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jaishreedhage's solution

to Scrabble Score in the Objective-C Track

Published at Jul 13 2018 · 0 comments
Instructions
Test suite
Solution

Given a word, compute the scrabble score for that word.

Letter Values

You'll need these:

Letter                           Value
A, E, I, O, U, L, N, R, S, T       1
D, G                               2
B, C, M, P                         3
F, H, V, W, Y                      4
K                                  5
J, X                               8
Q, Z                               10

Examples

"cabbage" should be scored as worth 14 points:

  • 3 points for C
  • 1 point for A, twice
  • 3 points for B, twice
  • 2 points for G
  • 1 point for E

And to total:

  • 3 + 2*1 + 2*3 + 2 + 1
  • = 3 + 2 + 6 + 3
  • = 5 + 9
  • = 14

Extensions

  • You can play a double or a triple letter.
  • You can play a double or a triple word.

Setup

There are two different methods of getting set up to run the tests with Objective-C:

  • Create an Xcode project with a test target which will run the tests.
  • Use the ruby gem objc as a test runner utility.

Both are described in more detail here: http://exercism.io/languages/objective-c

Submitting Exercises

When submitting an exercise, make sure your solution file is in the same directory as the test code.

The submit command will look something like:

exercism submit <path-to-exercism-workspace>/objective-c/scrabble-score/ScrabbleScore.m

You can find the Exercism workspace by running exercism debug and looking for the line beginning with Workspace.

Source

Inspired by the Extreme Startup game https://github.com/rchatley/extreme_startup

Submitting Incomplete Solutions

It's possible to submit an incomplete solution so you can see how others have completed the exercise.

ScrabbleScoreTest.m

#import <XCTest/XCTest.h>

#if __has_include("ScrabbleScoreExample.h")
# import "ScrabbleScoreExample.h"
# else
# import "ScrabbleScore.h"
#endif

@interface ScrabbleScoreTest : XCTestCase

@end

@implementation ScrabbleScoreTest

- (void)testEmptyWordScoresZero {
    XCTAssertEqual(0, [[[ScrabbleScore alloc] initWithWord:@""] score]);
}

- (void)testWhitespaceScoresZero {
    XCTAssertEqual(0, [[[ScrabbleScore alloc] initWithWord:@" \t\n"] score]);
}

- (void)testNilScoresZero {
    XCTAssertEqual(0, [[[ScrabbleScore alloc] initWithWord:nil] score]);
}

- (void)testScoresVeryShortWord {
    XCTAssertEqual(1, [[[ScrabbleScore alloc] initWithWord:@"a"] score]);
}

- (void)testScoresOtherVeryShortWord {
    XCTAssertEqual(4, [[[ScrabbleScore alloc] initWithWord:@"f"] score]);
}

- (void)testSimpleWordScoresTheNumberOfLetters {
    XCTAssertEqual(6, [[[ScrabbleScore alloc] initWithWord:@"street"] score]);
}

- (void)testComplicatedWordScoresMore {
    XCTAssertEqual(22, [[[ScrabbleScore alloc] initWithWord:@"quirky"] score]);
}

- (void)testScoresAreCaseInsensitive {
    XCTAssertEqual(41, [[[ScrabbleScore alloc] initWithWord:@"OXYPHENBUTAZONE"] score]);
}

- (void)testConvenientScoring {
    XCTAssertEqual(13, [ScrabbleScore score:@"alacrity"]);
}

@end

ScrabbleScore/ScrabbleScoreTest/ScrabbleScore.h

//
//  ScrabbleScore.h
//  ScrabbleScore
//
//  Created by Jaishree Dhage on 09/12/17.
//  Copyright © 2017 Jaishree Dhage. All rights reserved.
//

#import <Foundation/Foundation.h>

@interface ScrabbleScore : NSObject

@property (nonatomic,strong,readonly) NSString *word;

-(NSUInteger) score;
+(NSUInteger) score : (NSString *)word;
-(instancetype) initWithWord:(NSString *) word;

@end

ScrabbleScore/ScrabbleScoreTest/ScrabbleScore.m

//
//  ScrabbleScore.m
//  ScrabbleScore
//
//  Created by Jaishree Dhage on 09/12/17.
//  Copyright © 2017 Jaishree Dhage. All rights reserved.
//

#import "ScrabbleScore.h"

@interface ScrabbleScore ()

@property (nonatomic,strong,readwrite) NSString *word;

@end

@implementation ScrabbleScore

-(instancetype)initWithWord:(NSString *)word{
    self = [super init];
    if(self){
        _word = [word uppercaseString];
    }
    return self;
}

+(NSUInteger)score:(NSString *)word{
    ScrabbleScore *scrabbleScore = [[ScrabbleScore alloc]init];
    scrabbleScore.word = [word uppercaseString];
    return [scrabbleScore score];
}

-(NSUInteger)score{
    if(self.word==nil || self.word.length==0)
        return 0;
    NSUInteger score = 0;
    for(int i=0;i<self.word.length;i++){
        unichar c = [self.word characterAtIndex:i];
        if(c=='A' || c=='E' || c=='I' || c=='O' || c=='U' || c=='L' || c=='N' || c=='R' || c=='S' ||c=='T')
            score += 1;
        else if(c=='D' || c=='G')
            score += 2;
        else if(c=='B' || c=='C' || c=='M' || c=='P')
            score += 3;
        else if(c=='F' || c=='H' || c=='V' || c=='W' || c=='Y')
            score += 4;
        else if(c=='K')
            score += 5;
        else if(c=='J' || c=='X')
            score += 8;
        else if(c=='Q' || c=='Z')
            score += 10;
        else
            score += 0;
    }
    return score;
}

@end

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