Add Series exercise

config.json

@@ -331,7 +331,7 @@
           "arrays"
         ],
         "prerequisites": [
-          "arrays"  
+          "arrays"
         ]
       },
       {
@@ -488,6 +488,14 @@
         ],
         "difficulty": 2
       },
+      {
+        "slug": "series",
+        "name": "Series",
+        "uuid": "824cefbf-a25d-445c-abc4-d92824006de1",
+        "difficulty": 2,
+        "practices":     ["conditionals", "numbers", "strings", "compare", "variables", "functions"],
+        "prerequisites": ["conditionals", "numbers", "strings", "compare"]
+      },
       {
         "slug": "gigasecond",
         "name": "Gigasecond",

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": [
+    "IsaacG"
+  ],
+  "files": {
+    "solution": [
+      "series.jq"
+    ],
+    "test": [
+      "test-series.bats"
+    ],
+    "example": [
+      ".meta/example.jq"
+    ]
+  },
+  "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.jq

@@ -0,0 +1,14 @@
+def assert(cond; errmsg):
+  if (cond | not) then errmsg | halt_error(1)
+  else .
+  end;
+
+# Check all edge cases/validations.
+assert(.sliceLength != 0; "slice length cannot be zero") |
+assert(.sliceLength > 0; "slice length cannot be negative") |
+assert(.series | length > 0; "series cannot be empty") |
+assert(.sliceLength <= (.series | length); "slice length cannot be greater than series length") |
+# Actual solution.
+.series as $series |
+.sliceLength as $length |
+[range(($series | length) - $length + 1) | $series[.:. + $length]]

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"