Υ顼ϤƤȤnumberޤlengthɬפȤƤ̿ФưͿʤäޤ
˺줿ΤƥȤ([])ץλȴְ㤨ƤޤäΤɤ餫Ǥ礦
ޤ\valueΤ褦̿length̿\protect֤ˤ⤳Υ顼ޤ
