$ go get github.com/arr-ai/arrai/arrai
$ go install github.com/arr-ai/arrai/arrai
$ arrai -h

$ arrai eval '41 + 1'

$ echo {0..10} | arrai transform '2^.'

$ ln -s arrai "$GOPATH/bin/ax"
$ echo {0..10} | ax '2^.'

$ arrai serve --listen localhost

$ arrai observe localhost '$'

$ arrai update localhost '{a: {|1, 2, 3|}, b: "hello"}'