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In objectiveC I have an NSArray, let's call it NSArray* largeArray, and I want to get a new NSArray* smallArray with just the first x objects
...OR in the event that largeArray is already size <= x I just want a copy of the largeArray. So truncating any objects after index x.
This approach:
NSArray *smallArray = [largeArray subarrayWithRange:NSMakeRange(0, x)];
Was the answer to this very similar question. But it fails with an error if largeArray is already small.
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The primary difference between NSArray and NSMutableArray is that a mutable array can be changed/modified after it has been allocated and initialized, whereas an immutable array, NSArray , cannot.
arrays can't contain nil. There is a special object, NSNull ( [NSNull null] ), that serves as a placeholder for nil.
An object representing a static ordered collection, for use instead of an Array constant in cases that require reference semantics.
In Objective-C, arrays take the form of the NSArray class. An NSArray represents an ordered collection of objects. This distinction of being an ordered collection is what makes NSArray the go-to class that it is.
You could do this...
NSArray *smallArray = [largeArray subarrayWithRange:NSMakeRange(0, MIN(x, largeArray.count))];
That will take the first x elements or the full array if it's smaller than x.
If largeArray.count is 100.
If x = 110 then it will take the first 100 results. If x = 90 then it will take the first 90 results.
Yep, that works :D
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