objective c - Differences between [NSArray arrayWithArray:] and [NSArray copy] -

objective c - Differences between [NSArray arrayWithArray:] and [NSArray copy] -

lately work much arrays , i'm wonder.. what's diffrences between 2 lines.

nsarray *array = [nsarray arraywitharray:somearray];

and

nsarray *array = [somearray copy];

which of faster? in case have nsmutablearray , mutablecopy?

which of faster?

don't worry it. premature optimization.

the main difference: first approach results in autoreleased "copy" don't own , don't have release, while own object created on sec line. both arrays immutable, way.

objective-c cocoa-touch cocoa nsmutablearray nsarray