objective c - Inline condition checking - what is it?

Question

Please forgive the title, it's probably wrong, since I don't know anything about it. Because of that, I didn't have any search terms to look it up, so could someone explain me what does this mean and how to use it? I just picked this example as I recently found it.

id item = [arr count] > 0 ? arr[0] : nil;

This is use of a ternary operator, also called conditional operator, inline if (iif), or ternary if. — David Zech, May 15 '14 at 17:03
@pennstatephil You referenced a C# doc for an Objective C question? — Mike D, May 15 '14 at 17:07

score 4 · Accepted Answer · answered May 15 '14 at 17:03

4

This line is the same as

id item;
if ([arr count] > 0) {
   item = arr[0];
}else{
   item = nil;
}

answered May 15 '14 at 17:03

Yan

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Except you probably want to declare `item` *before* the if statement if you want to use it afterwards. – Mike D May 15 '14 at 17:05
@MikeD you are right. I updated the answer. – Yan May 15 '14 at 17:09

objective c - Inline condition checking - what is it?

1 Answers1