Baking with variadic functions

Now we can rework our bake-cake function to use the variadic versions of our add functions.

Exercise 12

Rewrite bake-cake to use the new add function.

Cake

2 cups flour
2 eggs
1 cup milk
1 cup sugar

mix all ingredients
bake in pan for 25 minutes

let cool

To navigate to this point in the introduction-to-clojure repo:

$CMD git checkout -f 1.15

Watch me

Here's the old version:

(defn bake-cake []
  (add-eggs 2)
  (add-flour-cups 2)
  (add-milk-cups 1)
  (add-sugar-cups 1)
  (mix)
  (pour-into-pan)
  (bake-pan 25)
  (cool-pan))

We can replace each of the calls to add- functions with add.

(defn bake-cake []
  (add :egg 2)
  (add :flour 2)
  (add :milk 1)
  (add :sugar 1)
  (mix)
  (pour-into-pan)
  (bake-pan 25)
  (cool-pan))

It's looking a lot like a recipe now.

Let's test it:

(start-over)
(bake-cake)

To navigate to this point in the introduction-to-clojure repo:

$CMD git checkout -f 1.16