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Choosing between std::map and std::unordered_map [duplicate]
Now that std has a real hash map in unordered_map , why (or when) would I still want to use the good old map over unordered_map on systems where it actually exists? Are there any obvious situations that I cannot immediately see?
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Extract substring in Bash
Given a filename in the form someletters_12345_moreleters.ext , I want to extract the 5 digits and put them into a variable.
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Visual Studio appears to randomly adopt American keyboard layout
Gah! This is really causing me hassle today. Suddenly without warning '@' (at symbol) and '"' (double quote) are trading places on my keyboard but ONLY in Visual Studio 2008!
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How do I concatenate const/literal strings in C?
I'm working in C, and I have to concatenate a few things.
17 Answers
17
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A weighted version of random.choice
I needed to write a weighted version of random.choice (each element in the list has a different probability for being selected). This is what I came up with:
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Allow anything through CORS Policy
How can I disable cors? For some reason I wild carded the allowed origins and headers yet my ajax requests still complain that the origin was not allowed by my CORS policy....
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Why does parseInt(1/0, 19) return 18?
I have an annoying problem in JavaScript .
4 Answers
4
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Check if a value is in an array (C#)
How do I check if a value is in an array in C#?
10 Answers
10
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Difference between CR LF, LF and CR line break types?
...'d like to know the difference (with examples if possible) between CR LF (Windows), LF (Unix) and CR (Macintosh) line break types.
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How can I have a newline in a string in sh?
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The solution is to use $'string', for example:
$ STR=$'Hello\nWorld'
$ echo "$STR" # quotes are required here!
Hello
World
Here is an excerpt from the Bash manual page:
Words of the form $'string' are treated specially. The word expands to
st...