# Ruby入門＞ Arrayクラス（配列）

配列の集合としての操作

ary = %w|A, B, C, D, E|
p ary.values_at(1, 4, 0)    # とびとびに参照
 
ary1 = ["a", "b", "c", "d"]
ary2 = ["c", "d", "e", "f"]
 
puts "--- 配列の共通集合 ---"
p(ary1 & ary2)
p(ary2 & ary1)
puts "--- 配列の和集合 ---"
p(ary1 | ary2)
p(ary2 | ary1)
puts "--- 配列の差 ---"
p(ary1 - ary2)
p(ary2 - ary1)
puts "--- 配列の結合 ---"
p(ary1 + ary2)
p(ary2 + ary1)

実行結果。

["B,", "E", "A,"]
--- 配列の共通集合 ---
["c", "d"]
["c", "d"]
--- 配列の和集合 ---
["a", "b", "c", "d", "e", "f"]
["c", "d", "e", "f", "a", "b"]
--- 配列の差 ---
["a", "b"]
["e", "f"]
--- 配列の結合 ---
["a", "b", "c", "d", "c", "d", "e", "f"]
["c", "d", "e", "f", "a", "b", "c", "d"]

>> 次の記事 : 配列に要素を追加するメソッド

<< 前の記事 : 配列を操作する／要素の変更・追加・要素へのアクセス