--- proc { ... }
--- lambda { ... }
--- proc
--- lambda

    Ϳ줿֥å³֥ (Proc Υ󥹥)
    ֤ޤ(Proc.newƱǤ)

    ֥åꤵʤСƤӽФΥ᥽åɤǻꤵ줿֥å
    ³֥ȤȤ֤ޤƤӽФΥ᥽åɤ֥åʤ
    ǸƤФ ArgumentError 㳰ȯޤ

