From 161055c4087cb3dba487661d003089cb2aa19871 Mon Sep 17 00:00:00 2001
From: "yuichi.imori" <yuichi.imori@classi.jp>
Date: Thu, 13 Jun 2024 16:58:18 +0900
Subject: [PATCH 01/23] =?UTF-8?q?add:=20optparse=E3=82=92=E5=AE=9A?=
 =?UTF-8?q?=E7=BE=A9=E3=80=81l=E3=82=AA=E3=83=97=E3=82=B7=E3=83=A7?=
 =?UTF-8?q?=E3=83=B3=E3=82=92=E8=AA=AD=E3=81=BF=E8=BE=BC=E3=82=81=E3=82=8B?=
 =?UTF-8?q?=E3=82=88=E3=81=86=E3=81=AB=E3=81=97=E3=81=9F?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 04.ls/ls.rb | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/04.ls/ls.rb b/04.ls/ls.rb
index 6b1cfd48e4..083690e5f2 100755
--- a/04.ls/ls.rb
+++ b/04.ls/ls.rb
@@ -1,10 +1,15 @@
 #!/usr/bin/env ruby
 # frozen_string_literal: true
 
+require 'optparse'
+
 MAX_CHUNK = 3
 TAB_SPACE = 8
 
-file_paths = Dir.entries('.')
+file_paths = Dir.entries('.').sort
+
+opt = OptionParser.new
+params = opt.getopts(ARGV, 'l')
 
 def except_hidden_file(file_paths)
   file_paths.reject { |element| element[0] == '.' }
@@ -21,7 +26,6 @@ def transpose_chunks(sliced_paths, num_rows)
   padded_slices.transpose.map(&:compact)
 end
 
-file_paths = file_paths.sort
 file_paths = except_hidden_file(file_paths)
 
 num_rows = (file_paths.size.to_f / MAX_CHUNK).ceil

From aac37f66b256f11531113d059b0be29667095c94 Mon Sep 17 00:00:00 2001
From: "yuichi.imori" <yuichi.imori@classi.jp>
Date: Mon, 17 Jun 2024 10:52:56 +0900
Subject: [PATCH 02/23] change: params -> options

---
 04.ls/ls.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/04.ls/ls.rb b/04.ls/ls.rb
index 083690e5f2..03b03691ce 100755
--- a/04.ls/ls.rb
+++ b/04.ls/ls.rb
@@ -9,7 +9,7 @@
 file_paths = Dir.entries('.').sort
 
 opt = OptionParser.new
-params = opt.getopts(ARGV, 'l')
+options = opt.getopts(ARGV, 'l')
 
 def except_hidden_file(file_paths)
   file_paths.reject { |element| element[0] == '.' }

From e2dc4f70b062959902ac9ed76239fe89f69bc82c Mon Sep 17 00:00:00 2001
From: "yuichi.imori" <yuichi.imori@classi.jp>
Date: Mon, 17 Jun 2024 10:53:56 +0900
Subject: [PATCH 03/23] =?UTF-8?q?add:=20l=E3=82=AA=E3=83=97=E3=82=B7?=
 =?UTF-8?q?=E3=83=A7=E3=83=B3=E3=81=8C=E6=8C=87=E5=AE=9A=E3=81=95=E3=82=8C?=
 =?UTF-8?q?=E3=81=9F=E6=99=82=E3=81=AE=E5=88=86=E5=B2=90=E3=81=A8=E3=81=AA?=
 =?UTF-8?q?=E3=82=8Bif=E6=96=87=E3=82=92=E3=81=B2=E3=81=A8=E3=81=BE?=
 =?UTF-8?q?=E3=81=9A=E4=BD=9C=E6=88=90?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 04.ls/ls.rb | 28 ++++++++++++++++------------
 1 file changed, 16 insertions(+), 12 deletions(-)

diff --git a/04.ls/ls.rb b/04.ls/ls.rb
index 03b03691ce..9cf0ef54a2 100755
--- a/04.ls/ls.rb
+++ b/04.ls/ls.rb
@@ -28,17 +28,21 @@ def transpose_chunks(sliced_paths, num_rows)
 
 file_paths = except_hidden_file(file_paths)
 
-num_rows = (file_paths.size.to_f / MAX_CHUNK).ceil
-sliced_paths = chunk_file_paths(file_paths, num_rows)
-shaped_file_paths_array = transpose_chunks(sliced_paths, num_rows)
-
-max_string_length = file_paths.map(&:length).max
-
-shaped_file_paths_array.each do |array_element|
-  array_element.each do |element|
-    tab_count = ((max_string_length - element.length) / TAB_SPACE.to_f).ceil + 1 # タブの挿入する回数を計算
-    print element
-    print "\t" * tab_count
+if options['l']
+  p 'l'
+else
+  num_rows = (file_paths.size.to_f / MAX_CHUNK).ceil
+  sliced_paths = chunk_file_paths(file_paths, num_rows)
+  shaped_file_paths_array = transpose_chunks(sliced_paths, num_rows)
+
+  max_string_length = file_paths.map(&:length).max
+
+  shaped_file_paths_array.each do |array_element|
+    array_element.each do |element|
+      tab_count = ((max_string_length - element.length) / TAB_SPACE.to_f).ceil + 1 # タブの挿入する回数を計算
+      print element
+      print "\t" * tab_count
+    end
+    puts
   end
-  puts
 end

From ff05df0dd2e623ce3767bd8c5d349afa011a12cb Mon Sep 17 00:00:00 2001
From: "yuichi.imori" <yuichi.imori@classi.jp>
Date: Mon, 17 Jun 2024 11:00:00 +0900
Subject: [PATCH 04/23] =?UTF-8?q?change:=209~12=E8=A1=8C=E7=9B=AE=E3=82=92?=
 =?UTF-8?q?=E3=83=A1=E3=82=BD=E3=83=83=E3=83=89=E3=81=AE=E4=B8=8B=E3=81=AB?=
 =?UTF-8?q?=E7=A7=BB=E5=8B=95?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 04.ls/ls.rb | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/04.ls/ls.rb b/04.ls/ls.rb
index 9cf0ef54a2..cddc5bb4ac 100755
--- a/04.ls/ls.rb
+++ b/04.ls/ls.rb
@@ -6,11 +6,6 @@
 MAX_CHUNK = 3
 TAB_SPACE = 8
 
-file_paths = Dir.entries('.').sort
-
-opt = OptionParser.new
-options = opt.getopts(ARGV, 'l')
-
 def except_hidden_file(file_paths)
   file_paths.reject { |element| element[0] == '.' }
 end
@@ -26,6 +21,11 @@ def transpose_chunks(sliced_paths, num_rows)
   padded_slices.transpose.map(&:compact)
 end
 
+file_paths = Dir.entries('.').sort
+
+opt = OptionParser.new
+options = opt.getopts(ARGV, 'l')
+
 file_paths = except_hidden_file(file_paths)
 
 if options['l']

From dfa39575ef76251ad4b6f49d69696d9fde89e011 Mon Sep 17 00:00:00 2001
From: "yuichi.imori" <yuichi.imori@classi.jp>
Date: Mon, 17 Jun 2024 12:14:35 +0900
Subject: [PATCH 05/23] =?UTF-8?q?define:=20FILE=5FTYPE,=20FILE=5FMODE?=
 =?UTF-8?q?=E3=82=92=E5=AE=9A=E7=BE=A9?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 04.ls/ls.rb | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/04.ls/ls.rb b/04.ls/ls.rb
index cddc5bb4ac..37f3c352d0 100755
--- a/04.ls/ls.rb
+++ b/04.ls/ls.rb
@@ -6,6 +6,27 @@
 MAX_CHUNK = 3
 TAB_SPACE = 8
 
+FILE_TYPE = {
+  'fifo' => 'p',
+  'characterSpecial' => 'c',
+  'directory' => 'd',
+  'blockSpecial' => 'b',
+  'file' => 'f',
+  'link' => 'l',
+  'socket' => 's'
+}.freeze
+
+FILE_MODE = {
+  '0' => '---',
+  '1' => '--x',
+  '2' => '-w-',
+  '3' => '-wx',
+  '4' => 'r--',
+  '5' => 'r-x',
+  '6' => 'rw-',
+  '7' => 'rwx'
+}.freeze
+
 def except_hidden_file(file_paths)
   file_paths.reject { |element| element[0] == '.' }
 end

From 867e38aca0e58d87286986014cff39ad296d12ad Mon Sep 17 00:00:00 2001
From: "yuichi.imori" <yuichi.imori@classi.jp>
Date: Mon, 17 Jun 2024 12:16:16 +0900
Subject: [PATCH 06/23] define: require 'etc'

---
 04.ls/ls.rb | 1 +
 1 file changed, 1 insertion(+)

diff --git a/04.ls/ls.rb b/04.ls/ls.rb
index 37f3c352d0..d1916fcc8c 100755
--- a/04.ls/ls.rb
+++ b/04.ls/ls.rb
@@ -2,6 +2,7 @@
 # frozen_string_literal: true
 
 require 'optparse'
+require 'etc'
 
 MAX_CHUNK = 3
 TAB_SPACE = 8

From 38942f2647f48a18b4c9c7a50dfcc17869a85e48 Mon Sep 17 00:00:00 2001
From: "yuichi.imori" <yuichi.imori@classi.jp>
Date: Mon, 17 Jun 2024 12:17:16 +0900
Subject: [PATCH 07/23] =?UTF-8?q?add:=208=E9=80=B2=E6=95=B0=E3=81=AE?=
 =?UTF-8?q?=E3=83=95=E3=82=A1=E3=82=A4=E3=83=AB=E3=83=A2=E3=83=BC=E3=83=89?=
 =?UTF-8?q?=E3=82=92=E6=A0=BC=E7=B4=8D=E3=81=99=E3=82=8B=E5=A4=89=E6=95=B0?=
 =?UTF-8?q?file=5Fmode=5Factal=E3=82=92=E5=AE=9A=E7=BE=A9?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 04.ls/ls.rb | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/04.ls/ls.rb b/04.ls/ls.rb
index d1916fcc8c..d9096fc55e 100755
--- a/04.ls/ls.rb
+++ b/04.ls/ls.rb
@@ -51,7 +51,10 @@ def transpose_chunks(sliced_paths, num_rows)
 file_paths = except_hidden_file(file_paths)
 
 if options['l']
-  p 'l'
+  file_paths.each do |file_path|
+    file_stat = File.lstat(file_path)
+    file_mode_octal = file_stat.mode.to_s(8).rjust(6, '0')
+  end
 else
   num_rows = (file_paths.size.to_f / MAX_CHUNK).ceil
   sliced_paths = chunk_file_paths(file_paths, num_rows)

From 5ae357c09f9fd535ce85f0c7f934f438e95f08a3 Mon Sep 17 00:00:00 2001
From: "yuichi.imori" <yuichi.imori@classi.jp>
Date: Mon, 17 Jun 2024 12:35:04 +0900
Subject: [PATCH 08/23] =?UTF-8?q?add:=20nlink,=20uid,=20gid,=20size,=20mti?=
 =?UTF-8?q?me=E3=82=92=E5=8F=96=E5=BE=97?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 04.ls/ls.rb | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/04.ls/ls.rb b/04.ls/ls.rb
index d9096fc55e..b6dd29a1f0 100755
--- a/04.ls/ls.rb
+++ b/04.ls/ls.rb
@@ -54,6 +54,13 @@ def transpose_chunks(sliced_paths, num_rows)
   file_paths.each do |file_path|
     file_stat = File.lstat(file_path)
     file_mode_octal = file_stat.mode.to_s(8).rjust(6, '0')
+    nlink = file_stat.nlink
+    uid = Etc.getpwuid(file_stat.uid).name
+    gid = Etc.getgrgid(file_stat.gid).name
+    size = file_stat.size
+    mtime = file_stat.mtime.strftime('%-m %d %H:%M')
+
+    puts "#{file_mode}\t#{nlink}\t#{uid}\t#{gid}\t#{size}\t#{mtime}\t#{file_path}"
   end
 else
   num_rows = (file_paths.size.to_f / MAX_CHUNK).ceil

From e3af6bfef0b39470e8cd6b5cefd9ce3005fb5355 Mon Sep 17 00:00:00 2001
From: "yuichi.imori" <yuichi.imori@classi.jp>
Date: Mon, 17 Jun 2024 12:59:48 +0900
Subject: [PATCH 09/23] =?UTF-8?q?add:=20=E8=A1=A8=E7=A4=BA=E3=81=99?=
 =?UTF-8?q?=E3=82=8B=E3=83=95=E3=82=A1=E3=82=A4=E3=83=AB=E3=83=A2=E3=83=BC?=
 =?UTF-8?q?=E3=83=89=E3=81=AE=E6=96=87=E5=AD=97=E5=88=97=E3=82=92=E4=BD=9C?=
 =?UTF-8?q?=E6=88=90=E3=81=99=E3=82=8B=E3=83=A1=E3=82=BD=E3=83=83=E3=83=89?=
 =?UTF-8?q?convert=5Ffile=5Fmode=E3=82=92=E4=BD=9C=E6=88=90?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

8進数に変換したファイルモードの数値列から、lsコマンドで表示する文字列形式に変換するメソッド
- ファイルの種類はfile_mode.ftypeから取得し、予め作成しているFILE_TYPEのhashから対応する文字をとってくる
- ファイルの読み書き権限などは8進数数値列の4~6番目が対応しているため、その部分を取り出してFILE_MODEのhashから対応する文字列を取得した
---
 04.ls/ls.rb | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/04.ls/ls.rb b/04.ls/ls.rb
index b6dd29a1f0..69c4d32964 100755
--- a/04.ls/ls.rb
+++ b/04.ls/ls.rb
@@ -43,6 +43,13 @@ def transpose_chunks(sliced_paths, num_rows)
   padded_slices.transpose.map(&:compact)
 end
 
+def convert_file_mode(file_stat)
+  file_mode_octal = file_stat.mode.to_s(8).rjust(6, '0')
+  file_mode = FILE_TYPE[file_stat.ftype].to_s
+  file_permissions = file_mode_octal.slice(3..-1).chars.map { |char| FILE_MODE[char] }.join
+  file_mode + file_permissions
+end
+
 file_paths = Dir.entries('.').sort
 
 opt = OptionParser.new
@@ -53,7 +60,7 @@ def transpose_chunks(sliced_paths, num_rows)
 if options['l']
   file_paths.each do |file_path|
     file_stat = File.lstat(file_path)
-    file_mode_octal = file_stat.mode.to_s(8).rjust(6, '0')
+    file_mode = convert_file_mode(file_stat)
     nlink = file_stat.nlink
     uid = Etc.getpwuid(file_stat.uid).name
     gid = Etc.getgrgid(file_stat.gid).name

From 4bde95912848e54544e268803f1aca658df977e9 Mon Sep 17 00:00:00 2001
From: "yuichi.imori" <yuichi.imori@classi.jp>
Date: Mon, 17 Jun 2024 13:08:05 +0900
Subject: [PATCH 10/23] =?UTF-8?q?add:=20=E3=83=95=E3=82=A1=E3=82=A4?=
 =?UTF-8?q?=E3=83=AB=E3=81=AE=E7=B7=8F=E3=82=B5=E3=82=A4=E3=82=BA=E3=81=AE?=
 =?UTF-8?q?=E8=A1=A8=E7=A4=BA=E9=83=A8=E5=88=86total=E3=81=AE=E4=BD=9C?=
 =?UTF-8?q?=E6=88=90?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 04.ls/ls.rb | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/04.ls/ls.rb b/04.ls/ls.rb
index 69c4d32964..c4cc037a10 100755
--- a/04.ls/ls.rb
+++ b/04.ls/ls.rb
@@ -58,6 +58,9 @@ def convert_file_mode(file_stat)
 file_paths = except_hidden_file(file_paths)
 
 if options['l']
+  total_blocks = file_paths.sum { |file_path| File.lstat(file_path).blocks }
+  puts "total #{total_blocks}"
+
   file_paths.each do |file_path|
     file_stat = File.lstat(file_path)
     file_mode = convert_file_mode(file_stat)

From 08fcb9ad5f0ef96aca75b87a067f134139288faa Mon Sep 17 00:00:00 2001
From: "yuichi.imori" <yuichi.imori@classi.jp>
Date: Mon, 17 Jun 2024 13:46:08 +0900
Subject: [PATCH 11/23] =?UTF-8?q?add:=20=E3=83=95=E3=82=A1=E3=82=A4?=
 =?UTF-8?q?=E3=83=AB=E3=81=AE=E7=89=B9=E6=AE=8A=E6=A8=A9=E9=99=90=E3=82=92?=
 =?UTF-8?q?=E7=A2=BA=E8=AA=8D=E3=81=99=E3=82=8B=E3=83=A1=E3=82=BD=E3=83=83?=
 =?UTF-8?q?=E3=83=89apply=5Fspecial=5Fmode=E3=82=92=E8=BF=BD=E5=8A=A0?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

ファイルモードの書き換えを実行するために、SPECIAL_MODEを作成、置き換える文字を定義
置き換えが発生するかどうかは8進数変換した場合の3文字目に存在するため、そこが'0'であればこの処理は実行されない
---
 04.ls/ls.rb | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/04.ls/ls.rb b/04.ls/ls.rb
index c4cc037a10..0b1d8bbc70 100755
--- a/04.ls/ls.rb
+++ b/04.ls/ls.rb
@@ -28,6 +28,12 @@
   '7' => 'rwx'
 }.freeze
 
+SPECIAL_MODE = [
+  { bit: '4', index: 2, exec: 's', no_exec: 'S' },
+  { bit: '2', index: 5, exec: 's', no_exec: 'S' },
+  { bit: '1', index: 8, exec: 't', no_exec: 'T' }
+].freeze
+
 def except_hidden_file(file_paths)
   file_paths.reject { |element| element[0] == '.' }
 end
@@ -47,9 +53,20 @@ def convert_file_mode(file_stat)
   file_mode_octal = file_stat.mode.to_s(8).rjust(6, '0')
   file_mode = FILE_TYPE[file_stat.ftype].to_s
   file_permissions = file_mode_octal.slice(3..-1).chars.map { |char| FILE_MODE[char] }.join
+  # 特殊権限の確認
+  file_permissions = apply_special_modes(file_mode_octal[2], file_permissions) if file_mode_octal[2] != '0'
   file_mode + file_permissions
 end
 
+def apply_special_modes(special_modes, permissions)
+  SPECIAL_MODE.each do |mode|
+    if special_modes == mode[:bit]
+      permissions[mode[:index]] == 'x' ? mode[:exec] : mode[:no_exec]
+    end
+  end
+  permissions
+end
+
 file_paths = Dir.entries('.').sort
 
 opt = OptionParser.new

From fdfadeccf36894d2b436693a1d5f3de6bf81bc90 Mon Sep 17 00:00:00 2001
From: "yuichi.imori" <yuichi.imori@classi.jp>
Date: Mon, 17 Jun 2024 13:59:20 +0900
Subject: [PATCH 12/23] =?UTF-8?q?add:=20=E4=BA=88=E3=82=81=E8=A1=A8?=
 =?UTF-8?q?=E7=A4=BA=E3=81=99=E3=82=8B=E3=83=95=E3=82=A1=E3=82=A4=E3=83=AB?=
 =?UTF-8?q?=E3=83=A2=E3=83=BC=E3=83=89=E3=82=92hash=E3=81=AB=E6=A0=BC?=
 =?UTF-8?q?=E7=B4=8D=E3=81=99=E3=82=8B=E3=81=9F=E3=82=81=E3=81=AB=E3=83=A1?=
 =?UTF-8?q?=E3=82=BD=E3=83=83=E3=83=89format=5Ffile=5Fmode=E3=82=92?=
 =?UTF-8?q?=E5=AE=9A=E7=BE=A9?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

map関数でfile_pathひとつを送り、返り血としてファイルモードの情報を得る
---
 04.ls/ls.rb | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/04.ls/ls.rb b/04.ls/ls.rb
index 0b1d8bbc70..31bb06cb8c 100755
--- a/04.ls/ls.rb
+++ b/04.ls/ls.rb
@@ -67,6 +67,19 @@ def apply_special_modes(special_modes, permissions)
   permissions
 end
 
+def format_file_mode(file_path)
+  file_stat = File.lstat(file_path)
+  {
+    file_mode: convert_file_mode(file_stat),
+    nlink: file_stat.nlink,
+    uid: Etc.getpwuid(file_stat.uid).name,
+    gid: Etc.getgrgid(file_stat.gid).name,
+    size: file_stat.size,
+    mtime: file_stat.mtime.strftime('%-m %d %H:%M'),
+    blocks: file_stat.blocks
+  }
+end
+
 file_paths = Dir.entries('.').sort
 
 opt = OptionParser.new
@@ -75,7 +88,9 @@ def apply_special_modes(special_modes, permissions)
 file_paths = except_hidden_file(file_paths)
 
 if options['l']
-  total_blocks = file_paths.sum { |file_path| File.lstat(file_path).blocks }
+  file_modes = file_paths.map { |file_path| format_file_mode(file_path) }
+  total_blocks = file_modes.map { |file_mode| file_mode[:blocks] }.sum
+
   puts "total #{total_blocks}"
 
   file_paths.each do |file_path|

From 241960a5ff2315380b8cf398423193bf2d1e3708 Mon Sep 17 00:00:00 2001
From: "yuichi.imori" <yuichi.imori@classi.jp>
Date: Mon, 17 Jun 2024 14:25:39 +0900
Subject: [PATCH 13/23] =?UTF-8?q?fix:=20format=5Ffile=5Fmode=E3=81=A7?=
 =?UTF-8?q?=E6=A0=BC=E7=B4=8D=E3=81=99=E3=82=8B=E6=96=87=E5=AD=97=E5=88=97?=
 =?UTF-8?q?=E3=81=AE=E7=B4=B0=E3=81=8B=E3=81=AA=E5=9E=8B=E3=81=AE=E5=A4=89?=
 =?UTF-8?q?=E6=9B=B4?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 04.ls/ls.rb | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/04.ls/ls.rb b/04.ls/ls.rb
index 31bb06cb8c..7548e42679 100755
--- a/04.ls/ls.rb
+++ b/04.ls/ls.rb
@@ -71,11 +71,12 @@ def format_file_mode(file_path)
   file_stat = File.lstat(file_path)
   {
     file_mode: convert_file_mode(file_stat),
-    nlink: file_stat.nlink,
+    nlink: file_stat.nlink.to_s,
     uid: Etc.getpwuid(file_stat.uid).name,
     gid: Etc.getgrgid(file_stat.gid).name,
-    size: file_stat.size,
+    size: file_stat.size.to_s,
     mtime: file_stat.mtime.strftime('%-m %d %H:%M'),
+    file_path: file_path,
     blocks: file_stat.blocks
   }
 end

From 6757bafb33c4af05e235f077a434e0970fde093c Mon Sep 17 00:00:00 2001
From: "yuichi.imori" <yuichi.imori@classi.jp>
Date: Mon, 17 Jun 2024 14:27:02 +0900
Subject: [PATCH 14/23] =?UTF-8?q?define:=20=E3=83=95=E3=82=A1=E3=82=A4?=
 =?UTF-8?q?=E3=83=AB=E6=83=85=E5=A0=B1=E3=81=AE=E6=9C=80=E5=A4=A7=E3=81=AE?=
 =?UTF-8?q?=E6=96=87=E5=AD=97=E6=95=B0=E3=82=92=E5=8F=96=E5=BE=97=E3=81=99?=
 =?UTF-8?q?=E3=82=8B=E3=83=A1=E3=82=BD=E3=83=83=E3=83=89calculate=5Fmax=5F?=
 =?UTF-8?q?string=5Fmodes=E3=82=92=E5=AE=9A=E7=BE=A9?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 04.ls/ls.rb | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/04.ls/ls.rb b/04.ls/ls.rb
index 7548e42679..bcffecc56a 100755
--- a/04.ls/ls.rb
+++ b/04.ls/ls.rb
@@ -81,6 +81,16 @@ def format_file_mode(file_path)
   }
 end
 
+def calclate_max_string_modes(file_modes)
+  {
+    nlink: file_modes.map { |file_mode| file_mode[:nlink].size }.max,
+    uid: file_modes.map { |file_mode| file_mode[:uid].size }.max,
+    gid: file_modes.map { |file_mode| file_mode[:gid].size }.max,
+    size: file_modes.map { |file_mode| file_mode[:size].size }.max,
+    mtime: file_modes.map { |file_mode| file_mode[:mtime].size }.max
+  }
+end
+
 file_paths = Dir.entries('.').sort
 
 opt = OptionParser.new
@@ -104,6 +114,7 @@ def format_file_mode(file_path)
     mtime = file_stat.mtime.strftime('%-m %d %H:%M')
 
     puts "#{file_mode}\t#{nlink}\t#{uid}\t#{gid}\t#{size}\t#{mtime}\t#{file_path}"
+  max_string_modes = calclate_max_string_modes(file_modes)
   end
 else
   num_rows = (file_paths.size.to_f / MAX_CHUNK).ceil

From 8cc5450f8f2550f919203fc2aff8ebc27f0c8957 Mon Sep 17 00:00:00 2001
From: "yuichi.imori" <yuichi.imori@classi.jp>
Date: Mon, 17 Jun 2024 14:27:57 +0900
Subject: [PATCH 15/23] =?UTF-8?q?change:=20format=5Ffile=5Fmode=E3=81=A7?=
 =?UTF-8?q?=E6=B1=82=E3=82=81=E3=81=9F=E3=83=95=E3=82=A1=E3=82=A4=E3=83=AB?=
 =?UTF-8?q?=E6=83=85=E5=A0=B1=E3=82=92=E4=BD=BF=E7=94=A8=E3=81=97=E3=81=A6?=
 =?UTF-8?q?=E6=96=87=E5=AD=97=E3=81=AE=E5=87=BA=E5=8A=9B=E3=82=92=E5=AE=9F?=
 =?UTF-8?q?=E8=A1=8C?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 04.ls/ls.rb | 22 ++++++++++++----------
 1 file changed, 12 insertions(+), 10 deletions(-)

diff --git a/04.ls/ls.rb b/04.ls/ls.rb
index bcffecc56a..d2c56bb226 100755
--- a/04.ls/ls.rb
+++ b/04.ls/ls.rb
@@ -104,17 +104,19 @@ def calclate_max_string_modes(file_modes)
 
   puts "total #{total_blocks}"
 
-  file_paths.each do |file_path|
-    file_stat = File.lstat(file_path)
-    file_mode = convert_file_mode(file_stat)
-    nlink = file_stat.nlink
-    uid = Etc.getpwuid(file_stat.uid).name
-    gid = Etc.getgrgid(file_stat.gid).name
-    size = file_stat.size
-    mtime = file_stat.mtime.strftime('%-m %d %H:%M')
-
-    puts "#{file_mode}\t#{nlink}\t#{uid}\t#{gid}\t#{size}\t#{mtime}\t#{file_path}"
   max_string_modes = calclate_max_string_modes(file_modes)
+  file_modes.each do |file_mode|
+    file_mode_print = [
+      file_mode[:file_mode],
+      file_mode[:nlink].rjust(max_string_modes[:nlink]),
+      file_mode[:uid].ljust(max_string_modes[:uid]),
+      '',
+      file_mode[:gid].ljust(max_string_modes[:gid]),
+      file_mode[:size].rjust(max_string_modes[:size]),
+      file_mode[:mtime].ljust(max_string_modes[:mtime]),
+      file_mode[:file_path]
+    ].join(' ')
+    puts file_mode_print
   end
 else
   num_rows = (file_paths.size.to_f / MAX_CHUNK).ceil

From f6df87eca96d7bf9ab8cdde65b13bfa6ff867c66 Mon Sep 17 00:00:00 2001
From: "yuichi.imori" <yuichi.imori@classi.jp>
Date: Mon, 17 Jun 2024 14:39:08 +0900
Subject: [PATCH 16/23] =?UTF-8?q?fix:=20=E5=90=8C=E4=B8=80=E5=90=8D?=
 =?UTF-8?q?=E3=81=AEhash=E3=82=92=E7=9C=81=E7=95=A5=E8=A8=98=E6=B3=95?=
 =?UTF-8?q?=E3=81=AB=E5=A4=89=E6=9B=B4?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 04.ls/ls.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/04.ls/ls.rb b/04.ls/ls.rb
index d2c56bb226..bd93b5dcc3 100755
--- a/04.ls/ls.rb
+++ b/04.ls/ls.rb
@@ -76,7 +76,7 @@ def format_file_mode(file_path)
     gid: Etc.getgrgid(file_stat.gid).name,
     size: file_stat.size.to_s,
     mtime: file_stat.mtime.strftime('%-m %d %H:%M'),
-    file_path: file_path,
+    file_path:,
     blocks: file_stat.blocks
   }
 end

From 44cdd4b2bf4e63ae14b8be6c9149f79f8411c8da Mon Sep 17 00:00:00 2001
From: "yuichi.imori" <yuichi.imori@classi.jp>
Date: Mon, 17 Jun 2024 14:46:35 +0900
Subject: [PATCH 17/23] =?UTF-8?q?change:=20=E7=A9=BA=E7=99=BD=E5=9F=8B?=
 =?UTF-8?q?=E3=82=81=E3=81=AE=E8=AA=BF=E6=95=B4?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 04.ls/ls.rb | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/04.ls/ls.rb b/04.ls/ls.rb
index bd93b5dcc3..a7ac3fe0a6 100755
--- a/04.ls/ls.rb
+++ b/04.ls/ls.rb
@@ -110,10 +110,9 @@ def calclate_max_string_modes(file_modes)
       file_mode[:file_mode],
       file_mode[:nlink].rjust(max_string_modes[:nlink]),
       file_mode[:uid].ljust(max_string_modes[:uid]),
-      '',
-      file_mode[:gid].ljust(max_string_modes[:gid]),
-      file_mode[:size].rjust(max_string_modes[:size]),
-      file_mode[:mtime].ljust(max_string_modes[:mtime]),
+      file_mode[:gid].rjust(max_string_modes[:gid] + 1),
+      file_mode[:size].rjust(max_string_modes[:size] + 1),
+      file_mode[:mtime].rjust(max_string_modes[:mtime] + 1),
       file_mode[:file_path]
     ].join(' ')
     puts file_mode_print

From 69c4b5369e5af9885680b6932999627ef53fca67 Mon Sep 17 00:00:00 2001
From: "yuichi.imori" <yuichi.imori@classi.jp>
Date: Tue, 18 Jun 2024 11:26:17 +0900
Subject: [PATCH 18/23] =?UTF-8?q?fix:=20=E3=83=95=E3=82=A1=E3=82=A4?=
 =?UTF-8?q?=E3=83=AB=E3=82=92=E7=A4=BA=E3=81=99=E6=96=87=E5=AD=97=E3=81=8C?=
 =?UTF-8?q?=E9=96=93=E9=81=95=E3=81=A3=E3=81=A6=E3=81=84=E3=81=9F=E3=81=AE?=
 =?UTF-8?q?=E3=81=A7=E4=BF=AE=E6=AD=A3?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

f -> -
---
 04.ls/ls.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/04.ls/ls.rb b/04.ls/ls.rb
index a7ac3fe0a6..65f6c50d15 100755
--- a/04.ls/ls.rb
+++ b/04.ls/ls.rb
@@ -12,7 +12,7 @@
   'characterSpecial' => 'c',
   'directory' => 'd',
   'blockSpecial' => 'b',
-  'file' => 'f',
+  'file' => '-',
   'link' => 'l',
   'socket' => 's'
 }.freeze

From 4d3313cf9be8da8b6da3d3f425b2bf9077173a0d Mon Sep 17 00:00:00 2001
From: "yuichi.imori" <yuichi.imori@classi.jp>
Date: Tue, 18 Jun 2024 11:58:54 +0900
Subject: [PATCH 19/23] =?UTF-8?q?fix:=20=E3=82=B9=E3=83=86=E3=82=A3?=
 =?UTF-8?q?=E3=83=83=E3=82=AD=E3=83=BC=E3=83=93=E3=83=BC=E3=83=88=E3=81=AA?=
 =?UTF-8?q?=E3=81=A9=E3=81=AE=E6=A8=A9=E9=99=90=E3=81=AE=E7=A2=BA=E8=AA=8D?=
 =?UTF-8?q?=E5=BE=8C=E3=80=81=E6=96=87=E5=AD=97=E5=88=97=E3=81=AB=E5=8F=8D?=
 =?UTF-8?q?=E6=98=A0=E3=81=95=E3=81=9B=E3=82=8B=E5=87=A6=E7=90=86=E3=81=8C?=
 =?UTF-8?q?=E3=81=86=E3=81=BE=E3=81=8F=E3=81=84=E3=81=A3=E3=81=A6=E3=81=84?=
 =?UTF-8?q?=E3=81=AA=E3=81=8B=E3=81=A3=E3=81=9F=E3=81=AE=E3=81=A7=E4=BF=AE?=
 =?UTF-8?q?=E6=AD=A3?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 04.ls/ls.rb | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/04.ls/ls.rb b/04.ls/ls.rb
index 65f6c50d15..dc4ef18716 100755
--- a/04.ls/ls.rb
+++ b/04.ls/ls.rb
@@ -60,9 +60,13 @@ def convert_file_mode(file_stat)
 
 def apply_special_modes(special_modes, permissions)
   SPECIAL_MODE.each do |mode|
-    if special_modes == mode[:bit]
-      permissions[mode[:index]] == 'x' ? mode[:exec] : mode[:no_exec]
-    end
+    next unless special_modes == mode[:bit]
+
+    permissions[mode[:index]] = if permissions[mode[:index]] == 'x'
+                                  mode[:exec]
+                                else
+                                  mode[:no_exec]
+                                end
   end
   permissions
 end

From 1b9593fb6d8876cf9f6a1f1c126c6482fa7540f9 Mon Sep 17 00:00:00 2001
From: "yuichi.imori" <yuichi.imori@classi.jp>
Date: Wed, 19 Jun 2024 10:18:42 +0900
Subject: [PATCH 20/23] =?UTF-8?q?add:=20apply=5Fspecial=5Fmodes=E3=81=AB?=
 =?UTF-8?q?=E9=96=A2=E3=81=99=E3=82=8B=E8=AA=AC=E6=98=8E=E3=82=92=E8=BF=BD?=
 =?UTF-8?q?=E5=8A=A0?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 04.ls/ls.rb | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/04.ls/ls.rb b/04.ls/ls.rb
index dc4ef18716..b46d8e7e2a 100755
--- a/04.ls/ls.rb
+++ b/04.ls/ls.rb
@@ -53,7 +53,8 @@ def convert_file_mode(file_stat)
   file_mode_octal = file_stat.mode.to_s(8).rjust(6, '0')
   file_mode = FILE_TYPE[file_stat.ftype].to_s
   file_permissions = file_mode_octal.slice(3..-1).chars.map { |char| FILE_MODE[char] }.join
-  # 特殊権限の確認
+  # 特殊権限の確認　特殊権限は8進数に変換されたファイルモードの3文字目に記載されている　そのためfile_mode_octal[2]を参照する
+  # 0は特殊権限なし、なので最初に弾く（apply_special_modesは1か2か4であるかを判別し、当てはめるため）
   file_permissions = apply_special_modes(file_mode_octal[2], file_permissions) if file_mode_octal[2] != '0'
   file_mode + file_permissions
 end

From 1ba92aae5040339e395954ee7c7ced7b9ec3cb35 Mon Sep 17 00:00:00 2001
From: "yuichi.imori" <yuichi.imori@classi.jp>
Date: Wed, 19 Jun 2024 10:30:51 +0900
Subject: [PATCH 21/23] =?UTF-8?q?change:=200=E3=81=A7=E3=81=82=E3=82=8B?=
 =?UTF-8?q?=E3=81=8B=E3=81=A9=E3=81=86=E3=81=8B=E7=A2=BA=E8=AA=8D=E3=81=99?=
 =?UTF-8?q?=E3=82=8Bif=E6=96=87=E3=82=92apply=5Fspecial=5Fmodes=E5=86=85?=
 =?UTF-8?q?=E3=81=AB=E7=A7=BB=E5=8B=95?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

0, 1, 2, 4の判定はapply_special_modes内で行った方が処理としてわかりやすいと考えたから
---
 04.ls/ls.rb | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/04.ls/ls.rb b/04.ls/ls.rb
index b46d8e7e2a..5b6bb31bb1 100755
--- a/04.ls/ls.rb
+++ b/04.ls/ls.rb
@@ -54,12 +54,14 @@ def convert_file_mode(file_stat)
   file_mode = FILE_TYPE[file_stat.ftype].to_s
   file_permissions = file_mode_octal.slice(3..-1).chars.map { |char| FILE_MODE[char] }.join
   # 特殊権限の確認　特殊権限は8進数に変換されたファイルモードの3文字目に記載されている　そのためfile_mode_octal[2]を参照する
-  # 0は特殊権限なし、なので最初に弾く（apply_special_modesは1か2か4であるかを判別し、当てはめるため）
-  file_permissions = apply_special_modes(file_mode_octal[2], file_permissions) if file_mode_octal[2] != '0'
+  file_permissions = apply_special_modes(file_mode_octal[2], file_permissions)
   file_mode + file_permissions
 end
 
 def apply_special_modes(special_modes, permissions)
+  # 0は特殊権限なし、なので最初に弾く（特殊権限は1か2か4であるため）
+  return permissions if special_modes == '0'
+
   SPECIAL_MODE.each do |mode|
     next unless special_modes == mode[:bit]
 

From d4d5ce3ecc7daae812f193923497888c390bc20e Mon Sep 17 00:00:00 2001
From: "yuichi.imori" <yuichi.imori@classi.jp>
Date: Thu, 20 Jun 2024 10:13:25 +0900
Subject: [PATCH 22/23] =?UTF-8?q?fix:=20=E7=89=B9=E6=AE=8A=E6=A8=A9?=
 =?UTF-8?q?=E9=99=90=E3=81=AE=E4=BB=98=E4=B8=8E=E3=83=AD=E3=82=B8=E3=83=83?=
 =?UTF-8?q?=E3=82=AF=E3=81=8C=E9=96=93=E9=81=95=E3=81=A3=E3=81=A6=E3=81=84?=
 =?UTF-8?q?=E3=81=9F=E3=81=AE=E3=81=A7=E4=BF=AE=E6=AD=A3?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

特殊権限は1つしか付与できないと勘違いしていたため、それぞれの権限の確認を1回ずつしかしてこなかった
今回は特殊権限をSUID(4), GUID(2), Sticky Bit(1)の順で確認し、存在していた場合は数値を減算するロジックを組んだ

このような計算であれば2進数の方が適しているが、今回はわかりやすさのために8進数変換された状態（コードは10進数）で計算するようにした
---
 04.ls/ls.rb | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/04.ls/ls.rb b/04.ls/ls.rb
index 5b6bb31bb1..532268a86a 100755
--- a/04.ls/ls.rb
+++ b/04.ls/ls.rb
@@ -29,9 +29,9 @@
 }.freeze
 
 SPECIAL_MODE = [
-  { bit: '4', index: 2, exec: 's', no_exec: 'S' },
-  { bit: '2', index: 5, exec: 's', no_exec: 'S' },
-  { bit: '1', index: 8, exec: 't', no_exec: 'T' }
+  { bit: 4, index: 2, exec: 's', no_exec: 'S' },
+  { bit: 2, index: 5, exec: 's', no_exec: 'S' },
+  { bit: 1, index: 8, exec: 't', no_exec: 'T' }
 ].freeze
 
 def except_hidden_file(file_paths)
@@ -54,17 +54,18 @@ def convert_file_mode(file_stat)
   file_mode = FILE_TYPE[file_stat.ftype].to_s
   file_permissions = file_mode_octal.slice(3..-1).chars.map { |char| FILE_MODE[char] }.join
   # 特殊権限の確認　特殊権限は8進数に変換されたファイルモードの3文字目に記載されている　そのためfile_mode_octal[2]を参照する
-  file_permissions = apply_special_modes(file_mode_octal[2], file_permissions)
+  file_permissions = apply_special_modes(file_mode_octal[2].to_i, file_permissions)
   file_mode + file_permissions
 end
 
 def apply_special_modes(special_modes, permissions)
   # 0は特殊権限なし、なので最初に弾く（特殊権限は1か2か4であるため）
-  return permissions if special_modes == '0'
+  return permissions if special_modes.zero?
 
   SPECIAL_MODE.each do |mode|
-    next unless special_modes == mode[:bit]
+    next unless special_modes >= mode[:bit]
 
+    special_modes -= mode[:bit]
     permissions[mode[:index]] = if permissions[mode[:index]] == 'x'
                                   mode[:exec]
                                 else

From 74c2e8cd548a014bd189666a10fa3ddb2415f774 Mon Sep 17 00:00:00 2001
From: "yuichi.imori" <yuichi.imori@classi.jp>
Date: Fri, 21 Jun 2024 10:28:11 +0900
Subject: [PATCH 23/23] =?UTF-8?q?change:=20=E7=89=B9=E6=AE=8A=E6=A8=A9?=
 =?UTF-8?q?=E9=99=90=E3=81=AE=E5=88=A4=E5=AE=9A=E3=82=92=E3=83=93=E3=83=83?=
 =?UTF-8?q?=E3=83=88=E6=BC=94=E7=AE=97=E3=81=AB=E5=A4=89=E6=9B=B4?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

&を用い、ビット演算の論理積で2進数ごとの桁の判定を行った
---
 04.ls/ls.rb | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/04.ls/ls.rb b/04.ls/ls.rb
index 532268a86a..83dd69aa4b 100755
--- a/04.ls/ls.rb
+++ b/04.ls/ls.rb
@@ -63,9 +63,8 @@ def apply_special_modes(special_modes, permissions)
   return permissions if special_modes.zero?
 
   SPECIAL_MODE.each do |mode|
-    next unless special_modes >= mode[:bit]
+    next unless (special_modes & mode[:bit]).positive?
 
-    special_modes -= mode[:bit]
     permissions[mode[:index]] = if permissions[mode[:index]] == 'x'
                                   mode[:exec]
                                 else