Dan Rosen

Persistent, immutable collections; when to use Mutable collections; when to use

Port from @mergeconflict's LiveLessons

Need some content about what `Predef` is, and some useful things to be aware of in it.

Since everything sent to the interpreter is dealt with as a single expression, rather than parsed as multiple statements, we get funky-looking output. Especially when `println` is involved.

Refer to @mergeconflict's LiveLessons videos on how to approach currying.

See [consolation](https://github.com/mergeconflict/consolation). Should probably be two submodules: a Scala API and a Spray wrapper.