Remove koans directory from source control.

[ruby_koans.git] / koans / about_sandwich_code.rb

diff --git a/koans/about_sandwich_code.rb b/koans/about_sandwich_code.rb
deleted file mode 100644 (file)
index 614a374..0000000
--- a/koans/about_sandwich_code.rb
+++ /dev/null
@@ -1,106 +0,0 @@
-require File.expand_path(File.dirname(__FILE__) + '/edgecase')
-
-class AboutSandwichCode < EdgeCase::Koan
-
-  def count_lines(file_name)
-    file = open(file_name)
-    count = 0
-    while line = file.gets
-      count += 1
-    end
-    count
-  ensure
-    file.close if file
-  end
-
-  def test_counting_lines
-    assert_equal __, count_lines("example_file.txt")
-  end
-
-  # ------------------------------------------------------------------
-
-  def find_line(file_name)
-    file = open(file_name)
-    while line = file.gets
-      return line if line.match(/e/)
-    end
-  ensure
-    file.close if file
-  end
-
-  def test_finding_lines
-    assert_equal __, find_line("example_file.txt")
-  end
-
-  # ------------------------------------------------------------------
-  # THINK ABOUT IT:
-  #
-  # The count_lines and find_line are similar, and yet different.
-  # They both follow the pattern of "sandwich code".
-  #
-  # Sandwich code is code that comes in three parts: (1) the top slice
-  # of bread, (2) the meat, and (3) the bottom slice of bread.  The
-  # the bread part of the sandwich almost always goes together, but
-  # the meat part changes all the time.
-  #
-  # Because the changing part of the sandwich code is in the middle,
-  # abstracting the top and bottom bread slices to a library can be
-  # difficult in many languages.
-  #
-  # (Aside for C++ programmers: The idiom of capturing allocated
-  # pointers in a smart pointer constructor is an attempt to deal with
-  # the problem of sandwich code for resource allocation.)
-  #
-  # Consider the following code:
-  #
-
-  def file_sandwich(file_name)
-    file = open(file_name)
-    yield(file)
-  ensure
-    file.close if file
-  end
-
-  # Now we write:
-
-  def count_lines2(file_name)
-    file_sandwich(file_name) do |file|
-      count = 0
-      while line = file.gets
-        count += 1
-      end
-      count
-    end
-  end
-
-  def test_counting_lines2
-    assert_equal __, count_lines2("example_file.txt")
-  end
-
-  # ------------------------------------------------------------------
-
-  def find_line2(file_name)
-    # Rewrite find_line using the file_sandwich library function.
-  end
-
-  def test_finding_lines2
-    assert_equal __, find_line2("example_file.txt")
-  end
-
-  # ------------------------------------------------------------------
-
-  def count_lines3(file_name)
-    open(file_name) do |file|
-      count = 0
-      while line = file.gets
-        count += 1
-      end
-      count
-    end
-  end
-
-  def test_open_handles_the_file_sandwich_when_given_a_block
-    assert_equal __, count_lines3("example_file.txt")
-  end
-
-end