split or regex difference between FF and IE

[jhcorey@yahoo.com]

I don't know where the actual issue is,
but hopefully someone can explain.

The following displays "5" in FireFox, but "3" in IE:

<script type="text/javascript" language="javas cript">
var newString = ",a,b,c,";
var treeArray = newString.split (/\,/i);
alert(treeArray .length);

</script>

Thanks,
Jim

[Grant Wagner]

Re: split or regex difference between FF and IE

<jhcorey@yahoo. com> wrote in message
news:1105639132 .095572.18020@f 14g2000cwb.goog legroups.com...[color=blue]
>I don't know where the actual issue is,
> but hopefully someone can explain.
>
> The following displays "5" in FireFox, but "3" in IE:
>
> <script type="text/javascript" language="javas cript">
> var newString = ",a,b,c,";
> var treeArray = newString.split (/\,/i);
> alert(treeArray .length);
>
> </script>
>
> Thanks,
> Jim[/color]

You've found one of the known issues with the String#split() method and
IE.

When you call split() using a String as the argument, IE includes empty
items in the resulting Array.

When you call split() using a RegExp as the argument, IE drops empty
items in the resulting Array.

var s = 'a#b##c###d';

// "4" - all Array elements contain non-empty strings
alert(s.split(/#/).length);

// "7" - Array elements 2, 4 and 5 are empty strings
alert(s.split(" #").length);

Note that in Gecko-based browsers and Opera, both alert "7". So the
simplest solution is probably to use String#split() with a String as the
parameter instead of a RegExp.

--
Grant Wagner <gwagner@agrico reunited.com>
comp.lang.javas cript FAQ - http://jibbering.com/faq