acronymizer enhanced

acronimizer.rb

def acronimize(sentence)
  return "" unless sentence.is_a? String

  trash = %w(de des)

  # split sentence into array
  words = sentence.split(" ")

  words.select! do |word|
    !trash.include?(word)
  end

  # for each item in my array, push 1st letter into result
  first_letters = words.map do |word|
    if block_given?
      to_transform = yield(word)
      if to_transform
        word.upcase
      else
        word[0].upcase
      end
    else
      word[0].upcase
    end
  end
  # upcase the stuff
  return first_letters.join
end


# p acronimize("") == ""
# p acronimize(" ") == ""
# p acronimize(12) == ""
# p acronimize(12.948483) == ""

acronimizer_spec.rb

require_relative "../acronimizer.rb"

# This file MUST be placed in spec/ folder !!

describe "#acronymize" do
  it "works for Save Our Soul" do
    actual = acronimize("save our soul")
    expected = "SOS"
    expect(actual).to eq(expected) # passes if `actual == expected`
  end
  it "works for Olympique de Marseille" do
    actual = acronimize("Olympique de Marseille")
    expected = "OM"
    expect(actual).to eq(expected) # passes if `actual == expected`
  end
  it "works for Société nationale des Chemins de fer" do
    actual = acronimize("Société nationale des Chemins de fer")
    expected = "SNCF"
    expect(actual).to eq(expected) # passes if `actual == expected`
  end
  it "works for Swatch Mercedes Art" do
    actual = acronimize("Swatch Mercedes Art"){ |word| word == "Art" }
    expected = "SMART"
    expect(actual).to eq(expected) # passes if `actual == expected`
  end
end