String slicing substring — Mastering Swift 4 — Fourth Edition

Akarsh SEGGEMU

Oct 5, 2018·1 min read

Code deprecation error in playground when I was trying the example mentioned in the page 79 of the book “Mastering Swift 4 — Fourth Edition”.

The code snippet:

path.substring(to: startIndex)
// returns the “/one”path.substring(from: endIndex)
// returns the “/four”

The following are deprecated in Swift 4,

1. substring(to:)
2. substring(from:)

you get error in playground to change the code and use String slicing subscript with a 'partial range from' operator.

I found the solution for this question on stackoverflow https://stackoverflow.com/questions/45562662/how-can-i-use-string-slicing-subscripts-in-swift-4 solving the code deprecation error.

I used them as follows,

path[…startIndex]
// returns the “/one”path[endIndex…]
// returns the “/four”