I'm trying to add an extension method in Array like so:
extension Array {
func contains(obj: T) -> Bool {
let filtered = self.filter {$0 == obj}
return filtered.count > 0
}
}
But self.filter {$0 == obj}
don't work. Compiler error:
could not find an overload for '==' that accepts the supplied arguments
you don't actually need to write an extension, you can use the global func contains
from the Swift library:
contains([1,2,3], 1)