65 lines
2.2 KiB
Markdown
65 lines
2.2 KiB
Markdown
# Raindrops
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Convert a number to a string, the contents of which depend on the number's factors.
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- If the number has 3 as a factor, output 'Pling'.
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- If the number has 5 as a factor, output 'Plang'.
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- If the number has 7 as a factor, output 'Plong'.
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- If the number does not have 3, 5, or 7 as a factor,
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just pass the number's digits straight through.
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## Examples
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- 28's factors are 1, 2, 4, **7**, 14, 28.
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- In raindrop-speak, this would be a simple "Plong".
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- 30's factors are 1, 2, **3**, **5**, 6, 10, 15, 30.
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- In raindrop-speak, this would be a "PlingPlang".
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- 34 has four factors: 1, 2, 17, and 34.
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- In raindrop-speak, this would be "34".
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Run the tests with:
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```bash
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bats raindrops_test.sh
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```
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After the first test(s) pass, continue by commenting out or removing the
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`[[ $BATS_RUN_SKIPPED == true ]] || skip`
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annotations prepending other tests.
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To run all tests, including the ones with `skip` annotations, run:
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```bash
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BATS_RUN_SKIPPED=true bats raindrops_test.sh
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```
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## Source
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A variation on a famous interview question intended to weed out potential candidates. [http://jumpstartlab.com](http://jumpstartlab.com)
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## External utilities
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`Bash` is a language to write "scripts" -- programs that can call
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external tools, such as
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[`sed`](https://www.gnu.org/software/sed/),
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[`awk`](https://www.gnu.org/software/gawk/),
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[`date`](https://www.gnu.org/software/coreutils/manual/html_node/date-invocation.html)
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and even programs written in other programming languages,
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like [`Python`](https://www.python.org/).
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This track does not restrict the usage of these utilities, and as long
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as your solution is portable between systems and does not require
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installation of third party applications, feel free to use them to solve
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the exercise.
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For an extra challenge, if you would like to have a better understanding
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of the language, try to re-implement the solution in pure `Bash`,
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without using any external tools. Note that there are some types of
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problems that bash cannot solve, such as performing floating point
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arithmetic and manipulating dates: for those, you must call out to an
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external tool.
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## Submitting Incomplete Solutions
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It's possible to submit an incomplete solution so you can see how others
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have completed the exercise.
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