Question

How to find the position of the first occurrence of a substring in a string with Swift

Answer 1

import Foundation

let str = "I bought running shoes, but they started running alone, now we are both happy"
let substring = "running"

// Find the position of the first occurrence of a substring
if let position = str.range(of: substring)?.lowerBound {
    print(str.distance(from: str.startIndex, to: position))
} else {
    print(-1)
}


/*
run:

9

*/

 

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