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How would I get a cron job to run every 30 minutes?
... "run when the minute of each hour is 30" (would run at: 1:30, 2:30, 3:30, etc)
example #2
*/30 * * * * your_command
this means "run when the minute of each hour is evenly divisible by 30" (would run at: 1:30, 2:00, 2:30, 3:00, etc)
example #3
0,30 * * * * your_command
this means "run when the...
C/C++ include header file order
...ers from other non-standard, non-system libraries (for example, Qt, Eigen, etc).
Headers from other "almost-standard" libraries (for example, Boost)
Standard C++ headers (for example, iostream, functional, etc.)
Standard C headers (for example, cstdint, dirent.h, etc.)
If any of the headers have a...
Can someone explain this 'double negative' trick? [duplicate]
...single operand can be converted to true; otherwise, returns true.
So if getContext gives you a "falsey" value, the !! will make it return the boolean value false. Otherwise it will return true.
The "falsey" values are:
false
NaN
undefined
null
"" (empty string)
0
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Dismissing a Presented View Controller
...esented, pushed onto a navigation controller, part of a tab bar controller etc. Using the delegate allows the "presenting" view controller to "dismiss" the view controller using the inverse of whatever method was used to present it.
– David Smith
Aug 2 '19 at 1...
What is Bootstrap?
...s it's suited best for? (Ie. Temporary sites, small web apps, micro sites, etc?)
– Chuck Le Butt
Jan 28 '16 at 14:58
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Building a notification system [closed]
...em on the server (how to store notifications, where to store them, how to fetch them etc...).
4 Answers
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What are the most widely used C++ vector/matrix math/linear algebra libraries, and their cost and be
... rendering (such as planes, AABB, quatenrions with multiple interpolation, etc) that aren't in any other packages. Very low memory overhead, quite fast, easy to use.
Downsides: API is very focused specifically on rendering and graphics. Doesn't include general purpose (NxM) matrices, matrix decom...
How to get UTF-8 working in Java webapps?
... in my Java webapp (servlets + JSP, no framework used) to support äöå etc. for regular Finnish text and Cyrillic alphabets like ЦжФ for special cases.
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How to create separate AngularJS controller files?
...e sure myApp.js is after AngularJS but before any controllers / services / etc...otherwise angular won't be able to initialize your controllers.
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Convert base class to derived class [duplicate]
...e, compared to other solution (like writing a.prop1=b.pro1, a.pro2=b.prop2 etc.)
– nivs1978
Jan 13 at 13:18
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