A way to reference last value in REPL

[gludit]

Often, usually when making remote requests or doing some other slow computations, I want to reference the value of last expression in the REPL that I forgot to create binding for. Ruby's irb supports _ on the right side of a bind to refer to last value (e.g. x = _, but also just typing _ + 1), while Elixir's iex uses a v/0 (invoked as just v) helper function.