For Loops 2

acdotcom-st-for-loops2.swift

// /////////////////////////////////////////////////////////
// For Loops 2
// /////////////////////////////////////////////////////////

import Foundation

/// Use of .some in For loop with `for case let`

func usingForCaseLet() {
    print("\n-----------Result for function \(#function) -----------")
    // .some
    let data: [Any?] = ["IronMan", nil, 1989, "SpiderMan#1"]
    for case let .some(element) in data {
     print(element)
    }

    // .optional
    for case let element? in data {
     print("With ? \(element)")
    }
}

usingForCaseLet()


/// Using `case let` to filter the array

func usingForCaseLetForFiltering() {
    print("\n-----------Result for function \(#function) -----------")
    enum CarState {
        case running(speed: Int)
        case stopped
        case idling
    }
    
    let runningSpeeds: [CarState] = [
                                        .running(speed: 40), .stopped,
                                        .idling, .running(speed: 90), .idling,
                                        .running(speed: 10)
                                        ]
    for case let .running(speed) in runningSpeeds {
        print("speed is \(speed)")
    }
}

usingForCaseLetForFiltering()