'"]*)\w%2B/g;

var+varArr+=+str.match(varRegex);
var+valueArr+=+str.match(valueRegex);
console.log(valueArr);

let+obj+=+{};
for(let+i+in+varArr)+{
++obj[varArr[i]]+=+valueArr[i];
}

console.log(obj);|code-block|syntax|javascript|4024640|4024641|entityMap|0|LINK|mutability|MUTABLE|url|https://www.regular-expressions.info/lookaround.html^0|S|1|4|H|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|V|8|@$9|W|A|X|B|C]]|D|@$9|Y|A|Z|1|10]]|E|$]]|$1|F|3|G|5|6|7|11|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|12|8|@]|D|@]|E|$K|L]]|$1|M|3|G|5|6|7|13|8|@]|D|@]|E|$]]|$1|N|3|-4|5|6|7|14|8|@]|D|@]|E|$]]]|O|$P|$5|Q|R|S|E|$T|U]]]]

<p>You can use <a href="https://www.regular-expressions.info/lookaround.html" rel="nofollow noreferrer">Regex Look Aheads</a> to check for a variable name that is preceded by an <code>=</code> symbol</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 str = "foo=valor bar=second";
var varRegex = /\w+(?=(\s)*(\=))/g;
var valueRegex = /(?&lt;=(\=)[\s'"]*)\w+/g;

var varArr = str.match(varRegex);
var valueArr = str.match(valueRegex);
console.log(valueArr);

let obj = {};
for(let i in varArr) {
  obj[varArr[i]] = valueArr[i];
}

console.log(obj);</code></pre>
</div>
</div>
</p>


blocks|key|4023098|text|var+str+=+"foo=valor,bar=second";

var+obj+=+{};

str.split(",").forEach(
+++++function(item){
+++++if(item){+
++++++++var+vars+=+item.split("=");+
++++++++obj[vars[0]]+=+vars[1]+
++++++}
+});
+console.log(obj)|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|4023099|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>var str = "foo=valor,bar=second";

var obj = {};

str.split(",").forEach(
     function(item){
     if(item){ 
        var vars = item.split("="); 
        obj[vars[0]] = vars[1] 
      }
 });
 console.log(obj)
</code></pre>


blocks|key|4024746|text|与前一个答案不同的方法:您可以在空格上拆分字符串，然后映射结果数组，在等号上拆分以创建您的对象(左侧是属性，右侧是值)|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4024747|如果您需要它，您可以减少它，将数组转换为一个包含所有值的大对象|4024748|​|4024749|let+a+=+"foo=valor+bar=second"

console.log(a.split('+').map((i,v)+=>+{+return+JSON.parse(`{"${i.split('=')[0]}":+"${i.split('=')[1]}"}`);}))


let+b+=+a.split('+').map((i,v)+=>+{+return+JSON.parse(`{"${i.split('=')[0]}":+"${i.split('=')[1]}"}`);})


console.log(b.reduce(function(acc,+x)+{
++++for+(var+key+in+x)+acc[key]+=+x[key];
++++return+acc;
+++}));|code-block|syntax|javascript|4024750|4024751|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|O|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|P|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|Q|8|@]|9|@]|A|$I|J]]|$1|K|3|E|5|6|7|R|8|@]|9|@]|A|$]]|$1|L|3|-4|5|6|7|S|8|@]|9|@]|A|$]]]|M|$]]

<p>Different approach from the previous answer: You can split the string on spaces and then map the result array, splitting on the equal sign to create your object (left side is property, right side is value) </p>

<p>If you need it your specific format you can reduce it to convert the array into one big object with all the values </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 a = "foo=valor bar=second"

console.log(a.split(' ').map((i,v) =&gt; { return JSON.parse(`{"${i.split('=')[0]}": "${i.split('=')[1]}"}`);}))


let b = a.split(' ').map((i,v) =&gt; { return JSON.parse(`{"${i.split('=')[0]}": "${i.split('=')[1]}"}`);})


console.log(b.reduce(function(acc, x) {
    for (var key in x) acc[key] = x[key];
    return acc;
   }));</code></pre>
</div>
</div>
</p>


blocks|key|4023208|text|不一定是最快的答案(就提交速度而言)，但需要维护的正则表达式更少，存储的变量也更少。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4023209|function+toJSON(str)+{
++const+regex+=+/(\w%2B)\=(\w%2B)\s*/g;
++let+result+=+{};
++let+match;

++while+(match+=+regex.exec(str))+{
++++result[match[1]]+=+match[2];
++}

++return+result;
}

console.log(toJSON("foo=valor+bar=second"));|code-block|syntax|javascript|4023210|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

<p>Not necessarily the quickest answer (in terms of speed of submission), but less regular expressions to maintain and less variables to store.</p>

<pre><code>function toJSON(str) {
  const regex = /(\w+)\=(\w+)\s*/g;
  let result = {};
  let match;

  while (match = regex.exec(str)) {
    result[match[1]] = match[2];
  }

  return result;
}

console.log(toJSON("foo=valor bar=second"));
</code></pre>


<p>I want to extract the variables names from a string like this: <code>"foo=valor bar=second"</code>, and so on. </p>

<p>To return:</p>

<pre><code>{ 
   foo: "valor", 
   bar: "second",
   ...
}
</code></pre>


what is the best way to extract variables with '=' from a string in javascript

JSON

我想从一个字符串中提取变量名，如下所示："foo=valor bar=second"等等。返回：{    foo: "valor",    bar: "second",   ...}

问在javascript中从字符串中提取带有'=‘的变量的最佳方法是什么
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