Hi, I’m new to Ruby and have done some reading on it. To learn more
about it I’m attempting to re-write some of my Java code. However I
have run into a problem with Modules/Mixins that I can’t seem to solve.
My problem is like this; I have a module with the instance method
validIndex? (and some constants) which is included into my other
classes; Board, Strategy and Player.
MAX_ENTRIES = 19682
if index >= 0 && index <= MAX_ENTRIES then
Each Player has two Strategies and Boards represent these. When
creating a Board instance I can use validIndex?, however when creating
a Strategy or Player (which creates new Boards) I get:
NoMethodError: undefined method
validIndex?' for Board:Class from /Users/jon_r/Projects/RbNoughtsCrosses/Board.rb:31:innumToBoard’
initialize' from /Users/jon_r/Projects/RbNoughtsCrosses/Strategy.rb:12:ineach’
initialize' from /Users/jon_r/Projects/RbNoughtsCrosses/Player.rb:15:innew’
initialize' from (irb):5:innew’
But when I check each classes instance methods I see validIndex?
listed. I’m confused, as in my eyes, it’s similar to the who_am_i?
example given in the book. However there is still a lot for me to
learn. Does anybody recognise this situation, or where I’m going wrong?
I’m sorry if it’s stupid but I have tried to find solutions from other