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What are the main purposes of using std::forward and which problems it solves?
In perfect forwarding, std::forward is used to convert the named rvalue references t1 and t2 to unnamed rvalue references. What is the purpose of doing that? How would that affect the called function inner if we leave t1 & t2 as lvalues?
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What is an idempotent operation?
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In computing, an idempotent operation is one that has no additional effect if it is called more than once with the same input parameters. For example, removing an item from a set can be considered an idempotent operation on the set.
In mathematics, an idempotent operation is one where f(f(x))...
Using sed to mass rename files
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First, I should say that the easiest way to do this is to use the
prename or rename commands.
On Ubuntu, OSX (Homebrew package rename, MacPorts package p5-file-rename), or other systems with perl rename (prename):
rename s/...
How to get all of the immediate subdirectories in Python
...te a simple Python script that will copy a index.tpl to index.html in all of the subdirectories (with a few exceptions).
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Check if passed argument is file or directory in Bash
...extremely simple script in Ubuntu which would allow me to pass it either a filename or a directory, and be able to do something specific when it's a file, and something else when it's a directory. The problem I'm having is when the directory name, or probably files too, has spaces or other escapabl...
Get item in the list in Scala?
How in the world do you get just an element at index i from the List in scala?
4 Answers
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filename and line number of python script
How can I get the file name and line number in python script.
9 Answers
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Haskell: How is pronounced? [closed]
How do you pronounce these functions in the Applicative typeclass:
4 Answers
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Best way to check for “empty or null value”
What is best way to check if value is null or empty string in Postgres sql statements?
10 Answers
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C# Float expression: strange behavior when casting the result float to int
I have the following simple code :
7 Answers
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