1 files changed, 0 insertions, 51 deletions
diff --git a/unit/01/matched_string.rb b/unit/01/matched_string.rb
deleted file mode 100644
index 2836d16..0000000
--- a/unit/01/matched_string.rb
+++ /dev/null
@@ -1,51 +0,0 @@
-require 'bundler/inline'
-
-gemfile do
-  source 'https://rubygems.org'
-
-  gem 'minitest'
-end
-
-require 'minitest/autorun'
-
-=begin
-A matched string is a sequence of {, }, (, ), [, and ] characters that are properly matched.
-For example, “{{()[]}}” is a matched string, but this “{{()]}” is not, since the second { is matched with a ].
-Show how to use a stack so that, given a string of length n, you can determine if it is a matched string in O(n) time.
-=end
-
-class Example < Minitest::Test
-  def matches?(open, close)
-    case open
-    when '('
-      return close == ')'
-    when '{'
-      return close == '}'
-    when '['
-      return close == ']'
-    else
-      raise [open, close].inspect
-    end
-  end
-
-  def matched_string?(string)
-    stack = []
-    string.chars.each do |char|
-      case char
-      when '{', '[', '('
-        stack.push(char)
-      else
-        return unless matches?(stack.pop, char)
-      end
-    end
-    stack.size.zero?
-  end
-
-  def test_valid
-    assert matched_string?("{{()[]}}")
-  end
-
-  def test_invalid
-    refute matched_string?("{{()]}")
-  end
-end