var foldl = function (f, acc, array) {
}

console.log(foldl(function(x,y){return x+y}, 0, [1,2,3]));

var foldr = function (f, z, array) {
}

console.log(foldl(function(x,y){return x/y}, 1, [2,4,8]));

var map = function (f, array) {
}

console.log(map(function(x){return x+x}, [1,2,3,5,7,9,11,13]));


// Write a curry function as we discussed in class.
// Create a `double` method using the curry function
// and the following `mult` function.
function mult(x,y) {
  return x * y;
}