Transpose in Ruby
Take input text and output it transposed.
exercism fetch ruby transpose
Given an input text output it transposed.
Roughly explained, the transpose of a matrix:
is given by:
Rows become columns and columns become rows. See https://en.wikipedia.org/wiki/Transpose.
If the input has rows of different lengths, this is to be solved as follows:
- Pad to the left with spaces.
- Don't pad to the right.
Therefore, transposing this matrix:
In general, all characters from the input should also be present in the transposed output. That means that if a column in the input text contains only spaces on its bottom-most row(s), the corresponding output row should contain the spaces in its right-most column(s).
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:
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.
In order to run the test, you can run the test file from the exercise
directory. For example, if the test suite is called
hello_world_test.rb, you can run the following command:
To include color from the command line:
ruby -r minitest/pride hello_world_test.rb
Reddit r/dailyprogrammer challenge #270 [Easy]. https://www.reddit.com/r/dailyprogrammer/comments/4msu2x/challenge_270_easy_transpose_the_input_text
Submitting Incomplete Solutions
It's possible to submit an incomplete solution so you can see how others have completed the exercise.