Parsing a number from a string?

[MrAdam]

Basically I have a string which I want to parse the numeric value from .. the string will be in this format: "Inbox [1]" (an example) .. Does anybody know a way I could return what ever's between the []s?Cheers guys!! Adam

[Ingolme]

I guess regular expressions would do the job, something like this:

var str = "inbox[1]"; var patt1 = /inbox\[(\d*)\]/;var result = str.match(patt1)[1];alert(result);

[jeffman]

Looks weird, but works:str="blah[12]blah";num = str.match(/\[([0-9]+)\]/)[1];num now equals 12.

[MrAdam]

Great stuff! Works great except, when there's no match it just doesn't seem to wanna play! checked firefox error console and it says:Error: str.match(patt1) is nullHow could I run a conditional to sort of be able to say wether or not there is anything there (for example the stirng may just be: "Inbox") ??Thanks for your help pal! Adam

[jeffman]

How are you using str.match(patt1) ? It usually goes in a conditional, like if (result = str.match(patt1)) {do something with result}.

[MrAdam]

var patt1 = /inbox\[(\d*)\]/;if (result = document.getElementById("newMessages").innerHTML.match(patt1)[1]) {	var currentCount = result;} else {	var currentCount = 0;}alert(currentCount);

But again, nothing happens and in the error console says patt1 is null ???I've also tried your idea Deidre's Dad, but again said = null ..Quite confused..Anybody any ideas?Cheers for the help!!Adam

[MrAdam]

Ahh realised the problem...

var str = 'inbox';var matchStr = '/\[([0-9]+)\]/';if (str.match(matchStr) == null) {	var currentCount = 0;} else {	var currentCount = str.match(matchStr)[1];}

Works perfect! Cheers guys!Adam