REPL for Node that automatically saves code and state.
The REPL has two different things going on:
- Context; that's just what I call it...its the code you type in at the prompt
- State; an object behind the scenes with stuff in it that you can access from the REPL
_ is, by default, assigned the result of the most recently evaluated expressions
_error ~ ditto
ctrl + R searches backwards
ctrl + S searches forwards