From 2e42b509fb903a92c5996b7e93b9ea5fbc9a5f5f Mon Sep 17 00:00:00 2001
From: cheezenaan <cheezenaan@gmail.com>
Date: Wed, 6 Dec 2017 20:27:59 +0900
Subject: [PATCH 1/4] Refactor test

---
 test/transport_test.rb | 36 +++++++++++++++++++++++++++++-------
 1 file changed, 29 insertions(+), 7 deletions(-)

diff --git a/test/transport_test.rb b/test/transport_test.rb
index 64126c8..896e2cd 100644
--- a/test/transport_test.rb
+++ b/test/transport_test.rb
@@ -3,12 +3,34 @@
 
 class TransportTest < MiniTest::Test
   def test_transport
-    input = "1 2 3\n4 5 6\n7 8 9"
-    output = "1 4 7\n2 5 8\n3 6 9"
-    assert_equal output, transport(input)
+    input = <<~EOS
+      1 2 3
+      4 5 6
+      7 8 9
+    EOS
 
-    input = "1 2 3\n4 5 6\n7 8 9\n10 11 12"
-    output = "1 4 7 10\n2 5 8 11\n3 6 9 12"
-    assert_equal output, transport(input)
+    output = <<~EOS
+      1 4 7
+      2 5 8
+      3 6 9
+    EOS
+
+    # <~~ 記法だと末尾に改行文字(\n)が入るため #String#chomp で取り除く
+    assert_equal output.chomp, transport(input)
+
+    input = <<~EOS
+      1 2 3
+      4 5 6
+      7 8 9
+      10 11 12
+    EOS
+
+    output = <<~EOS
+      1 4 7 10
+      2 5 8 11
+      3 6 9 12
+    EOS
+
+    assert_equal output.chomp, transport(input)
   end
-end
\ No newline at end of file
+end

From 4e5f9a9712c19aa4dc40040fddb97b140edf315a Mon Sep 17 00:00:00 2001
From: cheezenaan <cheezenaan@gmail.com>
Date: Wed, 6 Dec 2017 20:32:56 +0900
Subject: [PATCH 2/4] Use Array#transpose

---
 lib/transport.rb       | 15 ++++-----------
 test/transport_test.rb |  8 ++++----
 2 files changed, 8 insertions(+), 15 deletions(-)

diff --git a/lib/transport.rb b/lib/transport.rb
index d930638..fd81af7 100644
--- a/lib/transport.rb
+++ b/lib/transport.rb
@@ -1,11 +1,4 @@
-def transport(source)
-  array = source.split("\n").map {|s| s.split(" ")}
-  rows_count = array.first.count
-
-  transported_array = []
-  0.upto(rows_count - 1) do |i|
-    transported_array << array.map {|a| a[i]}
-  end
-
-  transported_array.map {|s| s.join(" ")}.join("\n")
-end
\ No newline at end of file
+def transpose(source)
+  array = source.split("\n").map { |nums| nums.split(" ") }
+  array.transpose.map { |nums| nums.join(" ") }.join("\n")
+end
diff --git a/test/transport_test.rb b/test/transport_test.rb
index 896e2cd..b3c01bc 100644
--- a/test/transport_test.rb
+++ b/test/transport_test.rb
@@ -1,8 +1,8 @@
 require 'minitest/autorun'
 require './lib/transport'
 
-class TransportTest < MiniTest::Test
-  def test_transport
+class Transpose < MiniTest::Test
+  def test_transpose
     input = <<~EOS
       1 2 3
       4 5 6
@@ -16,7 +16,7 @@ def test_transport
     EOS
 
     # <~~ 記法だと末尾に改行文字(\n)が入るため #String#chomp で取り除く
-    assert_equal output.chomp, transport(input)
+    assert_equal output.chomp, transpose(input)
 
     input = <<~EOS
       1 2 3
@@ -31,6 +31,6 @@ def test_transport
       3 6 9 12
     EOS
 
-    assert_equal output.chomp, transport(input)
+    assert_equal output.chomp, transpose(input)
   end
 end

From aaa9e306c8db483ee00a378a40fb6ae0dd815722 Mon Sep 17 00:00:00 2001
From: cheezenaan <cheezenaan@gmail.com>
Date: Wed, 6 Dec 2017 20:42:32 +0900
Subject: [PATCH 3/4] Refactor `transpose`

- Rename variables
- Use `&` operator
---
 lib/transport.rb | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/lib/transport.rb b/lib/transport.rb
index fd81af7..f3a59b4 100644
--- a/lib/transport.rb
+++ b/lib/transport.rb
@@ -1,4 +1,5 @@
 def transpose(source)
-  array = source.split("\n").map { |nums| nums.split(" ") }
-  array.transpose.map { |nums| nums.join(" ") }.join("\n")
+  source_array = source.split("\n").map(&:split)
+  transposed_array = source_array.transpose
+  transposed_array.map { |nums| nums.join(" ") }.join("\n")
 end

From 8d6ddec2d0c70ea2e7c628c42326e0e1f012d830 Mon Sep 17 00:00:00 2001
From: cheezenaan <cheezenaan@gmail.com>
Date: Wed, 6 Dec 2017 21:06:37 +0900
Subject: [PATCH 4/4] Rename files

---
 lib/{transport.rb => transpose.rb}            | 0
 test/{transport_test.rb => transpose_test.rb} | 0
 2 files changed, 0 insertions(+), 0 deletions(-)
 rename lib/{transport.rb => transpose.rb} (100%)
 rename test/{transport_test.rb => transpose_test.rb} (100%)

diff --git a/lib/transport.rb b/lib/transpose.rb
similarity index 100%
rename from lib/transport.rb
rename to lib/transpose.rb
diff --git a/test/transport_test.rb b/test/transpose_test.rb
similarity index 100%
rename from test/transport_test.rb
rename to test/transpose_test.rb