What is in $b? Where is $CMB? Why do you expect the value stored in a hash to change once it's been set? Why are you not rolling the die each time the user inputs a request?
If the computer were a person, here is what that person is doing currently:
- Roll a die, and write down the result.
- Roll another, and write down the result.
- Roll again and write down the result.
- Read the first result and write it again into a little book of indexes and corresponding values.
- Read the second result and write it again into a little book of indexes and corresponding values.
- Read the third result and write it again into a little book of indexes and corresponding values.
- Repeatedly ask someone what they would like to know.
- Look in your little index book and find the answer that was written down for the question that was asked.
- Read back to the user the answer that you wrote in your little book.
- Wonder why the answer written in the little book hasn't been magically erased and re-written without your intervention.
In real life, as a person, you would roll the dice each time someone requests a roll. In your program, you roll just one time and store the result. I don't think that caching a die roll is the right approach.
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