ruby - word-count

ruby/word-count/README.md

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+# Word Count
+
+Given a phrase, count the occurrences of each word in that phrase.
+
+For example for the input `"olly olly in come free"`
+
+```text
+olly: 2
+in: 1
+come: 1
+free: 1
+```
+
+* * * *
+
+For installation and learning resources, refer to the
+[exercism help page](http://exercism.io/languages/ruby).
+
+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 word_count_test.rb
+
+To include color from the command line:
+
+    ruby -r minitest/pride word_count_test.rb
+
+
+## Source
+
+This is a classic toy problem, but we were reminded of it by seeing it in the Go Tour.
+
+## Submitting Incomplete Solutions
+It's possible to submit an incomplete solution so you can see how others have completed the exercise.

ruby/word-count/word_count.rb

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+class Phrase
+  def initialize(phrase)
+    @phrase = phrase
+  end
+
+  def word_count
+    counts = {}
+    @phrase.scan(/\w+(?:'\w)*/).each do |word|
+      word.downcase!
+      counts[word] = counts[word].to_i + 1
+    end
+    counts
+  end
+end

ruby/word-count/word_count_test.rb

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+require 'minitest/autorun'
+require_relative 'word_count'
+
+# Common test data version: 1.2.0 77623ec
+class WordCountTest < Minitest::Test
+  def test_count_one_word
+    # skip
+    phrase = Phrase.new("word")
+    counts = {"word"=>1}
+    assert_equal counts, phrase.word_count
+  end
+
+  def test_count_one_of_each_word
+    # skip
+    phrase = Phrase.new("one of each")
+    counts = {"one"=>1, "of"=>1, "each"=>1}
+    assert_equal counts, phrase.word_count
+  end
+
+  def test_multiple_occurrences_of_a_word
+    # skip
+    phrase = Phrase.new("one fish two fish red fish blue fish")
+    counts = {"one"=>1, "fish"=>4, "two"=>1, "red"=>1, "blue"=>1}
+    assert_equal counts, phrase.word_count
+  end
+
+  def test_handles_cramped_lists
+    # skip
+    phrase = Phrase.new("one,two,three")
+    counts = {"one"=>1, "two"=>1, "three"=>1}
+    assert_equal counts, phrase.word_count
+  end
+
+  def test_handles_expanded_lists
+    # skip
+    phrase = Phrase.new("one,\ntwo,\nthree")
+    counts = {"one"=>1, "two"=>1, "three"=>1}
+    assert_equal counts, phrase.word_count
+  end
+
+  def test_ignore_punctuation
+    # skip
+    phrase = Phrase.new("car: carpet as java: javascript!!&@$%^&")
+    counts = {"car"=>1, "carpet"=>1, "as"=>1, "java"=>1, "javascript"=>1}
+    assert_equal counts, phrase.word_count
+  end
+
+  def test_include_numbers
+    # skip
+    phrase = Phrase.new("testing, 1, 2 testing")
+    counts = {"testing"=>2, "1"=>1, "2"=>1}
+    assert_equal counts, phrase.word_count
+  end
+
+  def test_normalize_case
+    #skip
+    phrase = Phrase.new("go Go GO Stop stop")
+    counts = {"go"=>3, "stop"=>2}
+    assert_equal counts, phrase.word_count
+  end
+
+  def test_with_apostrophes
+    # skip
+    phrase = Phrase.new("First: don't laugh. Then: don't cry.")
+    counts = {"first"=>1, "don't"=>2, "laugh"=>1, "then"=>1, "cry"=>1}
+    assert_equal counts, phrase.word_count
+  end
+
+  def test_with_quotations
+    # skip
+    phrase = Phrase.new("Joe can't tell between 'large' and large.")
+    counts = {"joe"=>1, "can't"=>1, "tell"=>1, "between"=>1, "large"=>2, "and"=>1}
+    assert_equal counts, phrase.word_count
+  end
+
+  def test_multiple_spaces_not_detected_as_a_word
+    # skip
+    phrase = Phrase.new(" multiple   whitespaces")
+    counts = {"multiple"=>1, "whitespaces"=>1}
+    assert_equal counts, phrase.word_count
+  end
+end