Question

How to check if a string is a rotation of another string in Swift

Answer 1

func isRotation(_ s1: String, _ s2: String) -> Bool {
    return (s1.count == s2.count) && (s1 + s1).contains(s2)
}

var s1 = "abbc"
var s2 = "cabb"
print(isRotation(s1, s2) ? "yes" : "no")

s1 = "abbc"
s2 = "bbac"
print(isRotation(s1, s2) ? "yes" : "no")



/*
run:

yes
no

*/

 

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