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[Ruby] Stringクラスのinclude?メソッド

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学習したことのアウトプットとして

include?メソッド

Rubyの組み込みライブラリ
指定した値が含まれているかを判定するメソッド
指定した値が含まれている場合はtrueを、含まれていない場合はfalseを返り値として返す

Arrayのinclude?メソッドを使用する場合

指定した値が、配列中に含まれているかを判定する

a = [ "a", "b", "c" ]
a.include?("b")       #=> true
a.include?("z")       #=> false

Stringのinclude?メソッドを使用する場合

文字列中に部分文字列が含まれていれば真を返す

"hello".include? "lo"   #=> true
"hello".include? "ol"   #=> false
"hello".include? ?h     #=> true

※補足等がありましたらコメントいただけると幸いです

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