Swift

Generating Random ASCII Strings

See more PRNG Examples

Demonstrates how to generate random us-ascii strings. Swift

func chilkatTest() {
    var success: Bool = false

    // This example assumes the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    success = false

    let fortuna = CkoPrng()!

    var bDigits: Bool
    var bLowercase: Bool
    var bUppercase: Bool

    // Generate random strings having only lowercase chars (a-z)
    // Disallow digits and uppercase and only allow lowercase
    bDigits = false
    bUppercase = false
    bLowercase = true

    var i: Int

    print("-- only lowercase alpha (a-z)")
    for i = 1; i <= 10; i++ {
        // Generate 20-character strings.
        print("\(fortuna.randomString(length: 20, bDigits: bDigits, bLower: bLowercase, bUpper: bUppercase)!)")
    }

    // Allow both lowercase and uppercase alpha chars
    bUppercase = true
    print("-- lower and uppercase alpha (a-zA-Z)")
    for i = 1; i <= 10; i++ {
        // Generate 20-character strings.
        print("\(fortuna.randomString(length: 20, bDigits: bDigits, bLower: bLowercase, bUpper: bUppercase)!)")
    }

    // Allow digits (0-9)
    bDigits = true
    print("-- digits and lower/uppercase alpha (0-9a-zA-Z)")
    for i = 1; i <= 10; i++ {
        // Generate 20-character strings.
        print("\(fortuna.randomString(length: 20, bDigits: bDigits, bLower: bLowercase, bUpper: bUppercase)!)")
    }

    // Allow only digits (0-9)
    bUppercase = false
    bLowercase = false
    print("-- only digits (0-9)")
    for i = 1; i <= 10; i++ {
        // Generate 20-character strings.
        print("\(fortuna.randomString(length: 20, bDigits: bDigits, bLower: bLowercase, bUpper: bUppercase)!)")
    }


}