--- hash

    ֥ȤΥϥå֤ͤޤHash 饹
    ֥ȤǼΤѤƤޤA.eql?(B) 
    Ωɬ A.hash == B.hash Ωʤ
    ޤeql?ˤɬ碌
    Ƥ

    ǥեȤǤϡObject#id [Object/id] ƱͤϥåͤȤ
    ޤFixnum, Symbol, String ȹ
    ߤΥϥåؿѤޤ(Ѥ뤳ȤϤǤޤ)

    hash ϡͤʬۤǤդ֤褦ˤޤ
    (ߤμǤϡͤɽ 65439 (1.7 ʤ 536870917)
    ǳä;ϥåͤȤޤ

