Wednesday, July 4, 2012

java vs javascript regex

Hi all, I've read that there are differences between the Java and
Javascript regex patterns, so you'll get different behaviour when it
dev/hosted/prod mode using regex.

I'm trying to do a split which includes the delimiter to process camel
case text. In simpler form (forgetting acronyms and such):
String regex = "(?=[A-Z])";
String[] words = camelCase.split(regex);
// go on to capitalise each word

This works in dev mode - straightforward java regex. But this doesn't
work as expected in prod mode. Then through a little trial and error
here: http://www.pagecolumn.com/tool/regtest.htm (click the "Return"
tab to see the evaluated output)

This piece of javascript did what I wanted.
var myArray = str.split(/(?=[A-Z])/g)

So off I went and plucked "/(?=[A-Z]/g" into my
camelCase.split(regex), but it appears to be just returning the entire
string.

Test browser is FF12.

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