In Swift, how to convert String to Int for base 2 though base 36 like Long.parseLong in Java?

Question

How do I convert a String to a Long in Swift?

In Java I would do Long.parseLong("str", Character.MAX_RADIX).

Answer 1

As noted here, you can use the standard library function strtoul():

let base36 = "1ARZ"
let number = strtoul(base36, nil, 36)
println(number) // Output: 60623

The third parameter is the radix. See the man page for how the function handles whitespace and other details.

Answer 2

We now have these conversion functions built-in in Swift Standard Library:

Encode using base 2 through 36: https://developer.apple.com/documentation/swift/string/2997127-init Decode using base 2 through 36: https://developer.apple.com/documentation/swift/int/2924481-init