replace all

**prokhaled** · May 21st, 2002, 04:45 AM

How can I replace A With B in the string:

I used this JavaScript code:

var Y=X.replace('A','B');

but it is replace one letter only from the string ... I want to replace all A with B.

**sweevo** · May 21st, 2002, 04:51 AM

Code:

<html>
<head>
<title>Untitled</title>

<script>

function foo(inStr) {
inStr = inStr.replace(/a/gi, 'b');
alert(inStr);
}

</script>

</head>
<body>
<input type="button" value="Test" onClick="foo('abc abc abc');">
</body>
</html>

**progressive** · May 21st, 2002, 04:55 AM

As with the previous question about match() you need to use a regex with replace().

eg:

Code:

var my_string = "abbAa";
my_string.replace(/a/, 'b');

//mystring now equals "bbbAa"

however this will only replace on occurence of a lower case 'a'
so you need to use two regex commands
g - global replace, replaces all occurence of the regex in the string.
i - ignor case, replaces upper and lowercase

so the finished statement should be:

Code:

var my_string = "abbAa";
my_string.replace(/a/gi, 'b');

//mystring now equals "bbbbb"

I recommend you get yourself a good regex book as they are invaluable in many web scripting languages such as Perl, PHP, and javascript and the syntax is very similar for all.

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