Ruby - Documentation Read the Manual(Array, instance methods)

Head First Ruby

開発環境

• OS X El Capitan - Apple (OS)
• Emacs (Text Editor)
• Ruby 2.3 (プログラミング言語)

Head First Ruby (Jay McGavren (著)、O'Reilly Media)のChapter 11.(Documentation Read the Manual)、How the Comparable methods work、POOL PUZZLE(No. 5804)を取り組んでみる。

POOL PUZZLE(No. 5804)

コード(Emacs)

#!/usr/bin/env ruby2.3
# -*- coding: utf-8 -*-

array = [10, 5, 7, 3, 9]

first = array.shift
puts "We pulled #{first} off the start of the array."

last = array.pop
puts "We pulled #{last} off the end of the array."

largest = array.max
puts "The largest remaining number is #{largest}."

入出力結果(Terminal)

$ ./sample1.rb
We pulled 10 off the start of the array.
We pulled 9 off the end of the array.
The largest remaining number is 7.
$