add hints, prerequisites

config.json

@@ -167,7 +167,7 @@
         "name": "Card Games",
         "uuid": "01a06d2b-ffb1-4497-9bb3-d93ee2d0931b",
         "concepts": ["lists"],
-        "prerequisites": ["basics"],
+        "prerequisites": ["basics", "conditionals", "booleans"],
         "status": "wip"
       }
     ],

exercises/concept/card-games/.docs/hints.md

@@ -0,0 +1,56 @@
+# Hints
+
+## Tracking Poker Rounds
+
+- The [`list`][list] function returns a list consisting of the arguments it is passed.
+
+## Keeping all Rounds in the Same Place
+
+- The [`concat`][concat] function can be used to concatenate two lists together.
+
+## Finding Prior Rounds
+
+- The [`some`][some] function will return the first logically true value in a collection.
+- [`boolean`][boolean] is useful in cases where a function returns a value but the tests are expecting a boolean.
+
+## Averaging Card Values
+
+- Recall basic arithmetic operators such as [`/`][division] and [`+`][addition].
+- A collection of numbers can be summed using either [`apply`][apply] or [`reduce`][reduce].
+- The [`count`][count] function returns the number of items in a collection.
+- The `/` function returns a ratio type when operating on integers. You can use [`double`][double] to convert a ratio to a decimal.
+
+## Alternate Averages
+
+- There are sequence functions to return the [`first`][first] or [`last`] element of a sequential collection.
+- To find the middle card you can divide the number of cards by 2, round to the lowest integer with [`int`][int], and retrieve the card at that index using [`nth`][nth].
+- Use [`or`][or] to determine if either condition is true.
+
+## More Averaging Techniques
+
+- One way of retrieving the cards at even/odd indices would be to [`map`][map] a function using [`nth`][nth] over a [`range`][range], which takes an optional `step` argument.
+
+## Bonus Round Rules
+
+- Recall how to use [`if`][if] from the exercise on conditionals.
+- You can return all items of a collection except for the last one using [`butlast`][butlast].
+
+[addition]: https://clojuredocs.org/clojure.core/+
+[apply]: https://clojuredocs.org/clojure.core/apply
+[boolean]: https://clojuredocs.org/clojure.core/boolean
+[butlast]: https://clojuredocs.org/clojure.core/butlast
+[concat]: https://clojuredocs.org/clojure.core/concat
+[count]: https://clojuredocs.org/clojure.core/count
+[division]: https://clojuredocs.org/clojure.core/_fs
+[double]: https://clojuredocs.org/clojure.core/double
+[first]: https://clojuredocs.org/clojure.core/first
+[if]: https://clojuredocs.org/clojure.core/if
+[int]: https://clojuredocs.org/clojure.core/int
+[last]: https://clojuredocs.org/clojure.core/last
+[list]: https://clojuredocs.org/clojure.core/list
+[map]: https://clojuredocs.org/clojure.core/map
+[nth]: https://clojuredocs.org/clojure.core/nth
+[or]: https://clojuredocs.org/clojure.core/or
+[range]: https://clojuredocs.org/clojure.core/range
+[reduce]: https://clojuredocs.org/clojure.core/reduce
+[some]: https://clojuredocs.org/clojure.core/some