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What does the thread_local mean in C++11?
I am confused with the description of thread_local in C++11. My understanding is, each thread has unique copy of local variables in a function. The global/static variables can be accessed by all the threads (possibly synchronized access using locks). And the thread_local variables are visible to...
Strange, unexpected behavior (disappearing/changing values) when using Hash default value, e.g. Hash
... note that this behavior applies to any default value that is subsequently mutated (e.g. hashes and strings), not just arrays.
TL;DR: Use Hash.new { |h, k| h[k] = [] } if you want the most idiomatic solution and don’t care why.
What doesn’t work
Why Hash.new([]) doesn’t work
Let’s look...
How to call C from Swift?
Is there a way to call C routines from Swift?
6 Answers
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Why and How to avoid Event Handler memory leaks?
I just came to realize, by reading some questions and answers on StackOverflow, that adding event handlers using += in C# (or i guess, other .net languages) can cause common memory leaks...
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Get element inside element by class and ID - JavaScript
Alright, I've dabbled in JavaScript before, but the most useful thing I've written is a CSS style-switcher. So I'm somewhat new to this. Let's say I have HTML code like this:
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Better explanation of when to use Imports/Depends
The " Writing R Extensions " manual provides the following guidance on when to use Imports or Depends:
4 Answers
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Javascript seconds to minutes and seconds
This is a common problem but I'm not sure how to solve it. The code below works fine.
27 Answers
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What column type/length should I use for storing a Bcrypt hashed password in a Database?
... would be the correct length? Are passwords hashed with BCrypt always of same length?
4 Answers
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How to split last commit into two in Git
I have two working branches, master and forum and I've just made some modifications in forum branch, that I'd like to cherry-pick into master . But unfortunately, the commit I want to cherry-pick also contains some modifications that I don't want.
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Named colors in matplotlib
What named colors are available in matplotlib for use in plots? I can find a list on the matplotlib documentation that claims that these are the only names:
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