delete_if()
public
Calls the given block once for each
key, value pair in the database. Deletes all entries for
which the block returns true.
Returns self.
Show source
def delete_if
del_keys = keys.dup
del_keys.delete_if { |k| yield( k, fetch( k ) ) == false }
del_keys.each { |k| delete( k ) }
self
end