# Set implements a collection of unordered values with no duplicates.
# This is a hybrid of Array's intuitive inter-operation facilities and
# Hash's fast lookup.

Set ϽʣΤʤ֥ȤνŤƤʤޤμǤ
Arrayλı黻ǽHashΤ褦ʹ®ʸ碌ޤ

# The equality of each couple of elements is determined according to
# Object#eql? and Object#hash, since Set uses Hash as storage.

2ĤΥ֥Ȥ Object#eql?  Object#hash ˤޤ
ʤʤ顢Set  Hash 򵭲ȤƻȤäƤ뤫Ǥ