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How do I check if a variable exists in a list in BASH
...for this expression. Note: I guess it's a regex expression (starts with ^ etc) but I don't know what =~ means. So I'd love an overall explanation:P
– Ali Yılmaz
Nov 13 '18 at 9:48
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Language Books/Tutorials for popular languages
...learn C++, read Stroustrup. If you want to learn Lisp/Scheme, read SICP. Etc.
If you're not willing to spend more than $30 and a few hours to learn a language, you probably aren't going to learn it.
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What is the difference between a deep copy and a shallow copy?
... which stores multiple data items. In python we have tuple,list,dictionery,etc
– Murphy
Aug 9 '16 at 3:58
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PostgreSQL error: Fatal: role “username” does not exist
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It is impossible to run sudo etc as user postgres... How to install a program? See this S2geometry installation problem.
– Peter Krauss
Oct 17 '18 at 15:06
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Xcode build failure “Undefined symbols for architecture x86_64”
...on
I had several targets in Xcode with several schemas ( Production , Dev etc ) .. some of my newly added implementation ( Class.m ) were missing in
Xcode->Targets->Build Phases->Compile Sources
So I had to add them manually.
then I could compile & build successfully.
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Why is sizeof considered an operator?
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int a;
printf("%d\n", sizeof a);
Function does have entry point, code, etc. Function is to be run at runtime (or inlined), sizeof has to be determined at compile-time.
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Regular Expression For Duplicate Words
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Great, works with apostrophes/hyphens/etc. too - thanks!
– user993683
May 13 '15 at 0:45
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Setting the zoom level for a MKMapView
...(ZoomLevel)
@property (assign, nonatomic) NSUInteger zoomLevel;
- (void)setCenterCoordinate:(CLLocationCoordinate2D)centerCoordinate
zoomLevel:(NSUInteger)zoomLevel
animated:(BOOL)animated;
@end
@implementation MKMapView (ZoomLevel)
- (void)setZoomLevel:(NS...
What's the difference between a continuation and a callback?
...* y;
}
Now if every operation (including addition, multiplication, etc.) were written in the form of functions then we would have:
console.log(pythagoras(3, 4));
function pythagoras(x, y) {
return add(square(x), square(y));
}
function square(x) {
return multiply(x, x);
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Best way to stress test a website [duplicate]
...asy to record scenarios for virtual users. I tested my SPA (with requirejs etc.) and it works.
– opengrid
Jan 15 '13 at 13:15
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