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How to calculate time in hours between two dates in iOS
...enDates = [date1 timeIntervalSinceDate:date2];
double secondsInAnHour = 3600;
NSInteger hoursBetweenDates = distanceBetweenDates / secondsInAnHour;
See, the apple reference library http://developer.apple.com/library/mac/navigation/
or if you are using Xcode just select help/documentation from th...
How do I update if exists, insert if not (AKA “upsert” or “merge”) in MySQL?
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edited Jul 15 at 20:25
answered Aug 2 '09 at 13:35
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Append TimeStamp to a File Name
...Time.Now.ToString("yyyyMMddHHmmssfff")
or string.Format
string.Format("{0:yyyy-MM-dd_HH-mm-ss-fff}", DateTime.Now);
or Interpolated Strings
$"{DateTime.Now:yyyy-MM-dd_HH-mm-ss-fff}"
There are following custom format specifiers y (year), M (month), d
(day), h (hour 12), H (hour 24), m (min...
Create an array with random values
How can I create an array with 40 elements, with random values from 0 to 39 ?
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21 Answers
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How to throw a C++ exception
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#include <stdexcept>
int compare( int a, int b ) {
if ( a < 0 || b < 0 ) {
throw std::invalid_argument( "received negative value" );
}
}
The Standard Library comes with a nice collection of built-in exception objects you can throw. Keep in mind that you should always...
How to strike through obliquely with css
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190
There is a hacky way to do this, using the :before pseudo element. You give the :before a border...
How to execute ipdb.set_trace() at will while running pytest tests
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edited Nov 4 '17 at 21:02
ivan_pozdeev
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an...
How to install latest (untagged) state of a repo using bower?
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220
Specify a git commit SHA instead of a version:
bower install '<git-url>#<git-commit-sh...
How can I check the size of a collection within a Django template?
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MichielB
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answered May 23 '09 at 17:53
Alex MartelliAlex Mar...
Check if a given Type is an Enum
... Ry-♦Ry-
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