As the title states, if I pass in an empty NSIndexSet to objectsAtIndexs: method in NSArray, does it return nil, or an empty NSArray?
Thanks!
As the title states, if I pass in an empty NSIndexSet to objectsAtIndexs: method
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As the title states, if I pass in an empty NSIndexSet to objectsAtIndexs: method in NSArray, does it return nil, or an empty NSArray?
Thanks!
The documentation states that you will get an array returned, as long as your index set doesn’t contain an index that exceeds the bounds of the array, and the index set isn’t nil. It’d be cheeky of them to return a nil array if the index set was deemed valid, as that’s not what the contract between the caller and the receiver states.
As such, you’ll get an empty array returned.
Source: https://developer.apple.com/library/ios/documentation/Cocoa/Reference/Foundation/Classes/NSArray_Class/NSArray.html#//apple_ref/occ/instm/NSArray/objectsAtIndexes: