Sha256: 72b68b2278f043dc6d83a09bcd95a9d99189a2d0db1dedc12a3670f029b4318c
Contents?: true
Size: 691 Bytes
Versions: 21
Compression:
Stored size: 691 Bytes
Contents
module Bmg
class Summarizer
#
# Average summarizer.
#
# Example:
#
# # direct ruby usage
# Bmg::Summarizer.avg(:qty).summarize(...)
#
class Avg < Summarizer
# Returns [0.0, 0.0] as least value.
def least()
[0.0, 0.0]
end
# Collects one more value + the sum of all
def _happens(memo, val)
[memo.first + val, memo.last + 1]
end
# Finalizes the computation.
def finalize(memo)
memo.first / memo.last
end
end # class Avg
# Factors an average summarizer
def self.avg(*args, &bl)
Avg.new(*args, &bl)
end
end # class Summarizer
end # module Bmg
Version data entries
21 entries across 21 versions & 1 rubygems