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MySQL indexes - what are the best practices?
I've been using indexes on my MySQL databases for a while now but never properly learnt about them. Generally I put an index on any fields that I will be searching or selecting using a WHERE clause but sometimes it doesn't seem so black and white.
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Why use argparse rather than optparse?
... deprecated, and will hopefully go away in the future.
argparse is better for all the reasons listed on its original page (https://code.google.com/archive/p/argparse/):
handling positional arguments
supporting sub-commands
allowing alternative option prefixes like + and /
handling zero-or-more an...
Knight's Shortest Path on Chessboard
I've been practicing for an upcoming programming competition and I have stumbled across a question that I am just completely bewildered at. However, I feel as though it's a concept I should learn now rather than cross my fingers that it never comes up.
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Fastest way to remove first char in a String
...ssign the result to a variable, possibly data itself.)
I wouldn't take performance into consideration here unless it was actually becoming a problem for you - in which case the only way you'd know would be to have test cases, and then it's easy to just run those test cases for each option and compa...
Which Boost features overlap with C++11?
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Replaceable by C++11 language features or libraries
Foreach → range-based for
Functional/Forward → Perfect forwarding (with rvalue references, variadic templates and std::forward)
In Place Factory, Typed In Place Factory → Perfect forwarding (at least for the documented ...
What is the difference between lock and Mutex?
...c to the AppDomain, while Mutex to the Operating System allowing you to perform inter-process locking and synchronization (IPC).
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fatal: Not a valid object name: 'master'
... it to be called "main"? There's no way to start off with a different name for the first branch-pointer? No "git init" parameters? Could I maybe go change the name listed in .git/HEAD? Are there some other files I would need to alter, also?
– Jemenake
May 13 '1...
How do you list the active minor modes in emacs?
... (message "Active modes are %s" active-modes)))
Note: this only works for the current buffer (because the minor modes might be only enabled in certain buffers).
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What's the UIScrollView contentInset property for?
... to me what the contentInset property in a UIScrollView instance is used for? And maybe provide an example?
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A CORS POST request works from plain JavaScript, but why not with jQuery?
...nually specify all the headers you will accept (at least that was the case for me in FF 4.0 & Chrome 10.0.648.204).
jQuery's $.ajax method sends the "x-requested-with" header for all cross domain requests (i think its only cross domain).
So the missing header needed to respond to the OPTIONS r...