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What does the caret operator (^) in Python do?

...his way: 1000 # 8 (binary) 0011 # 3 (binary) ---- # APPLY XOR ('vertically') 1011 # result = 11 (binary) share | improve this answer | follow | ...
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M_PI works with math.h but not with cmath in Visual Studio

...) and suddenly it compile perfectly. Try moving it higher up the page. Totally unsure as to why this would cause issues though. Edit: Figured it out. The #include <math.h> occurs within cmath's header guards. This means that something higher up the list of #includes is including cmath with...
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What is the “main file” property when doing bower init?

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Express-js can't GET my static files, why?

... In case of new install you should verify that your express module is properly installed (expressjs.com/en/starter/installing.html) then you should check the path and your directory name like Giacomo said ;) – Spl2nky ...
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Unzip a file with php

...e it out by yourself. On the other hand, the fact that this code could actually be published online somewhere as the correct way to unzip a file is a bit frightening. PHP has built-in extensions for dealing with compressed files. There should be no need to use system calls for this. ZipArchivedocs ...
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Setting the selected value on a Django forms.ChoiceField

...rying to assign the selected value to a ChoiceField. If you have already called super().__init__ in your Form class, you should update the form.initial dictionary, not the field.initial property. If you study form.initial (e.g. print self.initial after the call to super().__init__), it will contai...
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How to obtain the number of CPUs/cores in Linux from the command line?

... Note that both of these will end up counting twice as many cores as actually exist if you're on a system with hyperthreading (e.g, P4, or Core i7). – duskwuff -inactive- Jun 26 '11 at 0:04 ...
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Is there a way to make mv create the directory to be moved to if it doesn't exist?

...ectories don't exist, is there some way to have those directories automatically created, so that you would only have to type ...
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How to add facebook share button on my website?

... You don't need all that code. All you need are the following lines: <a href="https://www.facebook.com/sharer/sharer.php?u=example.org" target="_blank"> Share on Facebook </a> Documentation can be found at https://developers...
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How to make URL/Phone-clickable UILabel?

...TextView.editable = NO; yourTextView.dataDetectorTypes = UIDataDetectorTypeAll; Swift: yourTextView.editable = false; yourTextView.dataDetectorTypes = UIDataDetectorTypes.All; This will detect links automatically. See the documentation for details. ...