replace function???

**Padrino** · Mar 21st, 2001, 01:16 PM

I want to know if there is a function in Javascript that can replace charater by another one.....ex:

var htmlcontent;
htmlcontent ="hello world";

htmlcontent= replace(htmlcontent,o,i);

alert(htmlcontent);

and I want the alert to show "helli wirld". Is there a function that can do that???

**harsoni** · Mar 21st, 2001, 02:55 PM

You can use match and replace functions in javascript..

Sonia

**Mark Sreeves** · Mar 22nd, 2001, 07:42 AM

The built in replace function but it onlt seems to replace the first 'o'

Code:

htmlcontent= htmlcontent.replace('o','i');

this works though:

Code:

<HTML>
<HEAD>
<script language="JavaScript"><!--

function replace(string,text,by) {
// Replaces text with by in string
    var strLength = string.length, txtLength = text.length;
    if ((strLength == 0) || (txtLength == 0)) return string;     
    var i = string.indexOf(text);
    if ((!i) && (text != string.substring(0,txtLength))) 
    return string;
    if (i == -1) return string;     
    var newstr = string.substring(0,i) + by;     
    if (i+txtLength < strLength)
        newstr += replace(string.substring(i+txtLength,strLength),text,by);     
        return newstr;
}


function doit()
{
var htmlcontent ="Hello World"
htmlcontent= replace(htmlcontent,'o','i'); 


alert(htmlcontent); 


}
//--></script>
</HEAD>
<BODY>

<form>

<input type=button onClick="doit()" value="click">
</form>
</BODY>
</HTML>

**Padrino** · Mar 22nd, 2001, 08:44 AM

thankz

it works!

**billrogers** · Mar 23rd, 2001, 09:36 AM

I replied to the post you put in the java forum, but in case you are wondering a better way then marks do this.

Yeah, if you use regular expressions this will be easy.

var myString = "Hello World";
var results = myString.replace(/o/gi,"i");
alert(results);

regexpr is /texttolookfor/g is for globlal, i is for ignore case

**Mark Sreeves** · Mar 26th, 2001, 02:22 AM

billrogers

That explains a lot!

I saw an example using the built in replace function but it didn't explain the switches.

Thanks

**billrogers** · Mar 26th, 2001, 09:26 AM

There is also alot of cool and short ways to do regular expressions, for instance they have escape code items built in, like \d will find Digits, you could put a * to find 0 or more occurrences, a plus for 1 or more etc.

I suggest the O'Rielly book on javascript. Not a bad reference book to have.

**tadeus** · Aug 11th, 2003, 06:59 PM

I got a textbox on my webform.
I need to get the word on the left of where the cursor is and replace it with another string, when the user presses Ctrl+Space.

So I think this would be:
a. get to know the user pressed Ctrl+Space.
b. Get the word on the left of the cursor.
c. Replace it with the right string.

Can anyone help me out with at least one of the items?

Thx

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