Add Hello World (#3)

* Add Hello World

* remove .keep

* Give `solution`, `test` and `example` values in Hello World's `config.json`

* Add some previously removed values to config.json

Author: quintuple-mallard

config.json

@@ -22,7 +22,16 @@
   },
   "exercises": {
     "concept": [],
-    "practice": []
+    "practice": [
+      {
+        "slug": "hello-world",
+        "name": "Hello World",
+        "uuid": "8eab75b2-d469-4fe8-825a-d249df70af3e",
+        "practices": [],
+        "prerequisites": [],
+        "difficulty": 1
+      }
+    ]
   },
   "concepts": [],
   "key_features": [],

exercises/practice/.keep

@@ -0,0 +1,16 @@
+# Instructions
+
+The classical introductory exercise.
+Just say "Hello, World!".
+
+["Hello, World!"][hello-world] is the traditional first program for beginning programming in a new language or environment.
+
+The objectives are simple:
+
+- Modify the provided code so that it produces the string "Hello, World!".
+- Run the test suite and make sure that it succeeds.
+- Submit your solution and check it at the website.
+
+If everything goes well, you will be ready to fetch your first real exercise.
+
+[hello-world]: https://en.wikipedia.org/wiki/%22Hello,_world!%22_program

exercises/practice/hello-world/.docs/instructions.md

@@ -0,0 +1,19 @@
+{
+  "authors": [
+    "quintuple-mallard"
+  ],
+  "files": {
+    "solution": [
+      "hello-world.nu"
+    ],
+    "test": [
+      "tests.nu"
+    ],
+    "example": [
+      ".meta/example.nu"
+    ]
+  },
+  "blurb": "Exercism's classic introductory exercise. Just say \"Hello, World!\".",
+  "source": "This is an exercise to introduce users to using Exercism",
+  "source_url": "https://en.wikipedia.org/wiki/%22Hello,_world!%22_program"
+}

exercises/practice/hello-world/.meta/config.json

@@ -0,0 +1,3 @@
+export def hello [] {
+    "Hello, World!"
+}

exercises/practice/hello-world/.meta/example.nu

@@ -0,0 +1,13 @@
+# 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.
+
+[af9ffe10-dc13-42d8-a742-e7bdafac449d]
+description = "Say Hi!"

exercises/practice/hello-world/.meta/tests.toml

@@ -0,0 +1,3 @@
+export def hello [] {
+    "Goodbye, Mars!"
+}

exercises/practice/hello-world/hello-world.nu

@@ -0,0 +1,4 @@
+use hello-world.nu hello
+use std/assert
+
+assert equal (hello) "Hello, World!"