commit bfe7491f4c5326bc6bba9380e0b424b2584284c0
parent 7f063b445c365935735e8851204bdd86616bbc69
Author: dwrz <dwrz@dwrz.net>
Date: Thu, 4 Jul 2019 23:14:45 +0000
Add bash/raindrops
Diffstat:
3 files changed, 198 insertions(+), 0 deletions(-)
diff --git a/bash/raindrops/README.md b/bash/raindrops/README.md
@@ -0,0 +1,64 @@
+# Raindrops
+
+Convert a number to a string, the contents of which depend on the number's factors.
+
+- If the number has 3 as a factor, output 'Pling'.
+- If the number has 5 as a factor, output 'Plang'.
+- If the number has 7 as a factor, output 'Plong'.
+- If the number does not have 3, 5, or 7 as a factor,
+ just pass the number's digits straight through.
+
+## Examples
+
+- 28's factors are 1, 2, 4, **7**, 14, 28.
+ - In raindrop-speak, this would be a simple "Plong".
+- 30's factors are 1, 2, **3**, **5**, 6, 10, 15, 30.
+ - In raindrop-speak, this would be a "PlingPlang".
+- 34 has four factors: 1, 2, 17, and 34.
+ - In raindrop-speak, this would be "34".
+
+
+Run the tests with:
+
+```bash
+bats raindrops_test.sh
+```
+
+After the first test(s) pass, continue by commenting out or removing the
+`[[ $BATS_RUN_SKIPPED == true ]] || skip`
+annotations prepending other tests.
+
+To run all tests, including the ones with `skip` annotations, run:
+
+```bash
+BATS_RUN_SKIPPED=true bats raindrops_test.sh
+```
+
+## Source
+
+A variation on a famous interview question intended to weed out potential candidates. [http://jumpstartlab.com](http://jumpstartlab.com)
+
+
+## External utilities
+`Bash` is a language to write "scripts" -- programs that can call
+external tools, such as
+[`sed`](https://www.gnu.org/software/sed/),
+[`awk`](https://www.gnu.org/software/gawk/),
+[`date`](https://www.gnu.org/software/coreutils/manual/html_node/date-invocation.html)
+and even programs written in other programming languages,
+like [`Python`](https://www.python.org/).
+This track does not restrict the usage of these utilities, and as long
+as your solution is portable between systems and does not require
+installation of third party applications, feel free to use them to solve
+the exercise.
+
+For an extra challenge, if you would like to have a better understanding
+of the language, try to re-implement the solution in pure `Bash`,
+without using any external tools. Note that there are some types of
+problems that bash cannot solve, such as performing floating point
+arithmetic and manipulating dates: for those, you must call out to an
+external tool.
+
+## Submitting Incomplete Solutions
+It's possible to submit an incomplete solution so you can see how others
+have completed the exercise.
diff --git a/bash/raindrops/raindrops.sh b/bash/raindrops/raindrops.sh
@@ -0,0 +1,25 @@
+#!/usr/bin/env bash
+
+main() {
+ local name=""
+
+ if [ $(($1 % 3)) -eq 0 ]; then
+ name="Pling"
+ fi
+
+ if [ $(($1 % 5)) -eq 0 ]; then
+ name="${name}Plang"
+ fi
+
+ if [ $(($1 % 7)) -eq 0 ]; then
+ name="${name}Plong"
+ fi
+
+ if [ "$name" = "" ]; then
+ name="$1"
+ fi
+
+ echo $name
+}
+
+main "$@"
diff --git a/bash/raindrops/raindrops_test.sh b/bash/raindrops/raindrops_test.sh
@@ -0,0 +1,109 @@
+#!/usr/bin/env bash
+
+@test "the sound for 1 is 1" {
+ run bash raindrops.sh 1
+ [ "$status" -eq 0 ]
+ [ "$output" == "1" ]
+}
+
+@test "the sound for 3 is Pling" {
+ run bash raindrops.sh 3
+ [ "$status" -eq 0 ]
+ [ "$output" == "Pling" ]
+}
+
+@test "the sound for 5 is Plang" {
+ run bash raindrops.sh 5
+ [ "$status" -eq 0 ]
+ [ "$output" == "Plang" ]
+}
+
+@test "the sound for 7 is Plong" {
+ run bash raindrops.sh 7
+ [ "$status" -eq 0 ]
+ [ "$output" == "Plong" ]
+}
+
+@test "the sound for 6 is Pling as it has a factor 3" {
+ run bash raindrops.sh 6
+ [ "$status" -eq 0 ]
+ [ "$output" == "Pling" ]
+}
+
+@test "2 to the power 3 does not make a raindrop sound as 3 is the exponent not the base" {
+ run bash raindrops.sh 8
+ [ "$status" -eq 0 ]
+ [ "$output" == "8" ]
+}
+
+@test "the sound for 9 is Pling as it has a factor 3" {
+ run bash raindrops.sh 9
+ [ "$status" -eq 0 ]
+ [ "$output" == "Pling" ]
+}
+
+@test "the sound for 10 is Plang as it has a factor 5" {
+ run bash raindrops.sh 10
+ [ "$status" -eq 0 ]
+ [ "$output" == "Plang" ]
+}
+
+@test "the sound for 14 is Plong as it has a factor of 7" {
+ run bash raindrops.sh 14
+ [ "$status" -eq 0 ]
+ [ "$output" == "Plong" ]
+}
+
+@test "the sound for 15 is PlingPlang as it has factors 3 and 5" {
+ run bash raindrops.sh 15
+ [ "$status" -eq 0 ]
+ [ "$output" == "PlingPlang" ]
+}
+
+@test "the sound for 21 is PlingPlong as it has factors 3 and 7" {
+ run bash raindrops.sh 21
+ [ "$status" -eq 0 ]
+ [ "$output" == "PlingPlong" ]
+}
+
+@test "the sound for 25 is Plang as it has a factor 5" {
+ run bash raindrops.sh 25
+ [ "$status" -eq 0 ]
+ [ "$output" == "Plang" ]
+}
+
+@test "the sound for 27 is Pling as it has a factor 3" {
+ run bash raindrops.sh 27
+ [ "$status" -eq 0 ]
+ [ "$output" == "Pling" ]
+}
+
+@test "the sound for 35 is PlangPlong as it has factors 5 and 7" {
+ run bash raindrops.sh 35
+ [ "$status" -eq 0 ]
+ [ "$output" == "PlangPlong" ]
+}
+
+@test "the sound for 49 is Plong as it has a factor 7" {
+ run bash raindrops.sh 49
+ [ "$status" -eq 0 ]
+ [ "$output" == "Plong" ]
+}
+
+@test "the sound for 52 is 52" {
+ run bash raindrops.sh 52
+ [ "$status" -eq 0 ]
+ [ "$output" == "52" ]
+}
+
+@test "the sound for 105 is PlingPlangPlong as it has factors 3, 5 and 7" {
+ run bash raindrops.sh 105
+ [ "$status" -eq 0 ]
+ [ "$output" == "PlingPlangPlong" ]
+}
+
+@test "the sound for 3125 is Plang as it has a factor 5" {
+ run bash raindrops.sh 3125
+ [ "$status" -eq 0 ]
+ [ "$output" == "Plang" ]
+}
