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How can we match a^n b^n with Java regex?

...-referencing group is to make the self-reference matching optional. Step 4½: Understanding what went wrong The problem is that since we made the self-reference matching optional, the "counter" can "reset" back to 0 when there aren't enough b's. Let's closely examine what happens at every iteration...
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How can I pipe stderr, and not stdout?

... @JonasDahlbæk: the tweak is primarily an issue of tidiness. In truly arcane situations, it might make the difference between a process detecting and not detecting EOF, but that requires very peculiar circumstances. ...
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How can I copy the content of a branch to a new local branch?

I have worked on a local branch and also pushed the changes to remote. I want to revert the changes on that branch and do something else on it, but I don't want to lose the work completely. I was thinking of something like create a new branch locally and copy the old branch there, then I can revert ...
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Most useful NLog configurations [closed]

What are the best or most useful configurations for logging with NLog? (These can be simple or complex, as long as they're useful.) ...
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How do we determine the number of days for a given month in python [duplicate]

... edited Dec 2 '19 at 14:24 Gonçalo Peres 龚燿禄 2,89133 gold badges1111 silver badges2727 bronze badges answered Feb 8 '11 at 21:06 ...
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Is there a difference between “==” and “is”?

...ption, but that said == None works too... – Jean-François Fabre♦ Jul 24 '19 at 6:20 @Jean-FrançoisFabre Another ex...
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Why does modern Perl avoid UTF-8 by default?

...=>"is",level => 1)->eq("d", " ð") is false. Similarly, "ae" and "æ" are eq if you don’t use locales, or if you use the English one, but they are different in the Icelandic locale. Now what? It’s tough, I tell you. You can play with ucsort to test some of these things out. Consider ...
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Search of table names

... Includes views too :-) – François Breton Nov 2 '17 at 15:46 add a comment  |  ...
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Create empty file using python [duplicate]

...t's also unix-only. Won't work on windows – Jean-François Fabre♦ Aug 13 '18 at 22:01 It is the only way if you abso...
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Print list without brackets in a single row

...ted Oct 5 '18 at 14:51 Jean-François Fabre♦ 122k1111 gold badges9797 silver badges156156 bronze badges answered Jun 24 '12 at 14:01 ...