Method: RubyXL::Parser.convert_to_index

Defined in:
lib/rubyXL/parser.rb

.convert_to_index(cell_string) ⇒ Object

converts cell string (such as “AA1”) to matrix indices



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# File 'lib/rubyXL/parser.rb', line 12

def Parser.convert_to_index(cell_string)
  index = Array.new(2)
  index[0]=-1
  index[1]=-1
  if(cell_string =~ /^([A-Z]+)(\d+)$/)
    one = $1.to_s
    row = Integer($2) - 1 #-1 for 0 indexing
    col = 0
    i = 0
    one = one.reverse #because of 26^i calculation
    one.each_byte do |c|
      int_val = c - 64 #converts A to 1
      col += int_val * 26**(i)
      i=i+1
    end
    col -= 1 #zer0 index
    index[0] = row
    index[1] = col
  end
  return index
end