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Select rows which are not present in other table
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+500
There are basically 4 techniques for this task, all of them standard SQL.
NOT EXISTS
Often fastest in Postgres.
SELECT ip
FROM ...
What, exactly, is needed for “margin: 0 auto;” to work?
I know that setting margin: 0 auto; on an element is used to centre it (left-right). However, I know that the element and its parent must meet certain criteria for the auto margin to work, and I can never seem to get the magic right.
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Angularjs if-then-else construction in expression
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Rafael Almeida
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answered May 16 '13 at 11:16
Andre GoncalvesAndr...
Android : Check whether the phone is dual SIM
... telephonyInfo.imeiSIM1 = getDeviceIdBySlot(context, "getDeviceIdGemini", 0);
telephonyInfo.imeiSIM2 = getDeviceIdBySlot(context, "getDeviceIdGemini", 1);
} catch (GeminiMethodNotFoundException e) {
e.printStackTrace();
try {
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SQLite Reset Primary Key Field
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answered Oct 21 '09 at 16:03
Nick DandoulakisNick Dandoulakis
39.7k1414 gold badges9494 silver badges135135 bronze badges
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Convert an integer to a float number
...about this. a := uint(8); b := uint(5); c := float32(a/b) will make c be 1.00000, not 1.6.
– isomorphismes
Nov 9 '19 at 20:00
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Most efficient way of making an if-elif-elif-else statement when the else is done the most?
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100
The code...
options.get(something, doThisMostOfTheTime)()
...looks like it ought to be faste...
Converting file size in bytes to human-readable string
...ng, floppy disks use a mixture of the two systems - their 1MB is actually 1024000 bytes.
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Chmod recursively
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edited Nov 14 '12 at 11:30
answered Nov 14 '12 at 11:23
Fr...
Are the shift operators () arithmetic or logical in C?
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Basically you need to either test your compiler or not rely on it. My VS2008 help for the current MS C++ compiler says that their compiler does an arithmetic shift.
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