diff --git a/config.json b/config.json index 7634975..2c990de 100644 --- a/config.json +++ b/config.json @@ -825,6 +825,14 @@ "prerequisites": [], "difficulty": 4 }, + { + "slug": "dnd-character", + "name": "D&D Character", + "uuid": "8c617fa4-5c2f-4be3-b7dc-8f8bf8214326", + "practices": [], + "prerequisites": [], + "difficulty": 4 + }, { "slug": "binary-search", "name": "Binary Search", diff --git a/exercises/practice/dnd-character/.docs/instructions.md b/exercises/practice/dnd-character/.docs/instructions.md new file mode 100644 index 0000000..e14e794 --- /dev/null +++ b/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 diff --git a/exercises/practice/dnd-character/.docs/introduction.md b/exercises/practice/dnd-character/.docs/introduction.md new file mode 100644 index 0000000..5301f61 --- /dev/null +++ b/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 diff --git a/exercises/practice/dnd-character/.meta/config.json b/exercises/practice/dnd-character/.meta/config.json new file mode 100644 index 0000000..a292f91 --- /dev/null +++ b/exercises/practice/dnd-character/.meta/config.json @@ -0,0 +1,19 @@ +{ + "authors": [ + "erikschierboom" + ], + "files": { + "solution": [ + "dnd-character.R" + ], + "test": [ + "test_dnd-character.R" + ], + "example": [ + ".meta/example.R" + ] + }, + "blurb": "Randomly generate Dungeons & Dragons characters.", + "source": "Simon Shine, Erik Schierboom", + "source_url": "https://github.com/exercism/problem-specifications/issues/616#issuecomment-437358945" +} diff --git a/exercises/practice/dnd-character/.meta/example.R b/exercises/practice/dnd-character/.meta/example.R new file mode 100644 index 0000000..503438a --- /dev/null +++ b/exercises/practice/dnd-character/.meta/example.R @@ -0,0 +1,24 @@ +modifier <- function(score) { + (score - 10) %/% 2 +} + +ability <- function() { + sample(1:6, 4, replace = TRUE) |> sort() |> tail(n = 3) |> sum() +} + +new_character <- function() { + constitution <- ability() + + structure( + list( + strength = ability(), + dexterity = ability(), + intelligence = ability(), + wisdom = ability(), + charisma = ability(), + constitution = constitution, + hitpoints = 10 + modifier(constitution) + ), + class = "character" + ) +} diff --git a/exercises/practice/dnd-character/.meta/tests.toml b/exercises/practice/dnd-character/.meta/tests.toml new file mode 100644 index 0000000..719043b --- /dev/null +++ b/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" diff --git a/exercises/practice/dnd-character/dnd-character.R b/exercises/practice/dnd-character/dnd-character.R new file mode 100644 index 0000000..b320863 --- /dev/null +++ b/exercises/practice/dnd-character/dnd-character.R @@ -0,0 +1,11 @@ +modifier <- function(score) { + +} + +ability <- function() { + +} + +new_character <- function() { + +} diff --git a/exercises/practice/dnd-character/test_dnd-character.R b/exercises/practice/dnd-character/test_dnd-character.R new file mode 100644 index 0000000..df39321 --- /dev/null +++ b/exercises/practice/dnd-character/test_dnd-character.R @@ -0,0 +1,99 @@ +source("./dnd-character.R") +library(testthat) + +test_that("Ability modifier for score 3 is -4", { + expect_equal(modifier(3), -4) +}) + +test_that("Ability modifier for score 4 is -3", { + expect_equal(modifier(4), -3) +}) + +test_that("Ability modifier for score 5 is -3", { + expect_equal(modifier(5), -3) +}) + +test_that("Ability modifier for score 6 is -2", { + expect_equal(modifier(6), -2) +}) + +test_that("Ability modifier for score 7 is -2", { + expect_equal(modifier(7), -2) +}) + +test_that("Ability modifier for score 8 is -1", { + expect_equal(modifier(8), -1) +}) + +test_that("Ability modifier for score 9 is -1", { + expect_equal(modifier(9), -1) +}) + +test_that("Ability modifier for score 10 is 0", { + expect_equal(modifier(10), 0) +}) + +test_that("Ability modifier for score 11 is 0", { + expect_equal(modifier(11), 0) +}) + +test_that("Ability modifier for score 12 is +1", { + expect_equal(modifier(12), 1) +}) + +test_that("Ability modifier for score 13 is +1", { + expect_equal(modifier(13), 1) +}) + +test_that("Ability modifier for score 14 is +2", { + expect_equal(modifier(14), 2) +}) + +test_that("Ability modifier for score 15 is +2", { + expect_equal(modifier(15), 2) +}) + +test_that("Ability modifier for score 16 is +3", { + expect_equal(modifier(16), 3) +}) + +test_that("Ability modifier for score 17 is +3", { + expect_equal(modifier(17), 3) +}) + +test_that("Ability modifier for score 18 is +4", { + expect_equal(modifier(18), 4) +}) + +test_that("Random ability is within range", { + for (i in 1:10) { + expect_true(ability() %in% 3:18) + } +}) + +test_that("Random character is valid", { + for (i in 1:10) { + character <- new_character() + expect_s3_class(character, "character") + expect_true(character$strength %in% 3:18) + expect_true(character$dexterity %in% 3:18) + expect_true(character$constitution %in% 3:18) + expect_true(character$intelligence %in% 3:18) + expect_true(character$wisdom %in% 3:18) + expect_true(character$charisma %in% 3:18) + expect_equal(character$hitpoints, 10 + modifier(character$constitution)) + } +}) + +test_that("Each ability is only calculated once", { + for (i in 1:10) { + character <- new_character() + expect_equal(character$strength, character$strength) + expect_equal(character$dexterity, character$dexterity) + expect_equal(character$constitution, character$constitution) + expect_equal(character$intelligence, character$intelligence) + expect_equal(character$wisdom, character$wisdom) + expect_equal(character$charisma, character$charisma) + expect_equal(character$hitpoints, character$hitpoints) + } +})