ddunbar

import Foundation

struct X: Equatable, ExpressibleByStringLiteral {
    let strings: Set<String>

    init?(_ characters: String.CharacterView) {
        let strings = Set<String>(String(characters).components(separatedBy: ",").map{ String($0) })
        if strings.isEmpty {
            return nil
        }        

ddunbar

$ cat ~/bin/status
#!/bin/sh

if [ $# -lt 2 ]; then
    echo "Usage: $(basename $0) <exit-code> <name ...>"
    echo
    echo "This script is intended to be used along with a shell alias"
    echo "such as:"
    echo "  alias status='status $?'"
    echo "which will automatically add the last exit code."