CODEWITHSUNDEEP
objective-c
user2374693
user2374693

Reputation: 163

Number of rows in multi dimensional array in Objective-C

Is it possible to get number of rows in multi dimensional array?

Eg:

NSString *array[][2]={{@"1", @"2"},{@"1", @"2"}}

Not number of columns (2) but number of rows.

Upvotes: 1

Views: 82

Answers (2)

Duncan C
Duncan C

Reputation: 131398

You are using C arrays of NSObjects, which is not recommended. I believe that will cause your NSNumbers to be zombies, since the Objective C runtime doesn't know how to memory-manage pointers to objects that are inside C arrays or structs. Thus it won't be aware that those objects are owned, and they will get deallocated.

It might be that Apple has solved this problem, but I don't think so.

Apparently I was wrong. It seems that the runtime does know how to memory-manage C arrays of object pointers, at least static-sized ones. Interesting. It still can't handle objects inside C structs however. Interesting.

Upvotes: 0

Cy-4AH
Cy-4AH

Reputation: 4586

const int numRows = sizeof(array)/sizeof(0[array]);

But may be it will be better to use NSArray:

NSArray* array = @[@[@"1", @"2"], @[@"1", @"2"]];

Upvotes: 2

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