Sha256: 51be79442f7f1afdbd18446a68b23c81bd834321442dbf6965732bfe80da1447
Contents?: true
Size: 652 Bytes
Versions: 5
Compression:
Stored size: 652 Bytes
Contents
module Alf
module Engine
class Ungroup < Cog
# @return [Enumerable] The operand
attr_reader :operand
# @return [AttrName] Relation-valued attribute to ungroup
attr_reader :attribute
# Creates a Ungroup instance
def initialize(operand, attribute)
@operand = operand
@attribute = attribute
end
# (see Cog#each)
def each
operand.each do |tuple|
tuple = tuple.dup
tuple.delete(@attribute).each do |subtuple|
yield tuple.merge(subtuple)
end
end
end
end # class Ungroup
end # module Engine
end # module Alf
Version data entries
5 entries across 5 versions & 1 rubygems