Add acronym exercise (#67)

Author: keiravillekode

config.json

@@ -105,6 +105,14 @@
         "prerequisites": [],
         "difficulty": 2
       },
+      {
+        "slug": "acronym",
+        "name": "Acronym",
+        "uuid": "970bea05-1a05-4f88-9401-2977b8358f5d",
+        "practices": [],
+        "prerequisites": [],
+        "difficulty": 3
+      },
       {
         "slug": "binary-search",
         "name": "Binary Search",

exercises/practice/acronym/.docs/instructions.md

@@ -0,0 +1,17 @@
+# Instructions
+
+Convert a phrase to its acronym.
+
+Techies love their TLA (Three Letter Acronyms)!
+
+Help generate some jargon by writing a program that converts a long name like Portable Network Graphics to its acronym (PNG).
+
+Punctuation is handled as follows: hyphens are word separators (like whitespace); all other punctuation can be removed from the input.
+
+For example:
+
+| Input                     | Output |
+| ------------------------- | ------ |
+| As Soon As Possible       | ASAP   |
+| Liquid-crystal display    | LCD    |
+| Thank George It's Friday! | TGIF   |

exercises/practice/acronym/.meta/config.json

@@ -0,0 +1,19 @@
+{
+  "authors": [
+    "keiravillekode"
+  ],
+  "files": {
+    "solution": [
+      "acronym.fut"
+    ],
+    "test": [
+      "test.fut"
+    ],
+    "example": [
+      ".meta/example.fut"
+    ]
+  },
+  "blurb": "Convert a long phrase to its acronym.",
+  "source": "Julien Vanier",
+  "source_url": "https://github.com/monkbroc"
+}

exercises/practice/acronym/.meta/example.fut

@@ -0,0 +1,8 @@
+def abbreviate (phrase: []u8): []u8 =
+  let (result, _) = loop (result, letter) = ("", false) for ch in phrase do
+    if ch == '\'' then (result, letter) else
+    if (ch & 223) - 'A' >= 26 then (result, false) else
+    if letter then (result, true) else
+    (result ++ [ch & 223], true)
+  in
+    result

exercises/practice/acronym/.meta/tests.toml

@@ -0,0 +1,37 @@
+# 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.
+
+[1e22cceb-c5e4-4562-9afe-aef07ad1eaf4]
+description = "basic"
+
+[79ae3889-a5c0-4b01-baf0-232d31180c08]
+description = "lowercase words"
+
+[ec7000a7-3931-4a17-890e-33ca2073a548]
+description = "punctuation"
+
+[32dd261c-0c92-469a-9c5c-b192e94a63b0]
+description = "all caps word"
+
+[ae2ac9fa-a606-4d05-8244-3bcc4659c1d4]
+description = "punctuation without whitespace"
+
+[0e4b1e7c-1a6d-48fb-81a7-bf65eb9e69f9]
+description = "very long abbreviation"
+
+[6a078f49-c68d-4b7b-89af-33a1a98c28cc]
+description = "consecutive delimiters"
+
+[5118b4b1-4572-434c-8d57-5b762e57973e]
+description = "apostrophes"
+
+[adc12eab-ec2d-414f-b48c-66a4fc06cdef]
+description = "underscore emphasis"

exercises/practice/acronym/acronym.fut

@@ -0,0 +1 @@
+def abbreviate (phrase: []u8): []u8 = ???

exercises/practice/acronym/test.fut

@@ -0,0 +1,49 @@
+import "acronym"
+
+-- basic
+-- ==
+-- input { "Portable Network Graphics" }
+-- output { "PNG" }
+
+-- lowercase words
+-- ==
+-- input { "Ruby on Rails" }
+-- output { "ROR" }
+
+-- punctuation
+-- ==
+-- input { "First In, First Out" }
+-- output { "FIFO" }
+
+-- all caps word
+-- ==
+-- input { "GNU Image Manipulation Program" }
+-- output { "GIMP" }
+
+-- punctuation without whitespace
+-- ==
+-- input { "Complementary metal-oxide semiconductor" }
+-- output { "CMOS" }
+
+-- very long abbreviation
+-- ==
+-- input { "Rolling On The Floor Laughing So Hard That My Dogs Came Over And Licked Me" }
+-- output { "ROTFLSHTMDCOALM" }
+
+-- consecutive delimiters
+-- ==
+-- input { "Something - I made up from thin air" }
+-- output { "SIMUFTA" }
+
+-- apostrophes
+-- ==
+-- input { "Halley's Comet" }
+-- output { "HC" }
+
+-- underscore emphasis
+-- ==
+-- input { "The Road _Not_ Taken" }
+-- output { "TRNT" }
+
+def main (phrase: []u8): []u8 =
+  abbreviate phrase