donguri9

import SwiftUI

var sw = UIScreen.main.bounds.width

struct ContentView: View {
    
    @State var drive:Bool = true
    
    var body: some View {
        ZStack{

donguri9

class StopWatchManeger:ObservableObject{
    
    enum stopWatchMode{
        case start
        case stop
        case pause
    }
    
    @Published var mode:stopWatchMode = .stop
    

donguri9

import SwiftUI

class StopWatchManeger:ObservableObject{
    @Published var secondsElapsed = 0.0
    var timer = Timer()
    
    func start(){
        timer = Timer.scheduledTimer(withTimeInterval: 0.1, repeats: true){ timer in
            self.secondsElapsed += 0.1
        }

donguri9

//
//  ContentView.swift
//  coredataTest
//
//  Created by ns on 2020/01/25.
//  Copyright © 2020 ns. All rights reserved.
//

import SwiftUI
import CoreData

donguri9

import SwiftUI

class CalcViewModel:ObservableObject{
    @Published var display = "0"
    @Published var middleTyping = false
    
    var displayValue:Double{
        get{
            return Double(display)!
        }

donguri9

import SwiftUI

struct ContentView: View {
    
    @State var display = "0"
    
    var body: some View {
        
        VStack(spacing:10){
            

donguri9

import SwiftUI

struct ContentView: View {
  
        @State var display = 0
        @State var currentValue = 0
        @State var useIsInTheMiddleOfTyping = false
        @State var first = 0
        @State var second = 0
        @State var operand = "+"

donguri9

import SwiftUI

struct ContentView: View {
  
      @State var inputText:String = ""
      @State var display:String = "0"
      @State var currentValue = ""
      @State var useIsInTheMiddleOfTyping = false
       @State var first = ""
    @State var operand = ""

donguri9

import Foundation

struct CalcBrain{
    
//    private var accumulator:Double?
//
//    private enum Operation{
//        case constant(Double)
////        case unryOperation((Double) -> Double)
//        case binaryOperation((Double,Double)->Double)

donguri9

struct CaluculatorBrain {
    private var accumulator:Double?
    
    mutating func performOperation(_ symbol:String){
        switch symbol {
        case "π":
            accumulator = Double.pi
        case "√":
            if let operand = accumulator{
            accumulator = sqrt(operand)