ngtk
commented
5 years ago Gen
Article: https://www.pointfree.co/blog/posts/27-open-sourcing-gen Code: https://github.com/pointfreeco/swift-gen
It provides an intermediate state to process a random value, which can be described like a pipeline.
let digit = Gen.int(in: 0...9) // Gen<Int>
let stringDigit = digit.map(String.init) // Gen<String>
stringDigit.run() // "7"
stringDigit.run() // "1"
stringDigit.run() // "3"// Take a generator of random letters and numbers.
let password = Gen.letterOrNumber
// Generate 6-character strings of them.
.string(of: .always(6))
// Generate 3 segments of these strings.
.array(of: .always(3))
// And join them.
.map { $0.joined(separator: "-") }
password.run() // "9BiGYA-fmvsOf-VYDtDv"
password.run() // "dS2MGr-FQSuC4-ZLEicl"
password.run() // "YusZGF-HILrCo-rNGfCA"
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