From 00ce65ab8bc23bc8926e7856a6a134d92c1af853 Mon Sep 17 00:00:00 2001
From: popmac <parade8823@gmail.com>
Date: Wed, 6 Dec 2017 15:07:32 +0900
Subject: [PATCH] =?UTF-8?q?transport=E3=83=A1=E3=82=BD=E3=83=83=E3=83=89?=
 =?UTF-8?q?=E3=82=92=E3=83=AA=E3=83=95=E3=82=A1=E3=82=AF=E3=82=BF=E3=83=AA?=
 =?UTF-8?q?=E3=83=B3=E3=82=B0=E3=80=82?=
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2行目では、splitメソッドの引数を省略して、mapメソッドで&:のイディオムを使用。

3行目では、行と列の入れ替えのためにArray#transposeを使用。
---
 lib/transport.rb | 13 +++----------
 1 file changed, 3 insertions(+), 10 deletions(-)

diff --git a/lib/transport.rb b/lib/transport.rb
index d930638..e686c07 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
+  array = source.split("\n").map(&:split)
+  array.transpose.map {|s| s.join(" ")}.join("\n")
+end