Module: Janeway::AST::Helpers

Defined in:
lib/janeway/ast/helpers.rb

Overview

Helper methods for AST Expressions.

Class Method Summary collapse

Class Method Details

.camelcase_to_underscore(str) ⇒ String

Returns lowercase, with underscores.

Parameters:

  • str (String) —

    ascii string, CamelCase

Returns:

  • (String) —

    lowercase, with underscores



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# File 'lib/janeway/ast/helpers.rb', line 9

def self.camelcase_to_underscore(str)
  found_uppercase = false
  chars = []
  str.each_char do |char|
    if char.ord.between?(65, 90) # ascii 'A'..'Z' inclusive
      chars << '_'
      chars << (char.ord + 32).chr
      found_uppercase = true
    else
      chars << char
    end
  end
  return str unless found_uppercase

  chars.shift if chars.first == '_'
  chars.join
end