Quick Question

[Danny]

is there a difference between using

if(td[x].className=='catbg'){

and

if(td[x].className.match(/catbg/i)){

I know the second one is like a regular expression but I just wanted to know if there was a difference.

[FireIndy]

No there is no difference. They are both comparring. Except the bottom u have as incasesensitive. But the top is looking for an exact match.

[Danny]

thanks man

[Ross]

Yes there is a difference

The first looks for an exact match, it is saying that the class must be exactly equal to "catbg"

The second one on the other hand just requires the class name to contain the string "catbg", it would still match against "catbg2" or "notthecatbg". Of course, you could use ^and $ to force the regular expression to match the start and end of the class name, but if you're only checking for an exact match, then use the first one. Only use the second one if you need to check for a particular RegEx pattern.

[Danny]

thanks alot again

I should know these things

[FireIndy]

Wouldnt the bottom one also get the className anyway?


Edit: Sorry if I was wrong.

[Ross]

fireindy said:

Wouldnt the bottom one also get the className anyway?


Edit: Sorry if I was wrong.

Yes it would match a classname of "catbg" and thus return true, but it would also return true for a classname of "catbg2" or "notthecatbg" whereas the first one wouldn't