What's the quickest way to compare a NSUInteger with an int (e.g. 5) in objective-c?

Question

What's the quickest way to compare a NSUInteger with an int (e.g. 5) in objective-c?

Background - I'm noting that the following line of code gives an error:

STAssertEquals([nsMutableArrayInstance count], 5, @"xxxx");
// gives Type Mismatch

So what I'm asking effectively is how to correct this to fix the error...

Eimile

Answer 1

NSUInteger i = 42;
int j = 5;

if (i > j) {
  NSLog(@"the universe has not ended yet");
}

Instead of using STAssertEquals, you could use STAssertTrue:

STAssertTrue([nsMutableArrayInstance count] == 5, @"xxxx");

Esposito

You should also just be able to do STAssertEquals([nsMutableArrayInstance count], (NSUInteger)5, @"xxxx"). – Meyerhof

The problem with the STAssertTrue is that when it fails, it won't say what the actual value was. – Arundel

I encourage using 5U as @JonReid suggests. – Anette

Answer 2

STAssertEquals requires that you compare like types to like types. So add "U" to the number to make it an unsigned literal:

STAssertEquals([nsMutableArrayInstance count], 5U, nil);

Alternatively, you could use OCHamcrest to say:

assertThat(nsMutableArrayInstance, hasCountOf(5));

Arundel

Answer 3

Use

STAssertEquals([nsMutableArrayInstance count], (NSUInteger)5, @"xxxx");

(NSUInteger)5 does not look as clean as 5U but it will also work correctly when compiling for 64-bit.

Samathasamau