var id_s = map(function(e) { return  '#'+e.id }, Bacon.fromEventTarget(document, "click"))

var element_s = map(document.querySelector, id_s)

//=> EventStream(Element)

element_s.onValue(function(el) { alert('The inner html is ' +el.innerHTML) })

var makeHtml = function(post){ return "<div>"+post.title+"</div>"};

var page_f = map(makeHtml, http.get('/posts/2'))

page_f.fork(function(err) { throw(err) },

                function(page){ $('#container').html(page) })

console.clear();

var _ = R;

var P = PointFree;

var map = P.fmap;

var compose = P.compose;

var Maybe = P.Maybe;

var Identity = P.Id;

// Exercise 1

// ==========

// Use _.add(x,y) and map(f,x) to make a function that increments a value inside a functor

console.log("--------Start exercise 1--------")

var ex1 = map(_.add())

assertDeepEqual(Identity(), ex1(Identity()))

console.log("exercise 1...ok!")

// Exercise 2

// ==========

// Use _.head to get the first element of the list

var xs = Identity(['do', 'ray', 'me', 'fa', 'so', 'la', 'ti', 'do'])

console.log("--------Start exercise 2--------")

var ex2 = map(_.head);

assertDeepEqual(Identity('do'), ex2(xs))

console.log("exercise 2...ok!")

// Exercise 3

// ==========

// Use safeGet and _.head to find the first initial of the user

var safeGet = _.curry(function(x,o){ return Maybe(o[x]) })

var user = {id: , name: "Albert"}

console.log("--------Start exercise 3--------")

var ex3 = compose(map(_.head), safeGet('name'));

assertDeepEqual(Maybe('A'), ex3(user))

console.log("exercise 3...ok!")

// Exercise 4

// ==========

// Use Maybe to rewrite ex4 without an if statement

console.log("--------Start exercise 4--------")

var ex4 = function(n) {

  if(n){

    return parseInt(n);

  }

}

var ex4 = compose(map(parseInt),Maybe)

assertDeepEqual(Maybe(), ex4(""))

console.log("exercise 4...ok!")

// TEST HELPERS

// =====================

function inspectIt(x){

  return (x.inspect && x.inspect()) || (x.toString && x.toString()) || x.valueOf(); //hacky for teachy.

}

function assertEqual(x,y){

  if(x !== y){ throw("expected "+x+" to equal "+y); }

}

function assertDeepEqual(x,y){

  if(x.val !== y.val) throw("expected "+inspectIt(x)+" to equal "+inspectIt(y));

}