Combine 실습 9

import Combine

var subscriptions = Set<AnyCancellable>()


// removeDuplicates
let words = "hey hey there! Mr Mr ?"
				.components(seperatedBy: " ")
                .publisher
words
	.removeDuplicates()
    .sink { value in
    	print(value)
    }.store(in: &subscriptions)


// compactMap

let strings = ["a", "1.24", "3", "def", "45", "0.23"].publisher

strings
	.compactMap { Float($0) }
    .sink { value in
    	print(value)
    }.store(in: &subscriptions)    


// ignoreOutput

let numbers = (1...10_000).publisher

numbers
	.ignoreOutput()
    .sink(receiveCompletion: { print("Completed with: \($0)")},
    receiveValue: { print($0) })
    .store(in: &subscriptions)


// prefix

let tens = (1...10).publisher

tens
	.prefix(2)
    .sink(receiveCompletion: { print("Completed with: \($0)") },
    receiveValue: { print($0) })
    .store(in: &subscriptions)