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Most efficient way of making an if-elif-elif-else statement when the else is done the most?
...doThisMostOfTheTime)()
...looks like it ought to be faster, but it's actually slower than the if ... elif ... else construct, because it has to call a function, which can be a significant performance overhead in a tight loop.
Consider these examples...
1.py
something = 'something'
for i in xra...
How to overload std::swap()
...ns are seen, the more specific one (this one) will be chosen when swap is called without qualification.
– Dave Abrahams
Apr 17 '11 at 14:24
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Recommended way to get hostname in Java
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Strictly speaking - you have no choice but calling either hostname(1) or - on Unix gethostname(2). This is the name of your computer. Any attempt to determine the hostname by an IP address like this
InetAddress.getLocalHost().getHostName()
is bound to fail in some cir...
Sort a Map by values
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totally ripped this, but credited @CarterPage in the comments (it'll be in an open source project anyway). thanks so much.
– Nathan Beach
Sep 2 '15 at 3:07
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What happens to a github student account's repositories at the end of 2 years?
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Ok, so the user can manually make the repo's public prior to or after the automatic downgrade if they do not desire to pay to access their code again.
– indivisible
Jun 23 '14 at 11:55
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Why Large Object Heap and why do we care?
...used holes), it makes the CPU cache much more efficient. The cache is a really big deal on modern processors, they are an easy order of magnitude faster than the memory bus.
Compacting is done simply by copying bytes. That however takes time. The larger the object, the more likely that the cost ...
How to add a changed file to an older (not last) commit in Git
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Use git rebase. Specifically:
Use git stash to store the changes you want to add.
Use git rebase -i HEAD~10 (or however many commits back you want to see).
Mark the commit in question (a0865...) for edit by changing the word pick at the start of t...
Is Ruby pass by reference or by value?
...en I perform a save on the @user object I lose the errors that were initially stored in the lang_errors variable.
13 An...
Interface Builder: What are the UIView's Layout iOS 6/7 Deltas for?
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This actually refers to the Delta between layout position from iOS6 to iOS7.
In iOS7, some views can hide the status bar or have it transparent and, in effect, it is overlaid on top of your view. So if you put a UI element at (0.0...
What is the difference between a string and a byte string?
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@orety they do have to be encoded somehow internally for exactly that reason, but this isn't expos3s to you from Python code much like you don't have to care about how floating point numbers are stored.
– lvc
Nov 5 '17 at 22:43
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