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What's the simplest way to extract a slice of an NSArray in Objective-C?
(much like the array_slice function in PHP)
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In Objective-C, the compiler generates code that makes an underlying call to the init(objects:count:) method. id objects[] = { someObject, @"Hello, World!", @42 }; NSUInteger count = sizeof(objects) / sizeof(id); NSArray *array = [NSArray arrayWithObjects:objects count:count];
arrays can't contain nil.
You can reverse a NSArray by writing your own loop iterating from the end towards the beginning and using a second array to add the items in reverse order. Or you can simply use - (NSEnumerator *)reverseObjectEnumerator from the NSArray class.
The answer is yes, the order of the elements of an array will be maintained - because an array is an ordered collection of items, just like a string is an ordered sequence of characters...
-[NSArray subarrayWithRange:] Reference:
https://developer.apple.com/documentation/foundation/nsarray/1415157-subarraywithrange
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