JS USES regular expressions to remove duplicate characters in a string

2020-10-07 18:35:08
OfStack

This article illustrated how JS USES regular expressions to remove duplicate characters in a string. To share for your reference, the details are as follows:

Here is a simple example of an JavaScript regular expression that filters out the redundant characters in a string that contains a duplicate string. Run it to see what happens.

The specific code is as follows:


<html>
<head>
<title> Use regular representation to remove duplicate characters in a string </title>
</head>
<body>
<script language="javascript">
 str = "Google" 
 str1 = str.replace(/(.).*\1/g,"$1") 
 document.write(str + "<br>");
 document.write(str1);
</script>
</body>
</html>

The operation results are as follows:

Google
Gogle

PS: Here are two more handy regular expression tools for you to use:

JavaScript Regular Expression online test tool:
http://tools.ofstack.com/regex/javascript

Regular expression online generation tool:
http://tools.ofstack.com/regex/create_reg

I hope this article has been helpful for JavaScript programming.