1
exercism fetch ruby diamond

Diamond

The diamond kata takes as its input a letter, and outputs it in a diamond shape. Given a letter, it prints a diamond starting with 'A', with the supplied letter at the widest point.

Requirements

Examples

In the following examples, spaces are indicated by · characters.

Diamond for letter 'A':

1
A

Diamond for letter 'C':

1
2
3
4
5
··A··
·B·B·
C···C
·B·B·
··A··

Diamond for letter 'E':

1
2
3
4
5
6
7
8
9
····A····
···B·B···
··C···C··
·D·····D·
E·······E
·D·····D·
··C···C··
···B·B···
····A····

For installation and learning resources, refer to the exercism help page.

For running the tests provided, you will need the Minitest gem. Open a terminal window and run the following command to install minitest:

1
gem install minitest

If you would like color output, you can require 'minitest/pride' in the test file, or note the alternative instruction, below, for running the test file.

Run the tests from the exercise directory using the following command:

1
ruby diamond_test.rb

To include color from the command line:

1
ruby -r minitest/pride diamond_test.rb

Source

Seb Rose http://claysnow.co.uk/recycling-tests-in-tdd/

Submitting Incomplete Solutions

It's possible to submit an incomplete solution so you can see how others have completed the exercise.