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.
- The first row contains one ‘A’.
- The last row contains one ‘A’.
- All rows, except the first and last, have exactly two identical letters.
- All rows have as many trailing spaces as leading spaces. (This might be 0).
- The diamond is horizontally symmetric.
- The diamond is vertically symmetric.
- The diamond has a square shape (width equals height).
- The letters form a diamond shape.
- The top half has the letters in ascending order.
- The bottom half has the letters in descending order.
- The four corners (containing the spaces) are triangles.
In the following examples, spaces are indicated by
Diamond for letter ‘A’:
Diamond for letter ‘C’:
··A·· ·B·B· C···C ·B·B· ··A··
Diamond for letter ‘E’:
····A···· ···B·B··· ··C···C·· ·D·····D· E·······E ·D·····D· ··C···C·· ···B·B··· ····A····
To ensure the correctness of your implementation, see test.sh with usage:
sh test.sh /path/to/program
It is expected that your program takes as its only argument the letter to generate a diamond for, prints the formatted diamond to STDOUT, and exits successfully.
All submissions must contain a statement that the code is your own work (groups are ok!) and placing the code under either CC0, CC-BY, or CC-BY-SA. Submissions are by email to email@example.com. Attaching each source file is preferred, but tarballs or git URLs will also be accepted (especially when directory structure matters). Submissions may be in any programming language that can be compiled or interpreted on a Debian Stable system.
If relevant, please make it clear what name, pseudonym, or group name you would like your submission attributed to. This name (and the code content of your submission) will be made public.
Submissions are due by and the winning teardown post will be published the following month.
This exercise and its tests based on https://github.com/exercism/rust/tree/master/exercises/diamond, original license:
Copyright (c) 2017 Exercism, Inc
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.