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Why use Dijkstra's Algorithm if Breadth First Search (BFS) can do the same thing faster?
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How to use redis PUBLISH/SUBSCRIBE with nodejs to notify clients when data values change?
... fire.
Install node.js+npm(as non root)
First you should(if you have not done this yet) install node.js+npm in 30 seconds (the right way because you should NOT run npm as root):
echo 'export PATH=$HOME/local/bin:$PATH' >> ~/.bashrc
. ~/.bashrc
mkdir ~/local
mkdir ~/node-latest-install
cd ~/...
How to automatically install Emacs packages by specifying a list of package names?
...n package could automatically search and install the packages, so that I don't need to install them manually by calling M-x package-list-packages . How to do that?
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How do I convert seconds to hours, minutes and seconds?
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By using the divmod() function, which does only a single division to produce both the quotient and the remainder, you can have the result very quickly with only two mathematical operations:
m, s = divmod(seconds, 60)
h, m = divmod(m, 60)
And then use string fo...
Remove Elements from a HashSet while Iterating [duplicate]
...ve(). If an entry is removed via Set.remove() while an iteration is being done, you will get a ConcurrentModificationException. On the other hand, removal of entries via Iterator.remove() while iteration is supported in this case.
The new for loop is nice, but unfortunately it does not work in th...
How to get rid of the 'undeclared selector' warning
...c push #pragma clang diagnostic ignored "-Wundeclared-selector" // Do your thing #pragma clang diagnostic pop
– dizy
Aug 21 '13 at 3:50
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How do you see the entire command history in interactive Python?
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Everytime I forget, how this is done, I come here for the answer, thank you Dennis.
– Felipe Valdes
Feb 11 '18 at 2:31
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How to put a line comment for a multi-line command [duplicate]
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I'm afraid that, in general, you can't do what you're asking for. The best you can do is a comment on the lines before the command, or one single comment at the end of the command line, or a comment after the command.
You can't manage to intersperse comments insi...
'pip' is not recognized as an internal or external command
...setx PATH "%PATH%;C:\Python34\Scripts"
Note:
According to the official documentation, "[v]ariables set with setx variables are available in future command windows only, not in the current command window". In particular, you will need to start a new cmd.exe instance after entering the above comma...
Why would you use an ivar?
... reduce your reference count operations and minimize peak memory usage (if done correctly).
Nontrivial Types
Example: If you have a C++ type, direct access is just the better approach sometimes. The type may not be copyable, or it may not be trivial to copy.
Multithreading
Many of your ivars are cod...