Can OR statements be concatenated in Swift?

Question

In Swift, is it possible to turn

if (a == b) || (a == c) || (a == d) {}

into something like the following?

if a == (b || c || d) {}

score 4 · Answer 1 · answered Feb 14 '18 at 19:37

4

You cannot combine the clauses that way, but this might work for you:

if [b, c, d].contains(a) { ... }

answered Feb 14 '18 at 19:37

rob mayoff

1

`contains()` has now changed to `contains(where:)`. So should it be `if [b,c,d].contains(where: {$0 == a})`? – Jack Guo Feb 14 '18 at 19:46
@JGuo: That is not correct. There are two different `contains()` methods. – Martin R Feb 14 '18 at 20:31
@JGuo, if the (inferred) type of the involved objects conforms to `Equatable`, `[b, c, d]` has a `contains(_:)` method. – rob mayoff Feb 14 '18 at 20:54
I see. I am comparing tuples of custom enum type, i.e. `(Character, Weapon)`. That's probably why. Thanks! – Jack Guo Feb 14 '18 at 21:03

1 Answers1