Remove/Redefine types in REPL without restart

[blinkdog]

I'd like to request a command to delete and/or redefine a type inside the Julia REPL without restarting the REPL.

The command need not be available for all types provided by Julia. I'd be happy with just the ability to delete and/or redefine the types defined by the user during the REPL session.

[timholy]

It's not exactly what you're asking, but do you know about http://docs.julialang.org/en/latest/manual/faq/#how-can-i-modify-the-declaration-of-a-type-immutable-in-my-session ?

[JeffBezanson]

dup of #2385