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Remove Duplicate Array 1

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MarkZK

MarkZK

Technical User
Jul 13, 2006
202
GB
Hi all,

Could someone please tell me the best way to remove a duplicate string from an array, for example, if I have this script...

Code: 
<html>
<body>
<script type="text/javascript">
var str="zz1,tr4,de6,q2q,tr4,qq0"
a=str.split(",")
for (i = 0; i <a.length; i++){
document.write(a[i]+"<br \/>")
}
</script>
</body>
</html>

the output is
Code: 
zz1
tr4
de6
q2q
tr4
qq0

although, I'd like it to be ...

Code: 
zz1
tr4
de6
q2q
qq0
removing "tr4" as it appears twice,

Thanks
 
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I'd use a simple associative array (hashmap)... something like this:

Code: 
<script type="text/javascript">
	var dupsArray = [];
	var str = 'zz1,tr4,de6,q2q,tr4,qq0';
	a = str.split(',');
	for (var loop=0; loop<a.length; loop++) {
		var theValue = a[loop]
		if (typeof(dupsArray[theValue] == 'undefined') {
			document.write(theValue + '<br \/>');	
		}
		dupsArray[theValue] = true;
	}
</script>

Hope this helps,
Dan

Coedit Limited - Delivering standards compliant, accessible web solutions

[tt]Dan's Page [blue]@[/blue] Code Couch
[/tt]
 
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This looks great, I prefer this to the results at google,

Thanks Billy Ray Preachers Son. :)
 
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