vimscript/difference-of-squares: download exercise

vimscript/difference-of-squares/.exercism/config.json

@@ -0,0 +1,23 @@
+{
+  "authors": [
+    "mhinz"
+  ],
+  "contributors": [
+    "kotp",
+    "kytrinyx"
+  ],
+  "files": {
+    "solution": [
+      "difference_of_squares.vim"
+    ],
+    "test": [
+      "difference_of_squares.vader"
+    ],
+    "example": [
+      ".meta/example.vim"
+    ]
+  },
+  "blurb": "Find the difference between the square of the sum and the sum of the squares of the first N natural numbers.",
+  "source": "Problem 6 at Project Euler",
+  "source_url": "https://projecteuler.net/problem=6"
+}

vimscript/difference-of-squares/.exercism/metadata.json

@@ -0,0 +1 @@
+{"track":"vimscript","exercise":"difference-of-squares","id":"ee357e1bcef04f968dbb32e557759484","url":"https://exercism.org/tracks/vimscript/exercises/difference-of-squares","handle":"vpayno","is_requester":true,"auto_approve":false}

vimscript/difference-of-squares/HELP.md

@@ -0,0 +1,52 @@
+# Help
+
+## Running the tests
+
+Open your solution:
+
+```bash
+$ vim <exercise>.vim
+```
+
+Source the current file to make its global functions available to Vim:
+
+```
+:source %
+```
+
+Run the tests:
+
+```
+:Vader <exercise>.vader
+```
+
+Replace `<exercise>` with your exercise's name.
+
+## Submitting your solution
+
+You can submit your solution using the `exercism submit difference_of_squares.vim` command.
+This command will upload your solution to the Exercism website and print the solution page's URL.
+
+It's possible to submit an incomplete solution which allows you to:
+
+- See how others have completed the exercise
+- Request help from a mentor
+
+## Need to get help?
+
+If you'd like help solving the exercise, check the following pages:
+
+- The [Vim script track's documentation](https://exercism.org/docs/tracks/vimscript)
+- The [Vim script track's programming category on the forum](https://forum.exercism.org/c/programming/vimscript)
+- [Exercism's programming category on the forum](https://forum.exercism.org/c/programming/5)
+- The [Frequently Asked Questions](https://exercism.org/docs/using/faqs)
+
+Should those resources not suffice, you could submit your (incomplete) solution to request mentoring.
+
+To get help if you're having trouble, you can use one of the following resources:
+
+- [Learn Vimscript the Hard Way](http://learnvimscriptthehardway.stevelosh.com)
+- [IBM DeveloperWorks: Scripting the Vim
+  editor](http://www.ibm.com/developerworks/views/linux/libraryview.jsp?sort_order=asc&sort_by=Title&search_by=scripting+the+vim+editor)
+- [/r/vimscript](https://www.reddit.com/r/vimscript) is the Vimscript subreddit.
+- [StackOverflow](http://stackoverflow.com/) can be used to search for your problem and see if it has been answered already. You can also ask and answer questions.

vimscript/difference-of-squares/README.md

@@ -0,0 +1,34 @@
+# Difference of Squares
+
+Welcome to Difference of Squares on Exercism's Vim script Track.
+If you need help running the tests or submitting your code, check out `HELP.md`.
+
+## Instructions
+
+Find the difference between the square of the sum and the sum of the squares of the first N natural numbers.
+
+The square of the sum of the first ten natural numbers is
+(1 + 2 + ... + 10)² = 55² = 3025.
+
+The sum of the squares of the first ten natural numbers is
+1² + 2² + ... + 10² = 385.
+
+Hence the difference between the square of the sum of the first ten natural numbers and the sum of the squares of the first ten natural numbers is 3025 - 385 = 2640.
+
+You are not expected to discover an efficient solution to this yourself from first principles; research is allowed, indeed, encouraged.
+Finding the best algorithm for the problem is a key skill in software engineering.
+
+## Source
+
+### Created by
+
+- @mhinz
+
+### Contributed to by
+
+- @kotp
+- @kytrinyx
+
+### Based on
+
+Problem 6 at Project Euler - https://projecteuler.net/problem=6

vimscript/difference-of-squares/difference_of_squares.vader

@@ -0,0 +1,46 @@
+"
+" Version: 1.2.0
+"
+
+Execute (square of sum 1):
+  let number = 1
+  let expected = 1
+  AssertEqual expected, SquareOfSum(number)
+
+Execute (square of sum 5):
+  let number = 5
+  let expected = 225
+  AssertEqual expected, SquareOfSum(number)
+
+Execute (square of sum 100):
+  let number = 100
+  let expected = 25502500
+  AssertEqual expected, SquareOfSum(number)
+Execute (sum of squares 1):
+  let number = 1
+  let expected = 1
+  AssertEqual expected, SumOfSquares(number)
+
+Execute (sum of squares 5):
+  let number = 5
+  let expected = 55
+  AssertEqual expected, SumOfSquares(number)
+
+Execute (sum of squares 100):
+  let number = 100
+  let expected = 338350
+  AssertEqual expected, SumOfSquares(number)
+Execute (difference of squares 1):
+  let number = 1
+  let expected = 0
+  AssertEqual expected, DifferenceOfSquares(number)
+
+Execute (difference of squares 5):
+  let number = 5
+  let expected = 170
+  AssertEqual expected, DifferenceOfSquares(number)
+
+Execute (difference of squares 100):
+  let number = 100
+  let expected = 25164150
+  AssertEqual expected, DifferenceOfSquares(number)

vimscript/difference-of-squares/difference_of_squares.vim

@@ -0,0 +1,24 @@
+"
+" Find the difference between the square of the sum and the sum of the squares
+" of the first N natural numbers.
+"
+" Examples:
+"
+"   :echo SquareOfSum(3)
+"   36
+"   :echo SumOfSquares(3)
+"   14
+"   :echo DifferenceOfSquares(3)
+"   22
+"
+function! DifferenceOfSquares(number) abort
+  " your implementation goes here
+endfunction
+
+function! SquareOfSum(number) abort
+  " your implementation goes here
+endfunction
+
+function! SumOfSquares(number) abort
+  " your implementation goes here
+endfunction