Sha256: b12a0b339a6f0d138b2f59487898a6f5520fb8c3a2544ab76c989f279fda1415
Contents?: true
Size: 687 Bytes
Versions: 26
Compression:
Stored size: 687 Bytes
Contents
module Bmg
class Summarizer
#
# Collect the count of distinct values.
#
# Example:
#
# # direct ruby usage
# Bmg::Summarizer.distinct_count(:qty).summarize(...)
#
class DistinctCount < Summarizer
# Returns [] as least value.
def least()
{}
end
# Adds val to the memo array
def _happens(memo, val)
memo[val] = true
memo
end
def finalize(memo)
memo.keys.size
end
end # class DistinctCount
# Factors a distinct count summarizer
def self.distinct_count(*args, &bl)
DistinctCount.new(*args, &bl)
end
end # class Summarizer
end # module Bmg
Version data entries
26 entries across 26 versions & 1 rubygems