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How does !!~ (not not tilde/bang bang tilde) alter the result of a 'contains/included' Array method

If you read the comments at the jQuery inArray page here , there's an interesting declaration: 13 Answers ...
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Convert base class to derived class [duplicate]

...it possible in C# to explicitly convert a base class object to one of it's derived classes? Currently thinking I have to create a constructor for my derived classes that accept a base class object as a parameter and copy over the property values. I don't really like this idea, so I'd like to avoid i...
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How to print an exception in Python?

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Why does DEBUG=False setting make my django Static Files Access fail?

Am building an app using Django as my workhorse. All has been well so far - specified db settings, configured static directories, urls, views etc. But trouble started sneaking in the moment I wanted to render my own beautiful and custom 404.html and 500.html pages. ...
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Detect changed input text box

I've looked at numerous other questions and found very simple answers, including the code below. I simply want to detect when someone changes the content of a text box but for some reason it's not working... I get no console errors. When I set a breakpoint in the browser at the change() functio...
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configure: error: C compiler cannot create executables

I've checked a number of similar questions on stackoverflow but haven't found an answer yet. 15 Answers ...
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Is there a good Valgrind substitute for Windows?

I was looking into Valgrind to help improve my C coding/debugging when I discovered it is only for Linux - I have no other need or interest in moving my OS to Linux so I was wondering if there is a equally good program for Windows. ...
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What Computer Science concepts should I know? [closed]

What concepts in Computer Science do you think have made you a better programmer? 33 Answers ...
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Script entire database SQL-Server

Is there a way I can get a scripting of all tables, procs, and other objects from a database? I know there's an option to script the database but it only gave me some sort of top level script, certainly not a script to create all tables, procs, udfs, .etc. ...
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How to test a merge without actually merging first

...imulating a git merge between two branches, the current working branch and the master, but without making any changes? 8 ...