Differences between [NSArray arrayWithArray:] and [NSArray copy]

Question

lately I work much with arrays and I\'m wonder.. what\'s diffrences between those two lines.

NSArray *array = [NSArray arrayWithArray:someArray];

Answer 1

In addition to the other answers, also note, that when someArray is nil, the first line will make array point to an empty array and the second will make it point to nil. This might be an important difference, especially in mutable arrays.