Example of using a regular expression in JavaScript to convert the case sensitivity. The regular expression is case sensitive.

Example of using a regular expression in JavaScript to convert the case sensitivity. The regular expression is case sensitive.

Use regular expressions in js to convert the case sensitivity. The code is very simple. See the Code:

Uppercase letters and lowercase letters

<script type="text/javascript"> function replaceReg(reg,str){ str = str.toLowerCase(); return str.replace(reg,function(m){return m.toUpperCase()}) } var reg = /\b(\w)|\s(\w)/g; var str = 'share javascript'; var str2 = 'SHARE JAVASCRIPT'; var str3 = 'Test \n str is no good!'; var str4 = 'final test'; document.write(replaceReg(reg,str)+'<br />'); document.write(replaceReg(reg,str2)+'<br />'); document.write(replaceReg(reg,str3)+'<br />'); document.write(replaceReg(reg,str4)+'<br />'); </script>

Only the first letter is in upper case. Other letters are not in upper case.

<script language="JavaScript"> <!-- var str="xi nAn shi you xUe yuan china people" alert(str.replace(/\s[a-z]/g,function($1){return $1.toLocaleUpperCase()}).replace(/^[a- z]/,function($1){return $1.toLocaleUpperCase()})) //--> </script>

Run the code and check the effect!

Case-insensitive conversion of a JAVA Regular Expression

. ReplaceAll ("[^ a-zA-Z] + ","");
You mean, remove all the non-letters in the string, and leave only the letters for conversion. That's okay. I just tried it.

The regular expression is case insensitive.

P = Pattern. compile ("^" + key + "= (. *) $", Pattern. CASE_INSENSITIVE );

Add Pattern. CASE_INSENSITIVE to ignore case sensitivity.
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