convert NSArray of NSString(s) to NSArray of NSMutableString(s)

Question

How to do that without having to \"scroll\" the entire given array with a \"for\" loop?

Answer 1

The best I can come up with is:

NSMutableArray *replacementArray = [NSMutableArray array];

[originalArray enumerateObjectsUsingBlock:
     ^(id obj, NSUInteger index, BOOL *stop)
     {
          [replacementArray addObject:[[obj mutableCopy] autorelease]];
     }
];

Which more or less just tells the originalArray to construct the for loop for you. And if anything it's more work than:

NSMutableArray *replacementArray = [NSMutableArray array];

for(id obj in originalArray)
   [replacementArray addObject:[[obj mutableCopy] autorelease]];