Class: BioTable::Count::CountTracker
- Inherits:
-
Object
- Object
- BioTable::Count::CountTracker
- Defined in:
- lib/bio-table/count.rb
Overview
Track rows that have the same column items. Return the last match of the cummalative list with the count attached.
Instance Method Summary collapse
-
#add(row, type, flush: false) ⇒ Object
Add a row and if it differs send the last merged edition back type is :header or :row.
-
#initialize(list) ⇒ CountTracker
constructor
A new instance of CountTracker.
Constructor Details
#initialize(list) ⇒ CountTracker
Returns a new instance of CountTracker.
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# File 'lib/bio-table/count.rb', line 6 def initialize list @list = list.map { |item| item.to_i } @rows = [] end |
Instance Method Details
#add(row, type, flush: false) ⇒ Object
Add a row and if it differs send the last merged edition back type is :header or :row
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# 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 |