Changing the type of a variable

Then you may benefit great deal (and enjoy it, actually) from becoming
more comfortable with Ruby itself. Pickaxe (Programming Ruby, Second
edition) is you best friend here ;-).

Gennady.

···

Maybe, but as I said, I'm a newbie when it comes to ruby, and really,
from where I stand, this looks to be a ruby thing, not a Rails thing.
Does the Ruby VM remember the types of variables even across
sessions?
How do I start a VM session anyway? How can I reset the VM?

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