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c++11 Return value optimization or move? [duplicate]
...should use std::move and when I should let the compiler optimize... for example:
4 Answers
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How to display gpg key details without importing it?
...sa4096 2012-12-26 [S] [revoked: 2014-03-26]
sub rsa2048 2013-01-23 [S] [expires: 2023-01-21]
sub rsa2048 2013-01-23 [E] [expires: 2023-01-21]
sub rsa4096 2014-03-26 [S] [expires: 2020-09-03]
sub rsa4096 2014-03-26 [E] [expires: 2020-09-03]
sub rsa4096 2014-11-22 [A] [revoked: 2016-03-01]
s...
How to determine if binary tree is balanced?
...at into the programming language of your choice should be trivial.
Bonus exercise: this naive code sketch traverses the tree far too many times when computing the heights. Can you make it more efficient?
Super bonus exercise: suppose the tree is massively unbalanced. Like, a million nodes deep on ...
Split string into an array in Bash
...element in "${array[@]}"
do
echo "$element"
done
To get both the index and the value:
for index in "${!array[@]}"
do
echo "$index ${array[index]}"
done
The last example is useful because Bash arrays are sparse. In other words, you can delete an element or add an element and then the ind...
Can you do this HTML layout without using tables?
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Except when you're using a table for presentational layout rather than tabular data just because it's easier at first pale, in which case you're headed down a dark and dangerous path.
– One Crayon
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Differences between Emacs and Vim
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(the text below is my opinion, it should not be taken as fact or an insult)
With Emacs you are expected to have it open 24/7 and live inside the program, almost everything you do can be done from there. You write your own extension...
Should __init__() call the parent class's __init__()?
... is then also optional whether to use the super identifier, or whether to explicitly name the super class:
object.__init__(self)
In case of object, calling the super method is not strictly necessary, since the super method is empty. Same for __del__.
On the other hand, for __new__, you should in...
Using Sinatra for larger projects via multiple files
...e independent files, so when let's say somebody calls "/" - one action is executed, and if smth like "/posts/2" is received then another action - similar logic that is applied in PHP?
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How to implement one-to-one, one-to-many and many-to-many relationships while designing tables?
Can anyone explain how to implement one-to-one, one-to-many and many-to-many relationships while designing tables with some examples?
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Process all arguments except the first one (in a bash script)
...
Use this:
echo "${@:2}"
The following syntax:
echo "${*:2}"
would work as well, but is not recommended, because as @Gordon already explained, that using *, it runs all of the arguments together as a single argument with spaces, while @ preserves the breaks between ...