Planning the Changes...

The changes the customer gave us changed the mental model we had been using. Instead of tying knots on a net, we are now placing colored tokens there. Mark and I decided to change the name of our methods to reflect the new scheme.

Here's our first pass ...

get(x,y) -- Get the current token at location (x,y).
set(x,y,token) -- Set the token at location (x,y) to be the value of token.

Token values can be ...

:BLACK -- Black token
:WHITE -- White token
:EMPTY -- No token

(see note on Ruby Symbols)

After some reflection, we decided we weren't happy with the get/set names. Since the net object was looking more and more like a two-dimensional array, we decided to drop the get/set methods and implement an array-like notation for the net object using Ruby Operators. Accessing the net might look like this ...

net[2,3] = :BLACK # Set location (2,3) to the Black token if net[1,4] == :EMPTY # Test if location (1,4) is empty do_something end

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