Add series exercise

config.json

@@ -100,6 +100,14 @@
         "prerequisites": [],
         "difficulty": 2
       },
+      {
+        "slug": "series",
+        "name": "Series",
+        "uuid": "8546a842-c58e-4bbb-a965-f015f83102d3",
+        "practices": [],
+        "prerequisites": [],
+        "difficulty": 3
+      },
       {
         "slug": "isogram",
         "name": "Isogram",

exercises/practice/series/.docs/instructions.md

@@ -0,0 +1,19 @@
+# Instructions
+
+Given a string of digits, output all the contiguous substrings of length `n` in that string in the order that they appear.
+
+For example, the string "49142" has the following 3-digit series:
+
+- "491"
+- "914"
+- "142"
+
+And the following 4-digit series:
+
+- "4914"
+- "9142"
+
+And if you ask for a 6-digit series from a 5-digit string, you deserve whatever you get.
+
+Note that these series are only required to occupy _adjacent positions_ in the input;
+the digits need not be _numerically consecutive_.

exercises/practice/series/.meta/config.json

@@ -0,0 +1,19 @@
+{
+  "authors": [
+    "erikschierboom"
+  ],
+  "files": {
+    "solution": [
+      "src/series.art"
+    ],
+    "test": [
+      "tests/test-series.art"
+    ],
+    "example": [
+      ".meta/src/example.art"
+    ]
+  },
+  "blurb": "Given a string of digits, output all the contiguous substrings of length `n` in that string.",
+  "source": "A subset of the Problem 8 at Project Euler",
+  "source_url": "https://projecteuler.net/problem=8"
+}

exercises/practice/series/.meta/src/example.art

@@ -0,0 +1,8 @@
+slices: function [series sliceLength][
+    if sliceLength < 1 -> return null
+    if sliceLength > size series -> return null
+    if empty? series -> return null
+
+    numberOfSlices: (size series) - sliceLength
+    map 0..numberOfSlices 'i -> slice series i (i + sliceLength - 1)
+]

exercises/practice/series/.meta/tests.toml

@@ -0,0 +1,43 @@
+# 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.
+
+[7ae7a46a-d992-4c2a-9c15-a112d125ebad]
+description = "slices of one from one"
+
+[3143b71d-f6a5-4221-aeae-619f906244d2]
+description = "slices of one from two"
+
+[dbb68ff5-76c5-4ccd-895a-93dbec6d5805]
+description = "slices of two"
+
+[19bbea47-c987-4e11-a7d1-e103442adf86]
+description = "slices of two overlap"
+
+[8e17148d-ba0a-4007-a07f-d7f87015d84c]
+description = "slices can include duplicates"
+
+[bd5b085e-f612-4f81-97a8-6314258278b0]
+description = "slices of a long series"
+
+[6d235d85-46cf-4fae-9955-14b6efef27cd]
+description = "slice length is too large"
+
+[d7957455-346d-4e47-8e4b-87ed1564c6d7]
+description = "slice length is way too large"
+
+[d34004ad-8765-4c09-8ba1-ada8ce776806]
+description = "slice length cannot be zero"
+
+[10ab822d-8410-470a-a85d-23fbeb549e54]
+description = "slice length cannot be negative"
+
+[c7ed0812-0e4b-4bf3-99c4-28cbbfc246a2]
+description = "empty series is invalid"

exercises/practice/series/src/series.art

@@ -0,0 +1,3 @@
+slices: function [series sliceLength][
+    panic "Please implement the slices function"
+]

exercises/practice/series/tester.art

@@ -0,0 +1,3 @@
+import {unitt}!
+
+runTests.failFast findTests "tests"

exercises/practice/series/tests/test-series.art

@@ -0,0 +1,59 @@
+import {unitt}!
+import {src/series}!
+
+suite "Series" [
+    test "slices of one from one" [
+        result: slices "1" 1
+        assert -> ["1"] = result
+    ]
+
+    test.skip "slices of one from two" [
+        result: slices "12" 1
+        assert -> ["1", "2"] = result
+    ]
+
+    test.skip "slices of two" [
+        result: slices "35" 2
+        assert -> ["35"] = result
+    ]
+
+    test.skip "slices of two overlap" [
+        result: slices "9142" 2
+        assert -> ["91", "14", "42"] = result
+    ]
+
+    test.skip "slices can include duplicates" [
+        result: slices "777777" 3
+        assert -> ["777", "777", "777", "777"] = result
+    ]
+
+    test.skip "slices of a long series" [
+        result: slices "918493904243" 5
+        assert -> ["91849", "18493", "84939", "49390", "93904", "39042", "90424", "04243"] = result
+    ]
+
+    test.skip "slice length is too large" [
+        result: slices "12345" 6
+        assert -> null = result
+    ]
+
+    test.skip "slice length is way too large" [
+        result: slices "12345" 42
+        assert -> null = result
+    ]
+
+    test.skip "slice length cannot be zero" [
+        result: slices "12345" 0
+        assert -> null = result
+    ]
+
+    test.skip "slice length cannot be negative" [
+        result: slices "123" neg 1
+        assert -> null = result
+    ]
+
+    test.skip "empty series is invalid" [
+        result: slices "" 1
+        assert -> null = result
+    ]
+]