I give you nested computed properties in functions:
import Foundation func f() { var s: String { return "\(Date())" } print(s) sleep(2) print(s) } f()
Yeah.
Today’s is courtesy of Mike Ash.
I give you nested computed properties in functions:
import Foundation func f() { var s: String { return "\(Date())" } print(s) sleep(2) print(s) } f()
Yeah.
Today’s is courtesy of Mike Ash.
6 Comments
You can even add willSet/didSet in a local variable. Handy if, for example, you want to update an NSProgress every few thousand iterations (to avoid locking costs in NSProgress) from within a hot and long-running loop.
MAGIC!
How about putting them in a loop 😉
import Foundation
for _ in 1...5 {
var s: String { return "\(Date())" }
print(s)
sleep(2)
print(s)
}
It works great using the 8.3.2 toolchain, but it crashes the playground if you try to use the latest 2017-04-24 (a) toolchain.
If it’s legal, why is it a Bad Thing?
why is it bad thing??