class BioTable::Count::CountTracker
Track rows that have the same column items. Return the last match of the cummalative list with the count attached.
Public Class Methods
new(list)
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# File lib/bio-table/count.rb, line 6 def initialize list @list = list.map { |item| item.to_i } @rows = [] end
Public Instance Methods
add(row, type, flush: false)
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Add a row and if it differs send the last merged edition back type is :header or :row
# File lib/bio-table/count.rb, line 13 def add row, type, flush: false return row+["count"] if type == :header num = @rows.size prev = @rows.last if flush prev+[num] else # Take the list and compare each item to the previous row prev_same = if prev @list.reduce(true) { |memo,i| memo && (row[i]==prev[i]) } else false end if prev_same @rows << row else @rows = [] @rows << row return prev+[num] if prev end nil end end