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# blacks0n's solution

## to Scrabble Score in the Ruby Track

Published at Mar 22 2020 · 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.

For installation and learning resources, refer to the Ruby resources page.

For running the tests provided, you will need the Minitest gem. Open a terminal window and run the following command to install minitest:

gem install minitest

If you would like color output, you can require 'minitest/pride' in the test file, or note the alternative instruction, below, for running the test file.

Run the tests from the exercise directory using the following command:

ruby scrabble_score_test.rb

To include color from the command line:

ruby -r minitest/pride scrabble_score_test.rb

## 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.

### scrabble_score_test.rb

require 'minitest/autorun'
require_relative 'scrabble_score'

class ScrabbleTest < Minitest::Test
def test_empty_word_scores_zero
assert_equal 0, Scrabble.new('').score
end

def test_whitespace_scores_zero
skip
assert_equal 0, Scrabble.new(" \t\n").score
end

def test_nil_scores_zero
skip
assert_equal 0, Scrabble.new(nil).score
end

def test_scores_very_short_word
skip
assert_equal 1, Scrabble.new('a').score
end

def test_scores_other_very_short_word
skip
assert_equal 4, Scrabble.new('f').score
end

def test_simple_word_scores_the_number_of_letters
skip
assert_equal 6, Scrabble.new('street').score
end

def test_complicated_word_scores_more
skip
assert_equal 22, Scrabble.new('quirky').score
end

def test_scores_are_case_insensitive
skip
assert_equal 41, Scrabble.new('OXYPHENBUTAZONE').score
end

def test_convenient_scoring
skip
assert_equal 13, Scrabble.score('alacrity')
end
end
=begin
Write your code for the 'Scrabble Score' exercise in this file. Make the tests in
`scrabble_score_test.rb` pass.

To get started with TDD, see the `README.md` file in your
`ruby/scrabble-score` directory.
=end

class Scrabble

POINTS = {
1 => ['A', 'E', 'I', 'O', 'U', 'L', 'N', 'R', 'S', 'T'],
2 => ['D', 'G'],
3 => ['B', 'C', 'M', 'P'],
4 => ['F', 'H', 'V', 'W', 'Y'],
5 => ['K'],
8 => ['J', 'X'],
10 => ['Q', 'Z']
}

def initialize(string)
@string = string
end

def score
Scrabble.score(@string)
end

def self.score(string)
sum = 0
string = (string || '').upcase

string.chars.each do |char|
Scrabble::POINTS.each do |index, value|
sum += (value.include?(char) ? index : 0)
end
end

sum
end

end