Contacts MRC App

Sprint 11/Module 4/RPNCalculatorObjC/RPNCalculatorObjC/LMSCalculator.h

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+//
+//  LMSCalculator.h
+//  RPNCalculatorObjC
+//
+//  Created by Lisa Sampson on 2/28/19.
+//  Copyright © 2019 Lisa M Sampson. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface LMSCalculator : NSObject
+
+typedef NS_ENUM(NSInteger, LMSCalculatorOperator) {
+    LMSCalculatorOperatorAdd,
+    LMSCalculatorOperatorSubtract,
+    LMSCalculatorOperatorMultiply,
+    LMSCalculatorOperatorDivide
+};
+
+@property (readonly) double topValue;
+
+- (void)pushNumber:(double)value;
+- (void)applyCalculatorOperator:(LMSCalculatorOperator)calculatorOperator;
+- (void)clear;
+@end
+
+NS_ASSUME_NONNULL_END

Sprint 11/Module 4/RPNCalculatorObjC/RPNCalculatorObjC/LMSCalculator.m

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+//
+//  LMSCalculator.m
+//  RPNCalculatorObjC
+//
+//  Created by Lisa Sampson on 2/28/19.
+//  Copyright © 2019 Lisa M Sampson. All rights reserved.
+//
+
+#import "LMSCalculator.h"
+#import "LMSStack.h"
+
+@interface LMSCalculator ()
+
+@property LMSStack *stack;
+
+@end
+
+@implementation LMSCalculator
+
+- (instancetype)init
+{
+    self = [super init];
+    if (self != nil) {
+        _stack = [[LMSStack alloc] initWithArray:@[@0.0, @0.0]];
+    }
+    return self;
+}
+
+- (double)topValue {
+    return [[self.stack peek] doubleValue];
+}
+
+- (void)pushNumber:(double)value {
+    NSNumber *number = [NSNumber numberWithDouble:value];
+    [self.stack push:number];
+}
+- (void)applyCalculatorOperator:(LMSCalculatorOperator)calculatorOperator {
+
+    double operand2 = [[self.stack pop] doubleValue];
+    double operand1 = [[self.stack pop] doubleValue];
+
+    double result = 0.0;
+    switch (calculatorOperator) {
+        case LMSCalculatorOperatorAdd:
+            result = operand1 + operand2;
+            break;
+        case LMSCalculatorOperatorSubtract:
+            result = operand1 - operand2;
+            break;
+        case LMSCalculatorOperatorMultiply:
+            result = operand1 * operand2;
+            break;
+        case LMSCalculatorOperatorDivide:
+            result = operand1 / operand2;
+            break;
+    }
+    [self.stack push:[NSNumber numberWithDouble:result]];
+}
+- (void)clear {
+    self.stack = [[LMSStack alloc] initWithArray:@[@0.0, @0.0]];
+}
+
+@end

Sprint 11/Module 4/RPNCalculatorObjC/RPNCalculatorObjC/LMSDigitAccumulator.h

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+//
+//  LMSDigitAccumulator.h
+//  RPNCalculatorObjC
+//
+//  Created by Lisa Sampson on 2/28/19.
+//  Copyright © 2019 Lisa M Sampson. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface LMSDigitAccumulator : NSObject
+
+@property (readonly) double value;
+
+- (void)addDigitWithNumericValue: (NSInteger)number;
+- (void)addDecimalPoint;
+- (void)clear;
+
+@end
+
+NS_ASSUME_NONNULL_END

Sprint 11/Module 4/RPNCalculatorObjC/RPNCalculatorObjC/LMSDigitAccumulator.m

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+//
+//  LMSDigitAccumulator.m
+//  RPNCalculatorObjC
+//
+//  Created by Lisa Sampson on 2/28/19.
+//  Copyright © 2019 Lisa M Sampson. All rights reserved.
+//
+
+#import "LMSDigitAccumulator.h"
+
+@interface LMSDigitAccumulator ()
+
+@property NSMutableArray *digits;
+
+@end
+
+@implementation LMSDigitAccumulator
+
+- (instancetype)init {
+    self = [super init];
+    if (self != nil) {
+        _digits = [NSMutableArray arrayWithArray:@[]];
+    }
+    return self;
+}
+
+- (double)value {
+    NSString *numberAsString = [self.digits componentsJoinedByString:@""];
+    double number = numberAsString.doubleValue;
+    return number;
+}
+
+- (void)addDigitWithNumericValue: (NSInteger)number {
+    NSNumber *digit = [NSNumber numberWithInteger:number];
+    NSString *string = digit.stringValue;
+    [self.digits addObject:string];
+}
+
+- (void)addDecimalPoint {
+    [self.digits addObject:@"."];
+}
+
+- (void)clear {
+    [self.digits removeAllObjects];
+}
+
+@end

Sprint 11/Module 4/RPNCalculatorObjC/RPNCalculatorObjC/LMSStack.h

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+//
+//  LMSStack.h
+//  RPNCalculatorObjC
+//
+//  Created by Lisa Sampson on 2/28/19.
+//  Copyright © 2019 Lisa M Sampson. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface LMSStack : NSObject
+
+- (instancetype)initWithArray: (NSArray *)array;
+
+- (void)push: (NSNumber *)value;
+- (NSNumber *)pop;
+- (NSNumber *)peek;
+
+@end
+
+NS_ASSUME_NONNULL_END

Sprint 11/Module 4/RPNCalculatorObjC/RPNCalculatorObjC/LMSStack.m

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+//
+//  LMSStack.m
+//  RPNCalculatorObjC
+//
+//  Created by Lisa Sampson on 2/28/19.
+//  Copyright © 2019 Lisa M Sampson. All rights reserved.
+//
+
+#import "LMSStack.h"
+
+@interface LMSStack ()
+
+@property NSMutableArray *values;
+
+@end
+
+@implementation LMSStack
+
+- (instancetype)initWithArray:(NSArray *)array {
+    self = [super init];
+    if (self != nil) {
+        _values = array.mutableCopy;
+    }
+    return self;
+}
+
+- (void)push:(NSNumber *)value {
+    [self.values addObject:value];
+}
+
+- (NSNumber *)pop {
+    NSNumber *last = self.values.lastObject;
+    [self.values removeLastObject];
+    return last;
+}
+
+- (NSNumber *)peek {
+    return self.values.lastObject;
+}
+
+@end

Sprint 11/Module 4/RPNCalculatorObjC/RPNCalculatorObjC/Resources/AppDelegate.h

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+//
+//  AppDelegate.h
+//  RPNCalculatorObjC
+//
+//  Created by Lisa Sampson on 2/28/19.
+//  Copyright © 2019 Lisa M Sampson. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+@interface AppDelegate : UIResponder <UIApplicationDelegate>
+
+@property (strong, nonatomic) UIWindow *window;
+
+
+@end
+

Sprint 11/Module 4/RPNCalculatorObjC/RPNCalculatorObjC/Resources/AppDelegate.m

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+//
+//  AppDelegate.m
+//  RPNCalculatorObjC
+//
+//  Created by Lisa Sampson on 2/28/19.
+//  Copyright © 2019 Lisa M Sampson. All rights reserved.
+//
+
+#import "AppDelegate.h"
+
+@interface AppDelegate ()
+
+@end
+
+@implementation AppDelegate
+
+
+- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
+    // Override point for customization after application launch.
+    return YES;
+}
+
+
+- (void)applicationWillResignActive:(UIApplication *)application {
+    // Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
+    // Use this method to pause ongoing tasks, disable timers, and invalidate graphics rendering callbacks. Games should use this method to pause the game.
+}
+
+
+- (void)applicationDidEnterBackground:(UIApplication *)application {
+    // Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
+    // If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
+}
+
+
+- (void)applicationWillEnterForeground:(UIApplication *)application {
+    // Called as part of the transition from the background to the active state; here you can undo many of the changes made on entering the background.
+}
+
+
+- (void)applicationDidBecomeActive:(UIApplication *)application {
+    // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
+}
+
+
+- (void)applicationWillTerminate:(UIApplication *)application {
+    // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
+}
+
+
+@end