ktanaka117

func f(_ arg: inout String) {
    arg = "🐥"
    arg = "🐓"
}

var egg: String = "🥚" {
    didSet { print(oldValue) }
}

f(&egg)

ktanaka117

lelt _: (Int) -> Int = { $0 + 1 }

ktanaka117

class SomeClass {
    var v: Int!
}

ktanaka117

import RxSwift
import RxCocoa

extension Reactive where Base: UITextField {
    var nonOptionalText: Observable<String> {
        return base.rx.text.asObservable().map { text -> String in
            if let _ = text {
                return text!
            }
            

ktanaka117

#!/bin/bash

set -eu

function lack_of_necessary_param() {
  echo "-pオプションは必須オプションです。-pオプションを必ず使用して、ファイルパスを指定してください。"
  exit 1
}

IS_THERE_NECESSARY_OPT=false

ktanaka117

'use strict'

const sleep = someFunction => {
    return new Promise(resolve => {
        setTimeout(() => {
            resolve(someFunction())        
        }, 5000)
    })
}

ktanaka117

'use strict'

const sleep = someFunction => {
    return new Promise(resolve => {
        setTimeout(() => {
            resolve(someFunction())        
        }, 5000)
    })
}

ktanaka117

import UIKit

public struct Maker<Product> {
    let product: Product
}

extension Maker where Product: UILabel {
    public func set(textColor color: UIColor) -> Maker {
        self.product.textColor = color
        return self

ktanaka117

import UIKit

public struct UILabelMaker {
    let label: UILabel
}

extension UILabelMaker {
    public func set(textColor color: UIColor) -> UILabelMaker {
        self.label.textColor = color
        return self

ktanaka117

'use strict'

const sleep = (someFunction) => {
    setTimeout(someFunction, 5000)
}

// Promise
const promiseFunction = (() => {
    return new Promise((resolve, reject) => {
        sleep(() => {