Sha256: d973a7dcaba66d222cfa1b66e2be00cce08d9c83893f140584cf6c3ef451a053
Contents?: true
Size: 1008 Bytes
Versions: 10
Compression:
Stored size: 1008 Bytes
Contents
class Hash
# Modifies the receiving Hash so that the value previously referred to by
# _oldkey_ is also referenced by _newkey_; _oldkey_ is retained in the Hash.
# If _oldkey_ does not exist as a key in the Hash, no change is effected.
#
# Returns a reference to the Hash.
#
# foo = { :name=>'Gavin', 'wife'=>:Lisa }
# foo.alias!('name',:name) #=> { :name=>'Gavin', 'name'=>'Gavin', 'wife'=>:Lisa }
#
# foo = { :name=>'Gavin', 'wife'=>:Lisa }
# foo.alias!('spouse','wife') #=> { :name=>'Gavin', 'wife'=>:Lisa, 'spouse'=>:Lisa }
#
# foo = { :name=>'Gavin', 'wife'=>:Lisa }
# foo.alias!('bar','foo') #=> { :name=>'Gavin', 'wife'=>:Lisa }
#
# Note that if the _oldkey_ is reassigned, the reference will no longer exist,
# and the _newkey_ will remain as it was.
#
# CREDIT: Gavin Sinclair
#
# TODO: Rename to #aliaskey or something else.
def alias!(newkey, oldkey)
self[newkey] = self[oldkey] if self.has_key?(oldkey)
self
end
end
Version data entries
10 entries across 9 versions & 2 rubygems