The regex (a)\10()()()()()()()()(b) has diff meaning in Java, JS, .NET, Perl/PCRE, & XRegExp. 5 distinct meanings! XRegExp makes it an error
@slevithan I smell a blog post with an explanation in the making :) #prettyplease
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@mathias If I blogged every cross-flavor or cross-browser regex difference, I'd have no time for anything else. :P Twitter version coming...Thanks. Twitter will use this to make your timeline better. UndoUndo
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@mathias ..Even more meanings when you add POSIX BRE (uses \(a\) for grouping) and POSIX ERE (does not support backrefs) to the mix.Thanks. Twitter will use this to make your timeline better. UndoUndo
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