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Filtering.swift
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Filtering.swift
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//
// Filtering.swift
// MakingWatchTheBirdie
//
// Created by Andrey Zarembo-Godzyatskiy on 15.09.2023.
//
import Foundation
import Combine
import SwiftUI
extension SwiftCombineDemo {
static var filtering: OperationInfoCollection = OperationInfoCollection(
title: "Filtering",
operations: [
OperationInfo(
title: "Filter",
examples: [
OperationInfoExample(
inputs: [
Input(title: "a", items: [
.item(color: .red, icon: .star),
.item(color: .blue, icon: .triangle),
.delay,
.item(color: .green, icon: .star),
])
], equation: "a.filter( != ▲ )",
output: .publisher { inputs in
inputs["a"]!.filter { $0!.icon != .triangle }
}
)
]),
OperationInfo(
title: "Compact Map",
examples: [
OperationInfoExample(
inputs: [
Input(title: "a", items: [
.item(color: .red, icon: .star),
.nil,
.item(color: .blue, icon: .star),
.delay,
.item(color: .green, icon: .star)
])
],
equation: "a.compactMap( ★→▲ )",
output: .publisher { inputs in
inputs["a"]!.compactMap { $0?.mapOperation() }
}
),
OperationInfoExample(
inputs: [
Input(title: "a", items: [
.item(color: .red, icon: .star),
.nil,
.item(color: .blue, icon: .star),
.delay,
.item(color: .green, icon: .star)
])
],
equation: "a.map( ★→▲ )",
output: .publisher { inputs in
inputs["a"]!.map { $0?.mapOperation() }
}
)
]),
OperationInfo(
title: "Remove Duplicates",
examples: [
OperationInfoExample(
inputs: [
Input(title: "a", items: [
.item(color: .red, icon: .none),
.item(color: .red, icon: .none),
.item(color: .blue, icon: .none),
.item(color: .blue, icon: .star),
.delay,
.item(color: .green, icon: .none),
.item(color: .green, icon: .none)
])
], equation: "a.removeDuplicates()",
output: .publisher { inputs in
inputs["a"]!.removeDuplicates()
}
),
OperationInfoExample(
inputs: [
Input(title: "b", items: [
.item(color: .red, icon: .none),
.item(color: .red, icon: .none),
.item(color: .blue, icon: .none),
.item(color: .blue, icon: .star),
.delay,
.item(color: .green, icon: .none),
.item(color: .green, icon: .none)
])
], equation: "b.removeDuplicates(by: сolor )",
output: .publisher { inputs in
inputs["b"]!.removeDuplicates { a, b in a?.color == b?.color }
}
)
]),
OperationInfo(
title: "Replace Empty",
examples: [
OperationInfoExample(
inputs: [
Input(title: "b", items: [
])
], equation: "b.replaceEmpty(with: ...orange...)",
output: .publisher { inputs in
inputs["b"]!.replaceEmpty(with: .item(color: .orange, icon: .none))
}
),
OperationInfoExample(
inputs: [
Input(title: "a", items: [
.item(color: .red, icon: .none),
.item(color: .blue, icon: .none),
.delay,
.item(color: .green, icon: .none),
])
], equation: "a.replaceEmpty(with: ...orange...)",
output: .publisher { inputs in
inputs["a"]!.replaceEmpty(with: .item(color: .orange, icon: .none))
}
)
]),
OperationInfo(
title: "Replace Error",
examples: [
OperationInfoExample(
inputs: [
Input(title: "a", items: [
.item(color: .red, icon: .none),
.error(color: .green),
.item(color: .blue, icon: .none),
.delay,
.item(color: .green, icon: .none),
])
], equation: "a.replaceError(with: ...orange...)",
output: .publisher { inputs in
inputs["a"]!.replaceError(with: .item(color: .orange, icon: .star))
.setFailureType(to: DemoError.self)
}
),
])
])
}
#Preview {
CombineDemo(collections: [SwiftCombineDemo.filtering])
}