Class: Saxlsx::ColumnNameGenerator

Inherits:
Object
  • Object
show all
Defined in:
lib/saxlsx/column_name_generator.rb

Constant Summary collapse

FIRST = 
'A'
LAST = 
'Z'

Class Method Summary collapse

Class Method Details

.next_to(previous) ⇒ Object 



7
8
9
10
11
12
13
14
15
16
 
# File 'lib/saxlsx/column_name_generator.rb', line 7

def self.next_to(previous)
  char = previous ? previous[-1] : nil
  if char.nil?
    FIRST
  elsif char < LAST
    previous[0..-2] + char.next
  else
    next_to(previous[0..-2]) + FIRST
  end
end