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Known issues

RegExhibit was written to explore regular expressions. It is not optimized to deal with large amounts of text. That doesn’t mean, it cannot handle them, but you won’t get great performance.

When you resize RegExhibit’s main window the down arrow in the scrollbar of the area that shows the results for a replacement or a split, can become unresponsive. This seems to be a Cocoa issue.

If you use certain Unicode characters, e.g. Chinese, in your sample text without checking the “Unicode” modifier, RegExhibit will report an invalid regular expression even when this is not the case. With “Unicode” checked, everything should work as expected.

You cannot use a null character, (\0 or any of its variants), inside the replacement string when replacing. RegExhibit uses null characters internally, and it will think your regular expression is invalid. Sorry. On the bright side: even if you could use them, you wouldn’t see them as replacement text, because they are non-printing characters. ;-)