type=class
superclass=IndexError
included=
extended=
library=_builtin

[[m:Hash#fetch]] ʤɤ key б value ʤȯޤ

Ruby 1.8 ǤƱͤξ̤ [[c:IndexError]] ȯƤޤ
ߴΤᡢ[[c:KeyError]]  [[c:IndexError]] Υ֥饹ˤʤäƤޤ
