2017-08-15

vimscript/hello-world/README.md

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+# Hello World
+
+The classical introductory exercise. Just say "Hello, World!".
+
+["Hello, World!"](http://en.wikipedia.org/wiki/%22Hello,_world!%22_program) is
+the traditional first program for beginning programming in a new language
+or environment.
+
+The objectives are simple:
+
+- Write a function that returns 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.
+
+# How to run the tests
+
+If you don't know how to run Vader tests, see:
+[Tests](http://exercism.io/languages/vimscript/tests).
+
+For general information about the Vim script track, see:
+[Help](http://exercism.io/languages/vimscript).
+
+## Source
+
+This is an exercise to introduce users to using Exercism [http://en.wikipedia.org/wiki/%22Hello,_world!%22_program](http://en.wikipedia.org/wiki/%22Hello,_world!%22_program)
+
+## Submitting Incomplete Solutions
+It's possible to submit an incomplete solution so you can see how others have completed the exercise.

vimscript/hello-world/hello_world.vader

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+Execute (says hello using default argument):
+  AssertEqual "Hello, World!", Hello()
+
+Execute (says hello using name "Bram"):
+  AssertEqual "Hello, Bram!", Hello('Bram')
+
+Execute (says hello using name "Bill Joy"):
+  AssertEqual "Hello, Bill Joy!", Hello('Bill Joy')

vimscript/hello-world/hello_world.vim

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+"
+" Greet someone or something!
+"
+" If no argument is given, return 'Hello, World!'.
+" If the optional argument is given, greet that name instead.
+"
+" Hint: If you're confused by the first line in the function,
+"       read `:help a:0`.
+"
+"       It also uses the short if-then-else syntax which is
+"       called ternary operator in other languages:
+"
+"          condition ? true : false
+"
+function! Hello(...) abort
+  let name = (a:0 == 1 ? a:1 : 'World')
+
+  " your implementation goes here
+
+endfunction