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How to count occurrences of a column value efficiently in SQL?
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263
This should work:
SELECT age, count(age)
FROM Students
GROUP by age
If you need the id...
C++ compiling on Windows and Linux: ifdef switch [duplicate]
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use:
#ifdef __linux__
//linux code goes here
#elif _WIN32
// windows code goes here
#else
#endif
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Untrack files from git temporarily
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742
git update-index should do what you want
This will tell git you want to start ignoring the chan...
Lambda expression to convert array/List of String to array/List of Integers
...like this:
//for lists
List<String> stringList = Arrays.asList("1","2","3");
List<Integer> integerList = convertList(stringList, s -> Integer.parseInt(s));
//for arrays
String[] stringArr = {"1","2","3"};
Double[] doubleArr = convertArray(stringArr, Double::parseDouble, Double[]::ne...
Cross-browser multi-line text overflow with ellipsis appended within a fixed width and height
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25 Answers
25
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What is the maximum depth of the java call stack?
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62
It depends on the amount of virtual memory allocated to the stack.
http://www.odi.ch/weblog/pos...
See all breakpoints in Visual Studio 2010+
Is there a window in Visual Studio 2010 and newer where I can see all the breakpoints that I have in my project or solution?
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Why do python lists have pop() but not push()
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253
Because "append" existed long before "pop" was thought of. Python 0.9.1 supported list.append ...
How can I push a local Git branch to a remote with a different name easily?
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Note that this used to be called tracking not upstream before Git 1.7.4.2, so if you're using an older version of Git, use tracking instead. The push.default option was added in Git 1.6.4, so if you're on an older version than that, you won't have this option at all and will need to explicitly sp...
Windows batch: call more than one command in a FOR loop?
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edited Jan 21 '14 at 10:08
Steven
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