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How to determine if an NSDate is today?
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In macOS 10.9+ & iOS 8+, there's a method on NSCalendar/Calendar that does exactly this!
- (BOOL)isDateInToday:(NSDate *)date
So you'd simply do
Objective-C:
BOOL today = [[NSCalendar currentCalendar] isDateInToday:date];
Swift 3:
let today = Calendar.current.isDateInToday(date)
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Setting an int to Infinity in C++
... you really need infinity, use a floating point number type, like float or double. You can then get infinity with:
double a = std::numeric_limits<double>::infinity();
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Easy way to pull latest of all git submodules
...r git 1.7.3 or above you can use (but the below gotchas around what update does still apply):
git submodule update --recursive
or:
git pull --recurse-submodules
if you want to pull your submodules to latest commits instead of the current commit the repo points to.
See git-submodule(1) for det...
Which C++ idioms are deprecated in C++11?
With the new standard, there are new ways of doing things, and many are nicer than the old ways, but the old way is still fine. It's also clear that the new standard doesn't officially deprecate very much, for backward compatibility reasons. So the question that remains is:
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Variable length (Dynamic) Arrays in Java
...u silently, but you could get some weird behavior depending on what you're doing.
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Getting an object from an NSSet
If you can't get an object with objectAtIndex: from an NSSet then how do you retrieve objects?
8 Answers
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How to write a Ruby switch statement (case…when) with regex and backreferences?
...to use the match data in my return statement. Something like this semi-pseudocode:
2 Answers
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Is Integer Immutable
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Immutable does not mean that a can never equal another value. For example, String is immutable too, but I can still do this:
String str = "hello";
// str equals "hello"
str = str + "world";
// now str equals "helloworld"
str was not...
How many threads is too many?
...send each action of into a separate thread when the request is received. I do this because almost every request makes a database query. I am using a threadpool library to cut down on construction/destruction of threads.
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Search for executable files using find command
...be answered without involving external utilities.
Thus, the best -perm can do (by itself) is an approximation of -executable. Perhaps a closer approximation than -perm +111 is -perm -111, so as to find files that have the executable bit set for ALL security principals (user, group, other) - this str...