Sha256: e2807d1f642e2d29daf719aafdcadbc40cb8ba09bd392f0b7a7d95fd5c6fee27
Contents?: true
Size: 707 Bytes
Versions: 25
Compression:
Stored size: 707 Bytes
Contents
module Bmg
class Summarizer
# See First and Last
class Positional < Summarizer
def initialize(*args, &block)
super
raise ArgumentError, "Missing order" unless options[:order]
@ordering = Ordering.new(options[:order])
end
attr_reader :ordering
def least
nil
end
def happens(memo, tuple)
if memo.nil?
tuple
else
c = ordering.call(memo, tuple)
c <= 0 ? choose(memo, tuple) : choose(tuple, memo)
end
end
def finalize(memo)
return nil if memo.nil?
extract_value(memo)
end
end # class Positional
end # class Summarizer
end # module Bmg
Version data entries
25 entries across 25 versions & 1 rubygems