add darts exercise

config.json

@@ -387,6 +387,14 @@
         "difficulty": 8
       },
       {
+        "slug": "darts",
+        "name": "Darts",
+        "uuid": "4fd80fde-8868-44da-a52b-f4b8549c9cc8",
+        "practices": [],
+        "prerequisites": [],
+        "difficulty": 1
+      },
+      }
         "slug": "crypto-square",
         "name": "Crypto Square",
         "uuid": "5723544b-74d3-4483-b67e-5e7b513c8867",

exercises/practice/darts/.docs/instructions.md

@@ -0,0 +1,31 @@
+# Instructions
+
+Calculate the points scored in a single toss of a Darts game.
+
+[Darts][darts] is a game where players throw darts at a [target][darts-target].
+
+In our particular instance of the game, the target rewards 4 different amounts of points, depending on where the dart lands:
+
+![Our dart scoreboard with values from a complete miss to a bullseye](https://assets.exercism.org/images/exercises/darts/darts-scoreboard.svg)
+
+- If the dart lands outside the target, player earns no points (0 points).
+- If the dart lands in the outer circle of the target, player earns 1 point.
+- If the dart lands in the middle circle of the target, player earns 5 points.
+- If the dart lands in the inner circle of the target, player earns 10 points.
+
+The outer circle has a radius of 10 units (this is equivalent to the total radius for the entire target), the middle circle a radius of 5 units, and the inner circle a radius of 1.
+Of course, they are all centered at the same point — that is, the circles are [concentric][] defined by the coordinates (0, 0).
+
+Given a point in the target (defined by its [Cartesian coordinates][cartesian-coordinates] `x` and `y`, where `x` and `y` are [real][real-numbers]), calculate the correct score earned by a dart landing at that point.
+
+## Credit
+
+The scoreboard image was created by [habere-et-dispertire][habere-et-dispertire] using [Inkscape][inkscape].
+
+[darts]: https://en.wikipedia.org/wiki/Darts
+[darts-target]: https://en.wikipedia.org/wiki/Darts#/media/File:Darts_in_a_dartboard.jpg
+[concentric]: https://mathworld.wolfram.com/ConcentricCircles.html
+[cartesian-coordinates]: https://www.mathsisfun.com/data/cartesian-coordinates.html
+[real-numbers]: https://www.mathsisfun.com/numbers/real-numbers.html
+[habere-et-dispertire]: https://exercism.org/profiles/habere-et-dispertire
+[inkscape]: https://en.wikipedia.org/wiki/Inkscape

exercises/practice/darts/.meta/config.json

@@ -0,0 +1,18 @@
+{
+  "authors": [
+    "eNascimento178"
+  ],
+  "files": {
+    "solution": [
+      "darts.ijs"
+    ],
+    "test": [
+      "test.ijs"
+    ],
+    "example": [
+      ".meta/example.ijs"
+    ]
+  },
+  "blurb": "Calculate the points scored in a single toss of a Darts game.",
+  "source": "Inspired by an exercise created by a professor Della Paolera in Argentina"
+}

exercises/practice/darts/.meta/example.ijs

@@ -0,0 +1 @@
+score=: 1 5 10&((0 ,~ |.@[) {~ I.)@([: | j./) 

exercises/practice/darts/.meta/tests.toml

@@ -0,0 +1,49 @@
+# 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.
+
+[9033f731-0a3a-4d9c-b1c0-34a1c8362afb]
+description = "Missed target"
+
+[4c9f6ff4-c489-45fd-be8a-1fcb08b4d0ba]
+description = "On the outer circle"
+
+[14378687-ee58-4c9b-a323-b089d5274be8]
+description = "On the middle circle"
+
+[849e2e63-85bd-4fed-bc3b-781ae962e2c9]
+description = "On the inner circle"
+
+[1c5ffd9f-ea66-462f-9f06-a1303de5a226]
+description = "Exactly on center"
+
+[b65abce3-a679-4550-8115-4b74bda06088]
+description = "Near the center"
+
+[66c29c1d-44f5-40cf-9927-e09a1305b399]
+description = "Just within the inner circle"
+
+[d1012f63-c97c-4394-b944-7beb3d0b141a]
+description = "Just outside the inner circle"
+
+[ab2b5666-b0b4-49c3-9b27-205e790ed945]
+description = "Just within the middle circle"
+
+[70f1424e-d690-4860-8caf-9740a52c0161]
+description = "Just outside the middle circle"
+
+[a7dbf8db-419c-4712-8a7f-67602b69b293]
+description = "Just within the outer circle"
+
+[e0f39315-9f9a-4546-96e4-a9475b885aa7]
+description = "Just outside the outer circle"
+
+[045d7d18-d863-4229-818e-b50828c75d19]
+description = "Asymmetric position between the inner and middle circles"

exercises/practice/darts/darts.ijs

@@ -0,0 +1,3 @@
+require 'general/unittest'
+
+score=: 'You need to implement this verb.'13!:8 (55)

exercises/practice/darts/test.ijs

@@ -0,0 +1,152 @@
+load 'darts.ijs'
+
+
+before_all=: monad define
+  (]Description =: (3 : 'descriptions=: i.0')`(3 : 'descriptions=: descriptions , < y'))@.0 ''
+  (]Order       =: (3 : 'order=: i.0')`(3 : 'order=: order , < y'))@.0 ''
+  (]Task        =: (3 : 'tasks=: i.0')`(3 : 'tasks=: tasks , < y'))@.0 '' 
+)
+
+
+darts_test_01_ignore=: 0
+test_darts_test_01  =: monad define
+  Description@.1 ('Missed target')
+  Order@.1 (1)
+
+  NB. x=. _9
+  NB. y=. 9
+  NB. expected=. 0
+  assert 0 -: score _9 9
+)
+
+darts_test_02_ignore=: 1 NB. Change this value to 0 to run this test
+test_darts_test_02  =: monad define
+  Description@.1 ('On the outer circle')
+  Order@.1 (2)
+
+  NB. x=. 0
+  NB. y=. 10
+  NB. expected=. 1
+  assert 1 -: score 0 10
+)
+
+darts_test_03_ignore=: 1 NB. Change this value to 0 to run this test
+test_darts_test_03  =: monad define
+  Description@.1 ('On the middle circle')
+  Order@.1 (3)
+
+  NB. x=. _5
+  NB. y=. 0
+  NB. expected=. 5
+  assert 5 -: score _5 0
+)
+
+darts_test_04_ignore=: 1 NB. Change this value to 0 to run this test
+test_darts_test_04  =: monad define
+  Description@.1 ('On the inner circle')
+  Order@.1 (4)
+
+  NB. x=. 0
+  NB. y=. _1
+  NB. expected=. 10
+  assert 10 -: score 0 _1
+)
+
+darts_test_05_ignore=: 1 NB. Change this value to 0 to run this test
+test_darts_test_05  =: monad define
+  Description@.1 ('Exactly on center')
+  Order@.1 (5)
+
+  NB. x=. 0
+  NB. y=. 0
+  NB. expected=. 10
+  assert 10 -: score 0 0
+)
+
+darts_test_06_ignore=: 1 NB. Change this value to 0 to run this test
+test_darts_test_06  =: monad define
+  Description@.1 ('Near the center')
+  Order@.1 (6)
+
+  NB. x=. _0.100000000000000006
+  NB. y=. _0.100000000000000006
+  NB. expected=. 10
+  assert 10 -: score _0.100000000000000006 _0.100000000000000006
+)
+
+darts_test_07_ignore=: 1 NB. Change this value to 0 to run this test
+test_darts_test_07  =: monad define
+  Description@.1 ('Just within the inner circle')
+  Order@.1 (7)
+
+  NB. x=. 0.699999999999999956
+  NB. y=. 0.699999999999999956
+  NB. expected=. 10
+  assert 10 -: score 0.699999999999999956 0.699999999999999956
+)
+
+darts_test_08_ignore=: 1 NB. Change this value to 0 to run this test
+test_darts_test_08  =: monad define
+  Description@.1 ('Just outside the inner circle')
+  Order@.1 (8)
+
+  NB. x=. 0.800000000000000044
+  NB. y=. _0.800000000000000044
+  NB. expected=. 5
+  assert 5 -: score 0.800000000000000044 _0.800000000000000044
+)
+
+darts_test_09_ignore=: 1 NB. Change this value to 0 to run this test
+test_darts_test_09  =: monad define
+  Description@.1 ('Just within the middle circle')
+  Order@.1 (9)
+
+  NB. x=. _3.5
+  NB. y=. 3.5
+  NB. expected=. 5
+  assert 5 -: score _3.5 3.5
+)
+
+darts_test_10_ignore=: 1 NB. Change this value to 0 to run this test
+test_darts_test_10  =: monad define
+  Description@.1 ('Just outside the middle circle')
+  Order@.1 (10)
+
+  NB. x=. _3.60000000000000009
+  NB. y=. _3.60000000000000009
+  NB. expected=. 1
+  assert 1 -: score _3.60000000000000009 _3.60000000000000009
+)
+
+darts_test_11_ignore=: 1 NB. Change this value to 0 to run this test
+test_darts_test_11  =: monad define
+  Description@.1 ('Just within the outer circle')
+  Order@.1 (11)
+
+  NB. x=. _7
+  NB. y=. 7
+  NB. expected=. 1
+  assert 1 -: score _7 7
+)
+
+darts_test_12_ignore=: 1 NB. Change this value to 0 to run this test
+test_darts_test_12  =: monad define
+  Description@.1 ('Just outside the outer circle')
+  Order@.1 (12)
+
+  NB. x=. 7.09999999999999964
+  NB. y=. _7.09999999999999964
+  NB. expected=. 0
+  assert 0 -: score 7.09999999999999964 _7.09999999999999964
+)
+
+darts_test_13_ignore=: 1 NB. Change this value to 0 to run this test
+test_darts_test_13  =: monad define
+  Description@.1 ('Asymmetric position between the inner and middle circles')
+  Order@.1 (13)
+
+  NB. x=. 0.5
+  NB. y=. _4
+  NB. expected=. 5
+  assert 5 -: score 0.5 _4
+)