How to use conditional operator (? :) in swift4

Question

When I use conditional operator in Swift, like this: let foo = array.count < 0? 0 : array.count I got error:

Consecutive statements on a line must be separated by ';'

I know that ? in swift is used to unwrap optional.

Should I use this operator in swift?

If I can, how?

https://stackoverflow.com/questions/31301715/what-are-the-rules-for-spaces-in-swift — Martin R, Dec 04 '17 at 03:49
In swift sometimes a space can cause problem, cannot write randomly like obj-c — Tj3n, Dec 04 '17 at 03:50
How would you expect to an array to have less than 0 elements? Couldn't you find a better example than that? — Leo Dabus, Dec 04 '17 at 03:56
As @LeoDabus says, this is somewhat nonsensical, since `array.count` will never be less than 0. However, for cases where a value legitimately can be negative and you want to bound it, the `max` function is a better choice, i.e.: `let foo = max(somePossibleNegative, 0)` — Charles Srstka, Dec 04 '17 at 03:58
Sorry, this is just a sample, I will not do it in my code, thx! @LeoDabus — XM Zhang, Dec 04 '17 at 05:46

score 6 · Accepted Answer · answered Dec 04 '17 at 04:19

6

spacing should be either

let foo = array.count < 0 ? 0 : array.count

or

let foo = array.count<0 ? 0:array.count

answered Dec 04 '17 at 04:19

Rukshan

1 Answers1