Class: Bmg::Summarizer::Sum

Inherits:

Bmg::Summarizer

• Object
• Bmg::Summarizer
• Bmg::Summarizer::Sum

Defined in:

lib/bmg/summarizer/sum.rb

Overview

Sum summarizer.

Example:

# direct ruby usage
Bmg::Summarizer.sum(:qty).summarize(...)

Instance Attribute Summary

Attributes inherited from Bmg::Summarizer

#functor, #options

Instance Method Summary

• #_happens(memo, val) ⇒ Object

  Keep memo+val as new value.

• #least ⇒ Object

  Returns 0 as least value.

Methods inherited from Bmg::Summarizer

avg, by_proc, collect, concat, count, distinct, #finalize, #happens, #initialize, max, min, multiple, percentile, stddev, sum, summarization, #summarize, #to_summarizer_name, variance

Constructor Details

This class inherits a constructor from Bmg::Summarizer

Instance Method Details

#_happens(memo, val) ⇒ Object

Keep memo+val as new value

# File 'lib/bmg/summarizer/sum.rb', line 19

def _happens(memo, val) 
  memo + (val.nil? ? 0 : val)
end

#least ⇒ Object

Returns 0 as least value.

# File 'lib/bmg/summarizer/sum.rb', line 14

def least()
  0
end