kwmt

data class Person(val age:Int, val name:String) {
    
	val greet 
    	get() = "年齢は${age}です"
    
    fun testPrint() {
        println("testPrint ${age}" )
    }
}

kwmt

var isContinue:Boolean = true

val list  = arrayOf("hello", "good", "text", "hello2", "text2")
val result =   list.asSequence().takeWhile{isContinue}.reduce {s1, s2->
    if(s1.length == 4 && s2.length == 4) {
        isContinue = false
        return@reduce s1+s2
    }
    s2
}

kwmt

 val amari = 8.rem(3)
 println(amari)
 // Output
 // 2

kwmt

val num =  'a'.toValue()
println(num)
// Output
// 42

private fun Char.toValue() : Int{
    // 仕様: https://www.icao.int/publications/Documents/9303_p3_cons_en.pdf の 20ページの最後から21ページの最初

    val num = this.toInt() - '0'.toInt()
    if(num < 10) {

kwmt

File().outputStream().use { out ->
    bitmap.compress(Bitmap.CompressFormat.JPEG, 85, out)
    out.flush()
}

kwmt

val appBarConfiguration = AppBarConfiguration(setOf(R.id.titleScreen, R.id.aboutScreen))
setupActionBarWithNavController(navController, appBarConfiguration)

kwmt

import UIKit
import GoogleMaps

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
        // https://developers.google.com/maps/documentation/ios-sdk/get-api-key#add_key
        GMSServices.provideAPIKey("YOUR_API_KEY")
       return true
    }

kwmt

data class User(val name : String, val latLng: LatLng)

data class LatLng(val lat: Int, val lng: Int)

fun deleteDuplicates() {
   // create data
    val results = (1..10).map {User("$it", LatLng(it % 4, it%4))}
    results.forEach {
	    println(it)    
    }

kwmt

enum FromNagative: Int {
    case a = -1
    case b
    case c
}


print(FromNagative.a.rawValue) // -1
print(FromNagative.b.rawValue) // 0
print(FromNagative.c.rawValue) // 1

kwmt

import Foundation
import PlaygroundSupport

PlaygroundPage.current.needsIndefiniteExecution = true

let url = URL(string: "https://jsonplaceholder.typicode.com/posts/1")!
func fetch(callback:( (String)  -> Void)? = nil) {
    let task = URLSession.shared.dataTask(with: url) { (data, response, error) in
        guard error == nil else {
            callback?(error?.localizedDescription ?? "エラーです")