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@discardableResult
func some() -> Bool {
    // do something
    if error {
        return false
    }
    return true
}

// _ = some()

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Group {
    // view logic
}
.onAppear {
    // do something
}

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keyDecodingStrategy = .convertFromSnakeCase

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// iPhone 12 Proのアスペクト比
<img src="url" height="844" width="390">

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protocol HeaderViewDelegate: AnyObject {
    var HeaderPresenter: HeaderPresenter { get }
    func showAlert(of _: Error)
}

extension HeaderViewDelegate where Self: UIViewController {}

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// https://zenn.dev/yumiyoshi/scraps/363a710df362b8
git branch | xargs git branch -d

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// from:
// https://developer.apple.com/documentation/combine/just/erasetoanypublisher()

import Combine

public class TypeWithSubject {
    public let publisher: some Publisher = PassthroughSubject<Int,Never>()
}
public class TypeWithErasedSubject {
    public let publisher: some Publisher = PassthroughSubject<Int,Never>()

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class Res {
    let temp = "temp"
}

let reses = [Res(), Res(), Res()]
print(reses.map(\.temp)) // ["temp", "temp", "temp"]

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ディレクトリ構造

root
|
+-- tips.md
+-- tips2.md
+-- img --- image.png

ファイル

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import UIKit

/// ラッパークラス
final class CAButtonWrapper {
    private var button: UIButton!
    private var bar: UIView!
    private let completion: () -> Void

    init(completion: @escaping () -> Void) {
        self.completion = completion