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【Ruby】trimしたいときはstripしよう

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##strip
Rubyにはtrimメソッドがないので代わりにstripメソッドを使う。

文字列先頭末尾の空白文字を全て取り除いた文字列を生成して返す。
空白文字の定義は" \t\r\n\f\v"
文字列右側からは"\0"も取り除くが、左側の"\0"は取り除かない。

pry(main)> p "   s".strip
=> "s"
# 文字と文字の間の空文字は取り除かない
pry(main)> p "   s  f  ".strip
=> "s  f"
pry(main)> p "   s  f\n".strip
=> "s  f"
pry(main)> p "\0  s  f\0".strip
=> "\u0000  s  f"

##参考

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