do-you-see.js

// writing a function that does effectively _.pluck is a pain
// I don't like the function  return noise
var isOnline = map(status, function (x) { return x.online })

// one alternative is to use a function prop, which is higher
// order and returns a function that returns that property
var isOnline = map(status, prop("online"))

// another option is making it easier to write single
// expression functions. Thus avoiding the need for a bunch
// of higher order functions like https://github.com/gozala/oops
var isOnline = map(status, λ("x.online"))