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Contents
# Transpose
Given an input text output it transposed.
Roughly explained, the transpose of a matrix:
```text
ABC
DEF
```
is given by:
```text
AD
BE
CF
```
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:
```text
ABC
DE
```
results in:
```text
AD
BE
C
```
And transposing:
```text
AB
DEF
```
results in:
```text
AD
BE
F
```
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).
## Running the tests
1. Go to the root of your PHP exercise directory, which is `<EXERCISM_WORKSPACE>/php`.
To find the Exercism workspace run
% exercism debug | grep Workspace
1. Get [PHPUnit] if you don't have it already.
% wget --no-check-certificate https://phar.phpunit.de/phpunit.phar
% chmod +x phpunit.phar
2. Execute the tests:
% ./phpunit.phar transpose/transpose_test.php
[PHPUnit]: http://phpunit.de
## Source
Reddit r/dailyprogrammer challenge #270 [Easy]. [https://www.reddit.com/r/dailyprogrammer/comments/4msu2x/challenge_270_easy_transpose_the_input_text](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.
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