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What does the “__block” keyword mean?

What exactly does the __block keyword in Objective-C mean? I know it allows you to modify variables within blocks, but I'd like to know... ...
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mingw-w64 threads: posix vs win32

I'm installing mingw-w64 on Windows and there are two options: win32 threads and posix threads. I know what is the difference between win32 threads and pthreads but I don't understand what is the difference between these two options. I doubt that if I will choose posix threads it will prevent me fro...
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What is the most efficient way to loop through dataframes with pandas? [duplicate]

...Note that iterrows is very slow (it converts every row to a series, potentially messing with your data types). When you need an iterator, better to use itertuples – joris Jul 29 '15 at 15:46 ...
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Can an AJAX response set a cookie?

...ink the question only makes sense for http clients that support cookie. So all question-asker only wishes to know if cookies can be written in AJAX request that means his UA supports cookies :) – this. __curious_geek Jul 27 '10 at 4:52 ...
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How to structure a express.js application?

... it. Of those, I think Twitter's matador is structured pretty well. We actually used a very similar approach to how they load up parts of the app. derby.js also looks extremely interesting. It's akin to meteor without all of the hype and actually gives credit where credit is due (notably, node and e...
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Run a Docker image as a container

...s something to run. You could replace that with a program that you've installed. /bin/bash is just a handy shell that's already installed. – Ryan Shillington Feb 9 '17 at 15:11 ...
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How to normalize an array in NumPy?

I would like to have the norm of one NumPy array. More specifically, I am looking for an equivalent version of this function ...
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Get img thumbnails from Vimeo?

...videos> <video> [skipped] <thumbnail_small>http://ts.vimeo.com.s3.amazonaws.com/235/662/23566238_100.jpg</thumbnail_small> <thumbnail_medium>http://ts.vimeo.com.s3.amazonaws.com/235/662/23566238_200.jpg</thumbnail_medium> &lt...
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Tools to selectively Copy HTML+CSS+JS From A Specific Element of DOM [closed]

Like most web developers, I occasionally like to look at the source of websites to see how their markup is built. Tools like Firebug and Chrome Developer Tools make it easy to inspect the code, but if I want to copy a specific section and play around with it locally, it would be a pain to copy all t...
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Why is “import *” bad?

...ed (readability). Because you can't use cool tools like pyflakes to statically detect errors in your code. share | improve this answer | follow | ...