Add series exercise (#13)

* Add `series` exercise

* Update series.ua

Co-authored-by: Christian Willner <34183939+vaeng@users.noreply.github.com>

---------

Co-authored-by: Christian Willner <34183939+vaeng@users.noreply.github.com>

config.json

@@ -46,6 +46,14 @@
         "prerequisites": [],
         "difficulty": 5
       },
+      {
+        "slug": "series",
+        "name": "Series",
+        "uuid": "8a0bf181-02b7-4320-b7cf-83ecbf072560",
+        "practices": [],
+        "prerequisites": [],
+        "difficulty": 4
+      },
       {
         "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": [
+      "series.ua"
+    ],
+    "test": [
+      "tests.ua"
+    ],
+    "example": [
+      ".meta/example.ua"
+    ]
+  },
+  "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/example.ua

@@ -0,0 +1,2 @@
+Validate ← |2.2 ⍤"Invalid" ◡(×⊙(≤)◡(× ∩(>0) (>0))⧻:)
+Slices   ← |2 ⍣(◫ Validate)[]

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/series.ua

@@ -0,0 +1,3 @@
+# Returns all the overlapping slices of a contiguous array of a  given length
+# Slices ? Input Span
+Slices ← |2 ⊙(⍤ "Please implement Slices")

exercises/practice/series/tests.ua

@@ -0,0 +1,34 @@
+~ "series.ua" ~ Slices
+
+# slices of one from one?
+⍤⤙≍ ["1"] Slices 1 "1"
+
+# slices of one from two?
+⍤⤙≍ ["1" "2"] Slices 1 "12"
+
+# slices of two?
+⍤⤙≍ ["35"] Slices 2 "35"
+
+# slices of two overlap?
+⍤⤙≍ ["91" "14" "42"] Slices 2 "9142"
+
+# slices can include duplicates?
+⍤⤙≍ ["777" "777" "777" "777"] Slices 3 "777777"
+
+# slices of a long series?
+⍤⤙≍ ["91849" "18493" "84939" "49390" "93904" "39042" "90424" "04243"] Slices 5 "918493904243"
+
+# slice length is too large?
+⍤⤙≍ [] Slices 6 "12345"
+
+# slice length is way too large?
+⍤⤙≍ [] Slices 42 "12345"
+
+# slice length cannot be zero?
+⍤⤙≍ [] Slices 0 "12345"
+
+# slice length cannot be negative?
+⍤⤙≍ [] Slices ¯1 "123"
+
+# empty series is invalid?
+⍤⤙≍ [] Slices 1 ""