Add kindergarten-garden exercise (#119)

* Add kindergarten-garden exercise

* Pattern matching on student

config.json

@@ -143,6 +143,14 @@
         "prerequisites": [],
         "difficulty": 2
       },
+      {
+        "slug": "kindergarten-garden",
+        "name": "Kindergarten Garden",
+        "uuid": "5c3e5171-d541-47fb-9cf3-a3965f5b3118",
+        "practices": [],
+        "prerequisites": [],
+        "difficulty": 2
+      },
       {
         "slug": "micro-blog",
         "name": "Micro Blog",

exercises/practice/kindergarten-garden/.docs/instructions.md

@@ -0,0 +1,56 @@
+# Instructions
+
+Your task is to, given a diagram, determine which plants each child in the kindergarten class is responsible for.
+
+There are 12 children in the class:
+
+- Alice, Bob, Charlie, David, Eve, Fred, Ginny, Harriet, Ileana, Joseph, Kincaid, and Larry.
+
+Four different types of seeds are planted:
+
+| Plant  | Diagram encoding |
+| ------ | ---------------- |
+| Grass  | G                |
+| Clover | C                |
+| Radish | R                |
+| Violet | V                |
+
+Each child gets four cups, two on each row:
+
+```text
+[window][window][window]
+........................ # each dot represents a cup
+........................
+```
+
+Their teacher assigns cups to the children alphabetically by their names, which means that Alice comes first and Larry comes last.
+
+Here is an example diagram representing Alice's plants:
+
+```text
+[window][window][window]
+VR......................
+RG......................
+```
+
+In the first row, nearest the windows, she has a violet and a radish.
+In the second row she has a radish and some grass.
+
+Your program will be given the plants from left-to-right starting with the row nearest the windows.
+From this, it should be able to determine which plants belong to each student.
+
+For example, if it's told that the garden looks like so:
+
+```text
+[window][window][window]
+VRCGVVRVCGGCCGVRGCVCGCGV
+VRCCCGCRRGVCGCRVVCVGCGCV
+```
+
+Then if asked for Alice's plants, it should provide:
+
+- Violets, radishes, violets, radishes
+
+While asking for Bob's plants would yield:
+
+- Clover, grass, clover, clover

exercises/practice/kindergarten-garden/.docs/introduction.md

@@ -0,0 +1,6 @@
+# Introduction
+
+The kindergarten class is learning about growing plants.
+The teacher thought it would be a good idea to give the class seeds to plant and grow in the dirt.
+To this end, the children have put little cups along the window sills and planted one type of plant in each cup.
+The children got to pick their favorites from four available types of seeds: grass, clover, radishes, and violets.

exercises/practice/kindergarten-garden/.meta/Example.roc

@@ -0,0 +1,39 @@
+module [plants]
+
+Student : [Alice, Bob, Charlie, David, Eve, Fred, Ginny, Harriet, Ileana, Joseph, Kincaid, Larry]
+Plant : [Grass, Clover, Radishes, Violets]
+
+studentIndex : Student -> U64
+studentIndex = \student ->
+    when student is
+        Alice -> 0
+        Bob -> 1
+        Charlie -> 2
+        David -> 3
+        Eve -> 4
+        Fred -> 5
+        Ginny -> 6
+        Harriet -> 7
+        Ileana -> 8
+        Joseph -> 9
+        Kincaid -> 10
+        Larry -> 11
+
+plants : Str, Student -> Result (List Plant) _
+plants = \diagram, student ->
+    startIndex = 2 * studentIndex student
+    grid =
+        diagram
+        |> Str.trim
+        |> Str.split "\n"
+        |> List.map \row ->
+            row |> Str.trim |> Str.toUtf8
+    [(0, 0), (0, 1), (1, 0), (1, 1)]
+        |> List.mapTry \(row, column) ->
+            plant = grid |> List.get? row |> List.get? (startIndex + column)
+            when plant is
+                'G' -> Ok Grass
+                'C' -> Ok Clover
+                'R' -> Ok Radishes
+                'V' -> Ok Violets
+                _ -> Err (UnknownPlant plant)

exercises/practice/kindergarten-garden/.meta/config.json

@@ -0,0 +1,19 @@
+{
+  "authors": [
+    "ageron"
+  ],
+  "files": {
+    "solution": [
+      "KindergartenGarden.roc"
+    ],
+    "test": [
+      "kindergarten-garden-test.roc"
+    ],
+    "example": [
+      ".meta/Example.roc"
+    ]
+  },
+  "blurb": "Given a diagram, determine which plants each child in the kindergarten class is responsible for.",
+  "source": "Exercise by the JumpstartLab team for students at The Turing School of Software and Design.",
+  "source_url": "https://turing.edu"
+}

exercises/practice/kindergarten-garden/.meta/template.j2

@@ -0,0 +1,30 @@
+{%- import "generator_macros.j2" as macros with context -%}
+{{ macros.canonical_ref() }}
+{{ macros.header() }}
+
+import {{ exercise | to_pascal }} exposing [plants]
+
+{% for supercase in cases %}
+###
+### {{ supercase["description"] }}
+###
+
+{% for case in supercase["cases"] -%}
+{%- if case["cases"] %}
+## {{ case["description"] }}
+{%- set subcases = case["cases"] %}
+{%- else %}
+{%- set subcases = [case] %}
+{%- endif %}
+
+{% for subcase in subcases -%}
+# {{ subcase["description"] }}
+expect
+    diagram = {{ subcase["input"]["diagram"] | to_roc_multiline_string | indent(8) }}
+    result = diagram |> {{ subcase["property"] | to_camel }} {{ subcase["input"]["student"] | to_pascal }}
+    result == Ok [{% for plant in subcase["expected"] %}{{ plant | to_pascal }}, {% endfor %}]
+
+{% endfor %}
+
+{% endfor %}
+{% endfor %}

exercises/practice/kindergarten-garden/.meta/tests.toml

@@ -0,0 +1,61 @@
+# This is an auto-generated file.
+#
+# Regenerating this file via `configlet sync` will:
+# - Recreate every `description` key/value pair
+# - Recreate every `reimplements` key/value pair, where they exist in problem-specifications
+# - Remove any `include = true` key/value pair (an omitted `include` key implies inclusion)
+# - Preserve any other key/value pair
+#
+# As user-added comments (using the # character) will be removed when this file
+# is regenerated, comments can be added via a `comment` key.
+
+[1fc316ed-17ab-4fba-88ef-3ae78296b692]
+description = "partial garden -> garden with single student"
+
+[acd19dc1-2200-4317-bc2a-08f021276b40]
+description = "partial garden -> different garden with single student"
+
+[c376fcc8-349c-446c-94b0-903947315757]
+description = "partial garden -> garden with two students"
+
+[2d620f45-9617-4924-9d27-751c80d17db9]
+description = "partial garden -> multiple students for the same garden with three students -> second student's garden"
+
+[57712331-4896-4364-89f8-576421d69c44]
+description = "partial garden -> multiple students for the same garden with three students -> third student's garden"
+
+[149b4290-58e1-40f2-8ae4-8b87c46e765b]
+description = "full garden -> for Alice, first student's garden"
+
+[ba25dbbc-10bd-4a37-b18e-f89ecd098a5e]
+description = "full garden -> for Bob, second student's garden"
+
+[566b621b-f18e-4c5f-873e-be30544b838c]
+description = "full garden -> for Charlie"
+
+[3ad3df57-dd98-46fc-9269-1877abf612aa]
+description = "full garden -> for David"
+
+[0f0a55d1-9710-46ed-a0eb-399ba8c72db2]
+description = "full garden -> for Eve"
+
+[a7e80c90-b140-4ea1-aee3-f4625365c9a4]
+description = "full garden -> for Fred"
+
+[9d94b273-2933-471b-86e8-dba68694c615]
+description = "full garden -> for Ginny"
+
+[f55bc6c2-ade8-4844-87c4-87196f1b7258]
+description = "full garden -> for Harriet"
+
+[759070a3-1bb1-4dd4-be2c-7cce1d7679ae]
+description = "full garden -> for Ileana"
+
+[78578123-2755-4d4a-9c7d-e985b8dda1c6]
+description = "full garden -> for Joseph"
+
+[6bb66df7-f433-41ab-aec2-3ead6e99f65b]
+description = "full garden -> for Kincaid, second to last student's garden"
+
+[d7edec11-6488-418a-94e6-ed509e0fa7eb]
+description = "full garden -> for Larry, last student's garden"

exercises/practice/kindergarten-garden/KindergartenGarden.roc

@@ -0,0 +1,8 @@
+module [plants]
+
+Student : [Alice, Bob, Charlie, David, Eve, Fred, Ginny, Harriet, Ileana, Joseph, Kincaid, Larry]
+Plant : [Grass, Clover, Radishes, Violets]
+
+plants : Str, Student -> Result (List Plant) _
+plants = \diagram, student ->
+    crash "Please implement the 'plants' function"