Ramūnas ramunasjurgilas
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| let strings1 = PassthroughSubject<String, Never>() | |
| let strings2 = PassthroughSubject<String, Never>() | |
| strings1 | |
| .merge(with: strings2) | |
| .sink { print($0) } | |
| strings2.send("A") | |
| strings1.send("B") |
ramunasjurgilas
/ SwitchToLatest.swift
Last active
February 27, 2020 12:30
Combining operator: switchToLatest()
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| let intPublisher1 = PassthroughSubject<Int, Never>() | |
| let intPublisher2 = PassthroughSubject<Int, Never>() | |
| let publishers = PassthroughSubject<PassthroughSubject<Int, Never>, Never>() | |
| publishers.switchToLatest().sink { print($0) } | |
| publishers.send(intPublisher1) | |
| intPublisher1.send(-3) |
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| let integers = (10...12).publisher // A | |
| let moreIntegers = (20...22).publisher // F | |
| integers | |
| .append(1, 2) // B | |
| .append(99...101) // C | |
| .append([-100, -200]) // D | |
| .append(moreIntegers) // E | |
| .sink { print($0) } |
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| let integers = (10...12).publisher // F | |
| let moreIntegers = (20...22).publisher // A | |
| integers | |
| .prepend(1, 2) // B | |
| .prepend(99...101) // C | |
| .prepend([-100, -200]) // D | |
| .prepend(moreIntegers) // E | |
| .sink { print($0) } |
ramunasjurgilas
/ PrefixUntilOutputFrom.swift
Created
February 27, 2020 08:21
prefix(untilOutputFrom:) as filtering operator
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| let on = PassthroughSubject<Void, Never>() | |
| let strings = PassthroughSubject<String, Never>() | |
| strings | |
| .prefix(untilOutputFrom: on) | |
| .sink(receiveValue: { print($0) }) | |
| ["a1", "b1", "c3", "d1", "e5"] | |
| .forEach { | |
| strings.send($0) |
ramunasjurgilas
/ PrefixWhile.swift
Created
February 27, 2020 08:05
prefix(while:) as filtering operator
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| let strings = PassthroughSubject<String, Never>() | |
| strings | |
| .prefix(while: { $0.hasSuffix("1") }) | |
| .sink(receiveValue: { print($0) }) | |
| ["a1", "b1", "c3", "d1", "e5"] | |
| .forEach { | |
| strings.send($0) | |
| } |
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| let strings = PassthroughSubject<String, Never>() | |
| strings | |
| .prefix(3) | |
| .sink(receiveValue: { print($0) }) | |
| ["a", "b", "c", "d", "e"] | |
| .forEach { | |
| strings.send($0) | |
| } |
ramunasjurgilas
/ DropUntilOutputFrom.swift
Created
February 27, 2020 07:40
dropUntilOutputFrom() as filtering operator
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| let on = PassthroughSubject<Void, Never>() | |
| let strings = PassthroughSubject<String, Never>() | |
| strings | |
| .drop(untilOutputFrom: on) | |
| .sink(receiveValue: { print($0) }) | |
| ["a0", "a1", "b2", "a3", "c4", "a5", "d6"] | |
| .forEach { | |
| strings.send($0) |
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| import Combine | |
| ["a0", "a1", "b2", "a3", "c4", "a5", "d6"] | |
| .publisher | |
| .drop(while: { $0.hasPrefix("a") }) | |
| .sink { print($0) } | |
| // Output: | |
| // b2 | |
| // a3 |
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| [1, 2, 3] | |
| .publisher | |
| .dropFirst() | |
| .sink { print($0) } | |
| // Output: | |
| // 2 | |
| // 3 |
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