LL QUIZ

gistfile1.rb

require 'pry'
require 'test/unit'

class String
  def ll_quiz
    input = self.dup
    output = ''

    input.split("\n").each do |line|
      target, strings = line.split(' ')
      output += strings.split('').inject('') do |out, char|
        out += (char == target) ? '*' : ' '
      end
      output += "\n"
    end

    output
  end
end

class StringTest < Test::Unit::TestCase
  def test_ll_quiz
    input = <<'EOS'
1 919
2 992
3 399
EOS
    expect = <<'EOS'
 * 
  *
*  
EOS

    assert_equal(expect, input.ll_quiz)
  end
end

input = <<'EOS'
1 222222222222
2 145681298690
3 212124345678
1 234567189876
4 343333433334
7 472226769067
9 592226968069
5 652222566665
4 744444444444
3 876542124567
EOS

puts input.ll_quiz