I can't figure out how to fix it. I just want to understand how it works and what should be replaced.
I've already tried to delete characters., but it still doesn't work.
import Foundation
var shrinking = String("hello")
repeat {
print(shrinking)
shrinking = String(shrinking.characters.dropLast())
}
while shrinking.characters.count > 0
I expected the program to output:
hello
hell
hel
he
h
but it doesn't work at all.
Your code should work as it is if you delete the characters I suggest you create a new playground file. Btw you can simply use RangeReplaceableCollection mutating method popLast and iterate while your string is not empty to avoid calling your collection count property multiple times:
var shrinking = "hello"
repeat {
print(shrinking)
shrinking.popLast()
} while !shrinking.isEmpty
This will print
hello
hell
hel
he
h
or using removeLast method but it requires the string not to be empty so you would need to check if the string is empty at before the closure:
var shrinking = "hello"
while !shrinking.isEmpty {
print(shrinking)
shrinking.removeLast()
}