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Why are regular expressions so controversial? [closed]

...(?&atext)+ (?: \. (?&atext)+)*) (?<text> [\x01-\x09\x0b\x0c\x0e-\x7f]) (?<quoted_pair> \\ (?&text)) (?<qtext> (?&NO_WS_CTL) | [\x21\x23-\x5b\x5d-\x7e]) (?<qcontent> (?&qtext) | (?&quoted_pair)) ...
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No == operator found while comparing structs in C++

...nal/fraction object may have 6/8ths while another has 3/4ers, which for performance reasons they correct lazily with a separate normalisation step; you may have to decide whether to trigger a normalisation before comparison what to do when weak pointers aren't valid how to handle members and bases t...
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How does the Java 'for each' loop work?

...its` array. } So, overall summary: [nsayer] The following is the longer form of what is happening: for(Iterator<String> i = someList.iterator(); i.hasNext(); ) { String item = i.next(); System.out.println(item); } Note that if you need to use i.remove(); in your loop, or acces...
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Is there a naming convention for MySQL?

... often causes big debates in the DB community. I would stick with singular forms for both table names and columns. There. I've said it. The main thing here is of course consistency! share | improv...
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What is DOCTYPE?

...endering in older browsers) and other DOCTYPEs such as this one for HTML 4.01 transitional: <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> share | ...
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Is module __file__ attribute absolute or relative?

...s import path, getcwd, chdir def print_my_path(): print('cwd: {}'.format(getcwd())) print('__file__:{}'.format(__file__)) print('abspath: {}'.format(path.abspath(__file__))) print_my_path() chdir('..') print_my_path() Under Python-2.*, the second call incorrectly determines the...
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Why hasn't functional programming taken over yet?

... the sorts of problems we face. Our problems are all about taking in raw information -- strings and metadata -- and transforming them into different strings and metadata. In situations where mutations occur, like someone is typing in the IDE, the problem space inherently lends itself to functional t...
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Can I run javascript before the whole page is loaded?

...xchange.using('gps', function() { StackExchange.gps.track('embedded_signup_form.view', { location: 'question_page' }); }); $window.unbind('scroll', onScroll); } }; ...
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Can you explain the concept of streams?

... a stream which compresses whatever is put into it, writing the compressed form on to another stream, or one which encrypts the data, etc. At the other end there'd be the reverse chain, decrypting, decompressing or whatever. ...
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Simple explanation of clojure protocols

... can group multiple functions together and say "these 3 functions together form Protocol Foo". You cannot do that with Multimethods, they always stand on their own. For example, you could declare that a Stack Protocol consists of both a push and a pop function together. So, why not just add the cap...