feat: add dnd-character exercise (#86)

config.json

@@ -266,6 +266,14 @@
         "prerequisites": [],
         "difficulty": 4
       },
+      {
+        "slug": "dnd-character",
+        "name": "D&D Character",
+        "uuid": "3f9853c5-7a2c-4687-bc41-2017f5ebee44",
+        "practices": [],
+        "prerequisites": [],
+        "difficulty": 4
+      },
       {
         "slug": "high-scores",
         "name": "High Scores",

exercises/practice/dnd-character/.docs/instructions.md

@@ -0,0 +1,32 @@
+# Instructions
+
+For a game of [Dungeons & Dragons][dnd], each player starts by generating a character they can play with.
+This character has, among other things, six abilities; strength, dexterity, constitution, intelligence, wisdom and charisma.
+These six abilities have scores that are determined randomly.
+You do this by rolling four 6-sided dice and recording the sum of the largest three dice.
+You do this six times, once for each ability.
+
+Your character's initial hitpoints are 10 + your character's constitution modifier.
+You find your character's constitution modifier by subtracting 10 from your character's constitution, divide by 2 and round down.
+
+Write a random character generator that follows the above rules.
+
+For example, the six throws of four dice may look like:
+
+- 5, 3, 1, 6: You discard the 1 and sum 5 + 3 + 6 = 14, which you assign to strength.
+- 3, 2, 5, 3: You discard the 2 and sum 3 + 5 + 3 = 11, which you assign to dexterity.
+- 1, 1, 1, 1: You discard the 1 and sum 1 + 1 + 1 = 3, which you assign to constitution.
+- 2, 1, 6, 6: You discard the 1 and sum 2 + 6 + 6 = 14, which you assign to intelligence.
+- 3, 5, 3, 4: You discard the 3 and sum 5 + 3 + 4 = 12, which you assign to wisdom.
+- 6, 6, 6, 6: You discard the 6 and sum 6 + 6 + 6 = 18, which you assign to charisma.
+
+Because constitution is 3, the constitution modifier is -4 and the hitpoints are 6.
+
+~~~~exercism/note
+Most programming languages feature (pseudo-)random generators, but few programming languages are designed to roll dice.
+One such language is [Troll][troll].
+
+[troll]: https://di.ku.dk/Ansatte/?pure=da%2Fpublications%2Ftroll-a-language-for-specifying-dicerolls(84a45ff0-068b-11df-825d-000ea68e967b)%2Fexport.html
+~~~~
+
+[dnd]: https://en.wikipedia.org/wiki/Dungeons_%26_Dragons

exercises/practice/dnd-character/.docs/introduction.md

@@ -0,0 +1,10 @@
+# Introduction
+
+After weeks of anticipation, you and your friends get together for your very first game of [Dungeons & Dragons][dnd] (D&D).
+Since this is the first session of the game, each player has to generate a character to play with.
+The character's abilities are determined by rolling 6-sided dice, but where _are_ the dice?
+With a shock, you realize that your friends are waiting for _you_ to produce the dice; after all it was your idea to play D&D!
+Panicking, you realize you forgot to bring the dice, which would mean no D&D game.
+As you have some basic coding skills, you quickly come up with a solution: you'll write a program to simulate dice rolls.
+
+[dnd]: https://en.wikipedia.org/wiki/Dungeons_%26_Dragons

exercises/practice/dnd-character/.meta/config.json

@@ -0,0 +1,19 @@
+{
+  "authors": [
+    "vaeng"
+  ],
+  "files": {
+    "solution": [
+      "dnd-character.ua"
+    ],
+    "test": [
+      "tests.ua"
+    ],
+    "example": [
+      ".meta/example.ua"
+    ]
+  },
+  "blurb": "Randomly generate Dungeons & Dragons characters.",
+  "source": "Simon Shine, Erik Schierboom",
+  "source_url": "https://github.com/exercism/problem-specifications/issues/616#issuecomment-437358945"
+}

exercises/practice/dnd-character/.meta/example.ua

@@ -0,0 +1,10 @@
+Modifier     ← ⌊÷2-10
+Ability      ← (/+⊏↙3⊸⍖+1⌊×6 [⍥⚂] 4)
+Character    ← (∵⋅Ability ⇡6)
+Strength     ← °□⊡0
+Dexterity    ← °□⊡1
+Constitution ← °□⊡2
+Intelligence ← °□⊡3
+Wisdom       ← °□⊡4
+Charisma     ← °□⊡5
+Hitpoints    ← +10 Modifier ⊃Constitution

exercises/practice/dnd-character/.meta/tests.toml

@@ -0,0 +1,72 @@
+# 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.
+
+[1e9ae1dc-35bd-43ba-aa08-e4b94c20fa37]
+description = "ability modifier -> ability modifier for score 3 is -4"
+
+[cc9bb24e-56b8-4e9e-989d-a0d1a29ebb9c]
+description = "ability modifier -> ability modifier for score 4 is -3"
+
+[5b519fcd-6946-41ee-91fe-34b4f9808326]
+description = "ability modifier -> ability modifier for score 5 is -3"
+
+[dc2913bd-6d7a-402e-b1e2-6d568b1cbe21]
+description = "ability modifier -> ability modifier for score 6 is -2"
+
+[099440f5-0d66-4b1a-8a10-8f3a03cc499f]
+description = "ability modifier -> ability modifier for score 7 is -2"
+
+[cfda6e5c-3489-42f0-b22b-4acb47084df0]
+description = "ability modifier -> ability modifier for score 8 is -1"
+
+[c70f0507-fa7e-4228-8463-858bfbba1754]
+description = "ability modifier -> ability modifier for score 9 is -1"
+
+[6f4e6c88-1cd9-46a0-92b8-db4a99b372f7]
+description = "ability modifier -> ability modifier for score 10 is 0"
+
+[e00d9e5c-63c8-413f-879d-cd9be9697097]
+description = "ability modifier -> ability modifier for score 11 is 0"
+
+[eea06f3c-8de0-45e7-9d9d-b8cab4179715]
+description = "ability modifier -> ability modifier for score 12 is +1"
+
+[9c51f6be-db72-4af7-92ac-b293a02c0dcd]
+description = "ability modifier -> ability modifier for score 13 is +1"
+
+[94053a5d-53b6-4efc-b669-a8b5098f7762]
+description = "ability modifier -> ability modifier for score 14 is +2"
+
+[8c33e7ca-3f9f-4820-8ab3-65f2c9e2f0e2]
+description = "ability modifier -> ability modifier for score 15 is +2"
+
+[c3ec871e-1791-44d0-b3cc-77e5fb4cd33d]
+description = "ability modifier -> ability modifier for score 16 is +3"
+
+[3d053cee-2888-4616-b9fd-602a3b1efff4]
+description = "ability modifier -> ability modifier for score 17 is +3"
+
+[bafd997a-e852-4e56-9f65-14b60261faee]
+description = "ability modifier -> ability modifier for score 18 is +4"
+
+[4f28f19c-2e47-4453-a46a-c0d365259c14]
+description = "random ability is within range"
+
+[385d7e72-864f-4e88-8279-81a7d75b04ad]
+description = "random character is valid"
+
+[2ca77b9b-c099-46c3-a02c-0d0f68ffa0fe]
+description = "each ability is only calculated once"
+include = false
+
+[dca2b2ec-f729-4551-84b9-078876bb4808]
+description = "each ability is only calculated once"
+reimplements = "2ca77b9b-c099-46c3-a02c-0d0f68ffa0fe"

exercises/practice/dnd-character/dnd-character.ua

@@ -0,0 +1,39 @@
+# Calculate the modifier of an Ability score
+# ModifierValue ? Score
+Modifier     ← |1 ⊙(⍤ "Please implement Modifier" 0)
+
+# Generate a random Ability score
+# Score ? 
+Ability      ← |0.1 (⍤. "Please implement Ability" 0)
+
+# Generate a random character
+# Character ? 
+Character    ← |0.1 (⍤. "Please implement Character" 0)
+
+# Retrieve the Strength score of a Character
+# AbilityValue ? Character
+Strength     ← |1 ⊙(⍤ "Please implement Strength" 0)
+
+# Retrieve the Dexterity score of a Character
+# AbilityValue ? Character
+Dexterity    ← |1 ⊙(⍤ "Please implement Dexterity" 0)
+
+# Retrieve the Constitution score of a Character
+# AbilityValue ? Character
+Constitution ← |1 ⊙(⍤ "Please implement Constitution" 0)
+
+# Retrieve the Intelligence score of a Character
+# AbilityValue ? Character
+Intelligence ← |1 ⊙(⍤ "Please implement Intelligence" 0)
+
+# Retrieve the Wisdom score of a Character
+# AbilityValue ? Character
+Wisdom       ← |1 ⊙(⍤ "Please implement Wisdom" 0)
+
+# Retrieve the Charisma score of a Character
+# AbilityValue ? Character
+Charisma     ← |1 ⊙(⍤ "Please implement Charisma" 0)
+
+# Retrieve the Hitpoints score of a Character
+# AbilityValue ? Character
+Hitpoints    ← |1 ⊙(⍤ "Please implement Hitpoints" 0)

exercises/practice/dnd-character/tests.ua

@@ -0,0 +1,84 @@
+~ "dnd-character.ua" ~ Ability Character Charisma Constitution Dexterity Hitpoints Intelligence Modifier Modifier Strength Wisdom
+
+# ability modifier for score 3 is -4
+⍤⤙= ¯4 Modifier 3
+
+# ability modifier for score 4 is -3
+⍤⤙= ¯3 Modifier 4
+
+# ability modifier for score 5 is -3
+⍤⤙= ¯3 Modifier 5
+
+# ability modifier for score 6 is -2
+⍤⤙= ¯2 Modifier 6
+
+# ability modifier for score 7 is -2
+⍤⤙= ¯2 Modifier 7
+
+# ability modifier for score 8 is -1
+⍤⤙= ¯1 Modifier 8
+
+# ability modifier for score 9 is -1
+⍤⤙= ¯1 Modifier 9
+
+# ability modifier for score 10 is 0
+⍤⤙= 0 Modifier 10
+
+# ability modifier for score 11 is 0
+⍤⤙= 0 Modifier 11
+
+# ability modifier for score 12 is +1
+⍤⤙= 1 Modifier 12
+
+# ability modifier for score 13 is +1
+⍤⤙= 1 Modifier 13
+
+# ability modifier for score 14 is +2
+⍤⤙= 2 Modifier 14
+
+# ability modifier for score 15 is +2
+⍤⤙= 2 Modifier 15
+
+# ability modifier for score 16 is +3
+⍤⤙= 3 Modifier 16
+
+# ability modifier for score 17 is +3
+⍤⤙= 3 Modifier 17
+
+# ability modifier for score 18 is +4
+⍤⤙= 4 Modifier 18
+
+# random ability is within range
+⍤⤙×≥3:⊸≤18 Ability
+
+# random character is valid
+SomeCharacter ← Character
+⍤⤙×≥3:⊸≤18 Strength SomeCharacter
+⍤⤙×≥3:⊸≤18 Dexterity SomeCharacter
+⍤⤙×≥3:⊸≤18 Constitution SomeCharacter
+⍤⤙×≥3:⊸≤18 Intelligence SomeCharacter
+⍤⤙×≥3:⊸≤18 Wisdom SomeCharacter
+⍤⤙×≥3:⊸≤18 Charisma SomeCharacter
+⍤⤙×≥3:⊸≤18 Strength SomeCharacter
+⍤⤙= +10 Modifier Constitution ⟜Hitpoints SomeCharacter
+
+# Expected values were changed to cover all character abilities"
+AnotherCharacter ← Character
+⍤⤙= Strength ⟜Strength AnotherCharacter
+⍤⤙= Dexterity ⟜Dexterity AnotherCharacter
+⍤⤙= Constitution ⟜Constitution AnotherCharacter
+⍤⤙= Intelligence ⟜Intelligence AnotherCharacter
+⍤⤙= Wisdom ⟜Wisdom AnotherCharacter
+⍤⤙= Charisma ⟜Charisma AnotherCharacter
+⍤⤙= Strength ⟜Strength AnotherCharacter
+
+# Additional tests to check for some randomness
+
+# Check if Ability is returning valid results, 100 times
+⍤⤙=1/= ×≥3:⊸≤18 ⍥(⊂Ability) 100 []
+
+# Check if Ability is returning at least 2 different values when called 100 times
+⍤⤙>1⧻◴⍥(⊂Ability) 100 []
+
+# Check if Character is returning at least 2 different Characters when called 100 times
+⍤⤙>1⧻◴⍥(⊂Character) 100 []