Add transpose

config.json

@@ -85,7 +85,8 @@
     "list-ops",
     "diamond",
     "all-your-base",
-    "isogram"
+    "isogram",
+    "transpose"
   ],
   "exercises": [
     {
@@ -573,6 +574,12 @@
       "difficulty": 1,
       "topics": [
       ]
+    },
+    {
+      "slug": "transpose",
+      "difficulty": 1,
+      "topics": [
+      ]
     }
   ],
   "deprecated": [

exercises/transpose/.version

@@ -0,0 +1 @@
+1

exercises/transpose/example.rb

@@ -0,0 +1,14 @@
+module BookKeeping
+  VERSION = 1
+end
+
+class Transpose
+  def self.transpose(input)
+    lines = input.split("\n")
+    max_line_length = lines.map(&:length).max
+
+    lines
+      .map { |line| line.ljust(max_line_length).chars }
+      .transpose.map(&:join).join("\n").strip
+  end
+end

exercises/transpose/example.tt

@@ -0,0 +1,22 @@
+#!/usr/bin/env ruby
+gem 'minitest', '>= 5.0.0'
+require 'minitest/autorun'
+require_relative 'transpose'
+
+# Test data version:
+# <%= sha1 %>
+class TransposeTest < Minitest::Test<% test_cases.each do |test_case| %>
+  def <%= test_case.test_name %>
+    <%= test_case.skipped %>
+    input = <%= test_case.input_text %>
+    actual = <%= test_case.workload %>
+    expected = <%= test_case.expect %>
+    assert_equal expected.strip, actual
+  end
+<% end %>
+<%= IO.read(XRUBY_LIB + '/bookkeeping.md') %>
+  def test_bookkeeping
+    skip
+    assert_equal <%= version.next %>, BookKeeping::VERSION
+  end
+end

exercises/transpose/transpose_test.rb

@@ -0,0 +1,303 @@
+#!/usr/bin/env ruby
+gem 'minitest', '>= 5.0.0'
+require 'minitest/autorun'
+require_relative 'transpose'
+
+# Test data version:
+# 0a51cfc
+class TransposeTest < Minitest::Test
+  def test_empty_string
+    # skip
+    input = <<-INPUT.gsub(/^ {6}/, '')
+
+    INPUT
+    actual = Transpose.transpose(input)
+    expected = <<-EXPECTED.gsub(/^ {6}/, '')
+
+    EXPECTED
+    assert_equal expected.strip, actual
+  end
+
+  def test_two_characters_in_a_row
+    skip
+    input = <<-INPUT.gsub(/^ {6}/, '')
+      A1
+    INPUT
+    actual = Transpose.transpose(input)
+    expected = <<-EXPECTED.gsub(/^ {6}/, '')
+      A
+      1
+    EXPECTED
+    assert_equal expected.strip, actual
+  end
+
+  def test_two_characters_in_a_column
+    skip
+    input = <<-INPUT.gsub(/^ {6}/, '')
+      A
+      1
+    INPUT
+    actual = Transpose.transpose(input)
+    expected = <<-EXPECTED.gsub(/^ {6}/, '')
+      A1
+    EXPECTED
+    assert_equal expected.strip, actual
+  end
+
+  def test_simple
+    skip
+    input = <<-INPUT.gsub(/^ {6}/, '')
+      ABC
+      123
+    INPUT
+    actual = Transpose.transpose(input)
+    expected = <<-EXPECTED.gsub(/^ {6}/, '')
+      A1
+      B2
+      C3
+    EXPECTED
+    assert_equal expected.strip, actual
+  end
+
+  def test_single_line
+    skip
+    input = <<-INPUT.gsub(/^ {6}/, '')
+      Single line.
+    INPUT
+    actual = Transpose.transpose(input)
+    expected = <<-EXPECTED.gsub(/^ {6}/, '')
+      S
+      i
+      n
+      g
+      l
+      e
+
+      l
+      i
+      n
+      e
+      .
+    EXPECTED
+    assert_equal expected.strip, actual
+  end
+
+  def test_first_line_longer_than_second_line
+    skip
+    input = <<-INPUT.gsub(/^ {6}/, '')
+      The fourth line.
+      The fifth line.
+    INPUT
+    actual = Transpose.transpose(input)
+    expected = <<-EXPECTED.gsub(/^ {6}/, '')
+      TT
+      hh
+      ee
+
+      ff
+      oi
+      uf
+      rt
+      th
+      h 
+       l
+      li
+      in
+      ne
+      e.
+      .
+    EXPECTED
+    assert_equal expected.strip, actual
+  end
+
+  def test_second_line_longer_than_first_line
+    skip
+    input = <<-INPUT.gsub(/^ {6}/, '')
+      The first line.
+      The second line.
+    INPUT
+    actual = Transpose.transpose(input)
+    expected = <<-EXPECTED.gsub(/^ {6}/, '')
+      TT
+      hh
+      ee
+
+      fs
+      ie
+      rc
+      so
+      tn
+       d
+      l 
+      il
+      ni
+      en
+      .e
+       .
+    EXPECTED
+    assert_equal expected.strip, actual
+  end
+
+  def test_square
+    skip
+    input = <<-INPUT.gsub(/^ {6}/, '')
+      HEART
+      EMBER
+      ABUSE
+      RESIN
+      TREND
+    INPUT
+    actual = Transpose.transpose(input)
+    expected = <<-EXPECTED.gsub(/^ {6}/, '')
+      HEART
+      EMBER
+      ABUSE
+      RESIN
+      TREND
+    EXPECTED
+    assert_equal expected.strip, actual
+  end
+
+  def test_rectangle
+    skip
+    input = <<-INPUT.gsub(/^ {6}/, '')
+      FRACTURE
+      OUTLINED
+      BLOOMING
+      SEPTETTE
+    INPUT
+    actual = Transpose.transpose(input)
+    expected = <<-EXPECTED.gsub(/^ {6}/, '')
+      FOBS
+      RULE
+      ATOP
+      CLOT
+      TIME
+      UNIT
+      RENT
+      EDGE
+    EXPECTED
+    assert_equal expected.strip, actual
+  end
+
+  def test_triangle
+    skip
+    input = <<-INPUT.gsub(/^ {6}/, '')
+      T
+      EE
+      AAA
+      SSSS
+      EEEEE
+      RRRRRR
+    INPUT
+    actual = Transpose.transpose(input)
+    expected = <<-EXPECTED.gsub(/^ {6}/, '')
+      TEASER
+       EASER
+        ASER
+         SER
+          ER
+           R
+    EXPECTED
+    assert_equal expected.strip, actual
+  end
+
+  def test_many_lines
+    skip
+    input = <<-INPUT.gsub(/^ {6}/, '')
+      Chor. Two households, both alike in dignity,
+      In fair Verona, where we lay our scene,
+      From ancient grudge break to new mutiny,
+      Where civil blood makes civil hands unclean.
+      From forth the fatal loins of these two foes
+      A pair of star-cross'd lovers take their life;
+      Whose misadventur'd piteous overthrows
+      Doth with their death bury their parents' strife.
+      The fearful passage of their death-mark'd love,
+      And the continuance of their parents' rage,
+      Which, but their children's end, naught could remove,
+      Is now the two hours' traffic of our stage;
+      The which if you with patient ears attend,
+      What here shall miss, our toil shall strive to mend.
+    INPUT
+    actual = Transpose.transpose(input)
+    expected = <<-EXPECTED.gsub(/^ {6}/, '')
+      CIFWFAWDTAWITW
+      hnrhr hohnhshh
+      o oeopotedi ea
+      rfmrmash  cn t
+      .a e ie fthow 
+       ia fr weh,whh
+      Trnco miae  ie
+      w ciroitr btcr
+      oVivtfshfcuhhe
+       eeih a uote  
+      hrnl sdtln  is
+      oot ttvh tttfh
+      un bhaeepihw a
+      saglernianeoyl
+      e,ro -trsui ol
+      h uofcu sarhu 
+      owddarrdan o m
+      lhg to'egccuwi
+      deemasdaeehris
+      sr als t  ists
+      ,ebk 'phool'h,
+        reldi ffd   
+      bweso tb  rtpo
+      oea ileutterau
+      t kcnoorhhnatr
+      hl isvuyee'fi 
+       atv es iisfet
+      ayoior trr ino
+      l  lfsoh  ecti
+      ion   vedpn  l
+      kuehtteieadoe 
+      erwaharrar,fas
+         nekt te  rh
+      ismdsehphnnosa
+      ncuse ra-tau l
+       et  tormsural
+      dniuthwea'g t 
+      iennwesnr hsts
+      g,ycoi tkrttet
+      n ,l r s'a anr
+      i  ef  'dgcgdi
+      t  aol   eoe,v
+      y  nei sl,u; e
+      ,  .sf to l   
+           e rv d  t
+           ; ie    o
+             f, r   
+             e  e  m
+             .  m  e
+                o  n
+                v  d
+                e  .
+                ,
+    EXPECTED
+    assert_equal expected.strip, actual
+  end
+
+  # Problems in exercism evolve over time, as we find better ways to ask
+  # questions.
+  # The version number refers to the version of the problem you solved,
+  # not your solution.
+  #
+  # Define a constant named VERSION inside of the top level BookKeeping
+  # module, which may be placed near the end of your file.
+  #
+  # In your file, it will look like this:
+  #
+  # module BookKeeping
+  #   VERSION = 1 # Where the version number matches the one in the test.
+  # end
+  #
+  # If you are curious, read more about constants on RubyDoc:
+  # http://ruby-doc.org/docs/ruby-doc-bundle/UsersGuide/rg/constants.html
+
+  def test_bookkeeping
+    skip
+    assert_equal 1, BookKeeping::VERSION
+  end
+end