2013IT鐵人賽-25-ruby05-練習Learn Ruby The Hard Way網站範例Part 3

2013IT鐵人賽-25-ruby05-練習Learn Ruby The Hard Way網站範例Part 3

這次我們的讀書會選用的是Oreilly 的Ruby程式設計這本書, 然後建議的練習是採用”笨方法學 Ruby” http://lrthw.github.io/ 上面的範例.

今天就來繼續練習網站上面的範例吧 :-)

本次練習使用 EasyCloud 的 VM 來練習, 並連接終端機來操作.

首先先切換到工作目錄吧(我的 git 工作目錄在 /root 目錄下面, 請依造自己的設定來調整)

# cd    /root

將 GitHub  上面的資料同步回來

# git   pull   origin master

remote: Counting objects: 33, done.

remote: Compressing objects: 100% (27/27), done.

remote: Total 31 (delta 7), reused 28 (delta 4)

Unpacking objects: 100% (31/31), done.

From https://github.com/sakanamax/2013ironman

* branch            master     -> FETCH_HEAD

Updating 0cd1772..43d240c

Fast-forward

java/Basic_006_inputData.class           |  Bin 0 -> 1382 bytes

java/Basic_006_inputData.java            |   44 ++++++++++++++++++++++++++++++

java/Basic_007_arithmeticOperators.class |  Bin 0 -> 1249 bytes

java/Basic_007_arithmeticOperators.java  |   39 ++++++++++++++++++++++++++

java/Basic_008_autoCasting.class         |  Bin 0 -> 755 bytes

java/Basic_008_autoCasting.java          |   16 +++++++++++

java/Basic_009_forceCasting.class        |  Bin 0 -> 766 bytes

java/Basic_009_forceCasting.java         |   19 +++++++++++++

java/Basic_010_noticeCasting.class       |  Bin 0 -> 908 bytes

java/Basic_010_noticeCasting.java        |   19 +++++++++++++

java/Basic_011_if.class                  |  Bin 0 -> 923 bytes

java/Basic_011_if.java                   |   29 ++++++++++++++++++++

java/Basic_012_ifElse.class              |  Bin 0 -> 957 bytes

java/Basic_012_ifElse.java               |   31 +++++++++++++++++++++

14 files changed, 197 insertions(+)

create mode 100644 java/Basic_006_inputData.class

create mode 100644 java/Basic_006_inputData.java

create mode 100644 java/Basic_007_arithmeticOperators.class

create mode 100644 java/Basic_007_arithmeticOperators.java

create mode 100644 java/Basic_008_autoCasting.class

create mode 100644 java/Basic_008_autoCasting.java

create mode 100644 java/Basic_009_forceCasting.class

create mode 100644 java/Basic_009_forceCasting.java

create mode 100644 java/Basic_010_noticeCasting.class

create mode 100644 java/Basic_010_noticeCasting.java

create mode 100644 java/Basic_011_if.class

create mode 100644 java/Basic_011_if.java

create mode 100644 java/Basic_012_ifElse.class

create mode 100644 java/Basic_012_ifElse.java

接下來練習 習題 7: 更多印出

建立一個檔案 ex7.rb 於我們建立好的Lab-LRTHW目錄下, 內容如下

# cat   ruby/Lab-LRTHW/ex7.rb

puts "Mary had a little lamb."

#藉由 % 將 snow 帶入列印的顯示

puts "Its fleece was white as %s," % 'snow'

puts "And everywhere that Mary went."

# 使用 * 10 來列印 10次 .

puts "." * 10

end1 = "C"

end2 = "h"

end3 = "e"

end4 = "e"

end5 = "s"

end6 = "e"

end7 = "B"

end8 = "u"

end9 = "r"

end10 = "g"

end11 = "e"

end12 = "r"

#print 不像 puts 會執行換行, 然後使用 + 連接字串

print end1 + end2 + end3 + end4 + end5 + end6

print end7 + end8 + end9 + end10 + end11 + end12

puts

並使用 ruby 指令執行該程式

# ruby  ruby/Lab-LRTHW/ex7.rb

Mary had a little lamb.

Its fleece was white as snow,

And everywhere that Mary went.

..........

CheeseBurger

接下來練習 習題 8: 印出，印出

建立一個檔案 ex8.rb 於我們建立好的Lab-LRTHW目錄下, 內容如下

# cat  ruby/Lab-LRTHW/ex8.rb

#定義一個變數 formatter

formatter = "%s %s %s %s"

#帶入相關變數的值, 然後列印出來

puts formatter % [1, 2, 3, 4]

puts formatter % ["one", "two", "three", "four"]

#這邊因為沒有給值, 所以列印4次 %s %s %s %s

puts formatter % [formatter, formatter, formatter, formatter]

#也可以後來帶入值

puts formatter % [

"I had this thing.",

"That you could type up right.",

"But it didn't sing.",

"So I said goodnight."

]

並使用 ruby 指令執行該程式

# ruby   ruby/Lab-LRTHW/ex8.rb

1 2 3 4

one two three four

%s %s %s %s %s %s %s %s %s %s %s %s %s %s %s %s

I had this thing. That you could type up right. But it didn't sing. So I said goodnight.

接下來練習 習題 9: 印出，印出，印出

建立一個檔案 ex9.rb 於我們建立好的Lab-LRTHW目錄下, 內容如下

# cat   ruby/Lab-LRTHW/ex9.rb

# Here's some new strange stuff, remember type it exactly.

days = "Mon Tue Wed Thu Fri Sat Sun"

#這邊使用 \n 來進行換行

months = "Jan\nFed\nMar\nApr\nMay\nJun\nJul\nAug"

#puts 後面用接兩個物件, 使用逗號來區隔

puts "Here are days: ", days

puts "Here are the months: ", months

puts <<PARAGRAPH

There's something going on here.

With the three double-quotes.

We'll be able to type as much as we like.

Even 4 lines if we want, or 5 or 6.

PARAGRAPH

並使用 ruby 指令執行該程式

# ruby ruby/Lab-LRTHW/ex9.rb

Here are days:

Mon Tue Wed Thu Fri Sat Sun

Here are the months:

Jan

Fed

Mar

Apr

May

Jun

Jul

Aug

There's something going on here.

With the three double-quotes.

We'll be able to type as much as we like.

Even 4 lines if we want, or 5 or 6.

最後加入到 git  並傳送到 GitHub

# git  add  ruby/*

# git  commit  -m "Add ruby exercise file 7-9"

[master 670ee65] Add ruby exercise file 7-9

3 files changed, 57 insertions(+)

create mode 100644 ruby/Lab-LRTHW/ex7.rb

create mode 100644 ruby/Lab-LRTHW/ex8.rb

create mode 100644 ruby/Lab-LRTHW/ex9.rb

# git   push   origin master

Username for 'https://github.com': 您的帳號

Password for 'https://sakanamax@github.com': 您的密碼

Counting objects: 10, done.

Compressing objects: 100% (7/7), done.

Writing objects: 100% (7/7), 1.43 KiB, done.

Total 7 (delta 2), reused 0 (delta 0)

To https://github.com/sakanamax/2013ironman.git

  43d240c..670ee65  master -> master

Fun with Day 25 ~