Standard way to “clamp” a number between two values in Swift

Question

Given:

let a = 4.2
let b = -1.3
let c = 6.4

I want to know the simplest, Swiftiest way to clamp these values to a given range, say 0...

Answer 1

The shortest (but maybe not most efficient) way to clamp, is:

let clamped = [0, a, 5].sorted()[1]

Source: user tobr in a discussion on Hacker News