Hi Jan,

Many thanks for your answer.

For me it was a very frustating problem. I should reread the 
"Programming Ruby" and "The Well-Grounded Rubist" books.;-)

Anyhow, I solved the problem by refactoring  the code.

I  have introduced a Code class for the code-array and now I can put the 
code objects in the arr-array.

Greetings,

Thiel

Op 30-5-2012 15:44, Jan E. schreef:
> Hi,
>
> Variables are references in Ruby. When you assign the "code" array to
> the "arr" array, then "arr" will contain this exact array. Not some kind
> of "snapshot" of the "code" array at this point of time.
>
> So what you're actually doing is you assign the same array (referenced
> by "code") to the first and second index of "arr". If you want to have
> two independent arrays, you have to clone "code" first.
>