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The best way to remove duplicate values from NSMutableArray in Objective-C?
...ded NSOrderedSet to iOS 5 and Mac OS X 10.7. What had been an algorithm is now two lines of code:
NSOrderedSet *orderedSet = [NSOrderedSet orderedSetWithArray:yourArray];
NSArray *arrayWithoutDuplicates = [orderedSet array];
If you are worried about the order and you're running on iOS 4 or earl...
Good examples of Not a Functor/Functor/Applicative/Monad?
...Wiki for an article on bottom (link) or unsafe functions (link).
I wonder if it is possible to create such a type constructor using a richer type system, such as Agda or Haskell with various extensions.
A type constructor which is an Applicative, but not a Monad:
newtype T a = T {multidimensional...
How do I add 1 day to an NSDate?
...= [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
// now build a NSDate object for the next day
NSDateComponents *offsetComponents = [[NSDateComponents alloc] init];
[offsetComponents setDay:1];
NSDate *nextDate = [gregorian dateByAddingComponents:offsetComponents toDate: [N...
How does the main() method work in C?
I know there are two different signatures to write the main method -
9 Answers
9
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How can Perl's print add a newline by default?
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The real danger comes from the fact that all code will now add newlines, even code in other people's modules that weren't expecting it. Imagine networking code that would have sent the message "helo\r\n" that now sends "helo\r\n\n".
– Chas. Owens
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How do I check if there are duplicates in a flat list?
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Use set() to remove duplicates if all values are hashable:
>>> your_list = ['one', 'two', 'one']
>>> len(your_list) != len(set(your_list))
True
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No internet on Android emulator - why and how to fix? [closed]
...ator command line solved the issue for me. Android had no internet before, now it has. Running on Win10. I'm puzzled why that command line argument was necessary though?
– mipnw
Apr 1 '18 at 3:18
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Rails: around_* callbacks
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Multiple linear regression in Python
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@HuanianZhang what do you mean by confidence level? If you want the coefficient of determination, the score method will do it; sklearn.metrics has some other model evaluation criteria. If you want the stuff like in Akavall's answer, statsmodels has some more R-like diagnostics...
What is the difference between tree depth and height?
... the next, and I'm posting this so everyone is aware that this discrepancy now exists and hopefully won't cause bugs in any programs! Thanks.
From the OpenDSA Data Structures & Algos book:
If n1, n2,...,nk is a sequence of nodes in the tree such
that ni is the parent of ni+1 for 1<=i...