RegEx - JavaScript .match（），带有一个变量关键字 [英] RegEx - JavaScript .match() with a variable keyword

问题描述

我有一个包含关键字的字符串，用逗号分隔。

现在我还有一个很好的 RegEx

查看这个初始问题 - RegEx - 从逗号分隔字符串中提取包含子字符串的单词

以下示例工作正常;它有一个masterString和一个resultString。最后一个仅包含至少包含汽车字样的关键字。

  masterString =typography，caret，car，align，shopping-cart，adjust，card; 
 resultString = masterString.match（/ [^，] * car [^，] * / g）; 
 console.log（resultString）; 
  

上述代码的结果;

 caret，car，shopping-cart，card
  

但是如何使用RegEx和一个可变的匹配字（在这个例子中， car 是静态的而不是可变的）。

我认为它必须用RegExp做一些事情 - 但我不能弄清楚...

---

更新1

我想出了这个快速，也许很脏的解决方案...

  var query ='car'; 
 var string =car，bike，carrot，plane，card; 
 var regex = new RegExp（[^，] * | QUERY | [^，] *。replace（'| QUERY |'，query），'ig'）; 
 string.match（regex）; 
  

此代码输出以下内容，不知道它是否精心制作，'虽然..

 car，carrot，card
   
 
 
 
 
  UPDATE 2  
 
 
 
 ，更简单的解决方案; 
  var query =car; 
 var string =car，bike，carrot，plane，card; 
 string.match（new RegExp（[^，] *+ query +[^，] *，'ig'））; 
  
此代码输出以下字符串：
  [car，carrot，card] 
  
 
 
 < hr> 
 
 
我的应用搜索引擎现在可以正常工作:)  - 请参阅  http://i.imgur.com/RXwkrrF.png?1   
解决方案
这个怎么样，你只需要替换\ \与String，它适用于我。它可以找到你的字符串是否有car，而不是其他类似的词
  var query ='car'; 
 var string =car，bike，carrot，plane，card; 
 var strRegEx ='[^，] *'+ query +'[，$] *'; 
 string.match（strRegEx）; 
  
 
I have a string with keywords, separated by comma's.

Now I also have a nice RegEx, to filter out all the keywords in that string, that matches a queried-string.

Check out this initial question - RegEx - Extract words that contains a substring, from a comma seperated string

The example below works fine; it has a masterString, and a resultString. That last one only contains the keywords that has at least the word "car" in it.
masterString = "typography,caret,car,align,shopping-cart,adjust,card";
resultString = masterString.match(/[^,]*car[^,]*/g);
console.log(resultString);
Result from the code above;
"caret", "car", "shopping-cart", "card"
But how can I use the RegEx, with a variable matching-word (the word "car" in this example static and not variable).

I think it has to do something with a RegExp - but I can't figure out...



UPDATE 1

I figured out this quick-and-maybe-very-dirty solution...
var query  = 'car';
var string = "car,bike,carrot,plane,card";
var regex  = new RegExp("[^,]*|QUERY|[^,]*".replace('|QUERY|',query),'ig');
string.match(regex);
This code outputs the following, not sure if it is good crafted, 'though..
"car", "carrot", "card"




UPDATE 2

I figured out another, much simpler solution;
var query  = "car";
var string = "car,bike,carrot,plane,card";
string.match(new RegExp("[^,]*"+query+"[^,]*",'ig'));
This code outputs the string below;
["car", "carrot", "card"]




My app-search-engine now works perfect :) - see http://i.imgur.com/RXwkrrF.png?1
解决方案
How about this one?, you only need to replace \ \ with String , and it works for me. it can find whether your string has "car", not other similar word
 var query  = 'car';
 var string = "car,bike,carrot,plane,card";
 var strRegEx = '[^,]*'+query+'[,$]*'; 
 string.match(strRegEx);


                        
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