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How to find if a given key exists in a C++ std::map
...a particular key exists."
The documentation for map::count says: "Because all elements in a map container are unique, the function can only return 1 (if the element is found) or zero (otherwise)."
To retrieve a value from the map via a key that you know to exist, use map::at:
value = m.at(key)
...
Script not served by static file handler on IIS7.5
... more often than not you need to run
aspnet_regiis.exe -i
after installing asp.net. Maybe I would do it anyway now.
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What is a typedef enum in Objective-C?
I don't think I fundamentally understand what an enum is, and when to use it.
13 Answers
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No increment operator (++) in Ruby? [duplicate]
... Regarding point #3, since most things are objects, imagine if Ruby allowed you to do this: 1++ 1+2 # Would not be 3!
– Johntron
Feb 5 '13 at 13:46
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Why .NET String is immutable? [duplicate]
As we all know, String is immutable. What are the reasons for String being immutable and the introduction of StringBuilder class as mutable?
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“register” keyword in C?
... a processor register if possible.
Most modern compilers do that automatically, and are better at picking them than us humans.
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How can I repeat a character in Bash?
...ay matter with large repeat counts).
Summary:
If your repeat count is small, say up to around 100, it's worth going with the Bash-only solutions, as the startup cost of external utilities matters, especially Perl's.
Pragmatically speaking, however, if you only need one instance of repeating ch...
Find Results not displaying Results
...ws displays summary information, but not the actual lines matched. This is all my Find Results window displays:
7 Answers
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How do I create a readable diff of two spreadsheets using git diff?
...e a lot of spreadsheets (xls) in our source code repository. These are usually edited with gnumeric or openoffice.org, and are mostly used to populate databases for unit testing with dbUnit . There are no easy ways of doing diffs on xls files that I know of, and this makes merging extremely tedio...
UIButton: set image for selected-highlighted state
....highlighted])
To set the background image we can use setBackgroundImage(_:for:)
Swift 2.x
// Normal
button.setImage(UIImage(named: "image1"), forState: .Normal)
// Highlighted
button.setImage(UIImage(named: "image2"), forState: .Highlighted)
// Selected
button.setImage(UIImage(named: "image3"...