khanlou

extension Character: Strideable {
    public typealias Stride = Int

    public func distance(to other: Character) -> Character.Stride {
        guard let first = self.unicodeScalars.first else {
            fatalError()
        }
        guard let other = other.unicodeScalars.first else {
            fatalError()
        }

kristopherjohnson

import QuartzCore

func executionTimeInterval(block: () -> ()) -> CFTimeInterval {
    let start = CACurrentMediaTime()
    block();
    let end = CACurrentMediaTime()
    return end - start
}

tsiege

ANNOUNCEMENT

I have moved this over to the Tech Interview Cheat Sheet Repo and has been expanded and even has code challenges you can run and practice against!






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