Add raindrops (#115)

* Add raindrops

* add "strings" to practices list

---------

Co-authored-by: Nenad Misić <xinef.it@gmail.com>

config.json

@@ -112,6 +112,14 @@
         "prerequisites": [],
         "difficulty": 2
       },
+      {
+        "slug": "raindrops",
+        "name": "Raindrops",
+        "uuid": "d2cc23d5-2ed1-4115-9b9a-4b62993e750c",
+        "practices": ["strings"],
+        "prerequisites": [],
+        "difficulty": 2
+      },
       {
         "slug": "square-root",
         "name": "Square Root",

exercises/practice/raindrops/.docs/instructions.md

@@ -0,0 +1,24 @@
+# Instructions
+
+Your task is to convert a number into its corresponding raindrop sounds.
+
+If a given number:
+
+- is divisible by 3, add "Pling" to the result.
+- is divisible by 5, add "Plang" to the result.
+- is divisible by 7, add "Plong" to the result.
+- **is not** divisible by 3, 5, or 7, the result should be the number as a string.
+
+## Examples
+
+- 28 is divisible by 7, but not 3 or 5, so the result would be `"Plong"`.
+- 30 is divisible by 3 and 5, but not 7, so the result would be `"PlingPlang"`.
+- 34 is not divisible by 3, 5, or 7, so the result would be `"34"`.
+
+~~~~exercism/note
+A common way to test if one number is evenly divisible by another is to compare the [remainder][remainder] or [modulus][modulo] to zero.
+Most languages provide operators or functions for one (or both) of these.
+
+[remainder]: https://exercism.org/docs/programming/operators/remainder
+[modulo]: https://en.wikipedia.org/wiki/Modulo_operation
+~~~~

exercises/practice/raindrops/.docs/introduction.md

@@ -0,0 +1,3 @@
+# Introduction
+
+Raindrops is a slightly more complex version of the FizzBuzz challenge, a classic interview question.

exercises/practice/raindrops/.meta/config.json

@@ -0,0 +1,22 @@
+{
+  "authors": [
+    "BNAndras"
+  ],
+  "files": {
+    "solution": [
+      "src/lib.cairo"
+    ],
+    "test": [
+      "tests/raindrops.cairo"
+    ],
+    "example": [
+      ".meta/example.cairo"
+    ],
+    "invalidator": [
+      "Scarb.toml"
+    ]
+  },
+  "blurb": "Convert a number into its corresponding raindrop sounds - Pling, Plang and Plong.",
+  "source": "A variation on FizzBuzz, a famous technical interview question that is intended to weed out potential candidates. That question is itself derived from Fizz Buzz, a popular children's game for teaching division.",
+  "source_url": "https://en.wikipedia.org/wiki/Fizz_buzz"
+}

exercises/practice/raindrops/.meta/example.cairo

@@ -0,0 +1,21 @@
+pub fn convert(x: u64) -> ByteArray {
+    let mut result = "";
+
+    if x % 3 == 0 {
+        result += "Pling";
+    }
+
+    if x % 5 == 0 {
+        result += "Plang";
+    }
+
+    if x % 7 == 0 {
+        result += "Plong";
+    }
+
+    if result == "" {
+        result = format!("{x}");
+    }
+
+    return result;
+}

exercises/practice/raindrops/.meta/tests.toml

@@ -0,0 +1,64 @@
+# This is an auto-generated file.
+#
+# Regenerating this file via `configlet sync` will:
+# - Recreate every `description` key/value pair
+# - Recreate every `reimplements` key/value pair, where they exist in problem-specifications
+# - Remove any `include = true` key/value pair (an omitted `include` key implies inclusion)
+# - Preserve any other key/value pair
+#
+# As user-added comments (using the # character) will be removed when this file
+# is regenerated, comments can be added via a `comment` key.
+
+[1575d549-e502-46d4-a8e1-6b7bec6123d8]
+description = "the sound for 1 is 1"
+
+[1f51a9f9-4895-4539-b182-d7b0a5ab2913]
+description = "the sound for 3 is Pling"
+
+[2d9bfae5-2b21-4bcd-9629-c8c0e388f3e0]
+description = "the sound for 5 is Plang"
+
+[d7e60daa-32ef-4c23-b688-2abff46c4806]
+description = "the sound for 7 is Plong"
+
+[6bb4947b-a724-430c-923f-f0dc3d62e56a]
+description = "the sound for 6 is Pling as it has a factor 3"
+
+[ce51e0e8-d9d4-446d-9949-96eac4458c2d]
+description = "2 to the power 3 does not make a raindrop sound as 3 is the exponent not the base"
+
+[0dd66175-e3e2-47fc-8750-d01739856671]
+description = "the sound for 9 is Pling as it has a factor 3"
+
+[022c44d3-2182-4471-95d7-c575af225c96]
+description = "the sound for 10 is Plang as it has a factor 5"
+
+[37ab74db-fed3-40ff-b7b9-04acdfea8edf]
+description = "the sound for 14 is Plong as it has a factor of 7"
+
+[31f92999-6afb-40ee-9aa4-6d15e3334d0f]
+description = "the sound for 15 is PlingPlang as it has factors 3 and 5"
+
+[ff9bb95d-6361-4602-be2c-653fe5239b54]
+description = "the sound for 21 is PlingPlong as it has factors 3 and 7"
+
+[d2e75317-b72e-40ab-8a64-6734a21dece1]
+description = "the sound for 25 is Plang as it has a factor 5"
+
+[a09c4c58-c662-4e32-97fe-f1501ef7125c]
+description = "the sound for 27 is Pling as it has a factor 3"
+
+[bdf061de-8564-4899-a843-14b48b722789]
+description = "the sound for 35 is PlangPlong as it has factors 5 and 7"
+
+[c4680bee-69ba-439d-99b5-70c5fd1a7a83]
+description = "the sound for 49 is Plong as it has a factor 7"
+
+[17f2bc9a-b65a-4d23-8ccd-266e8c271444]
+description = "the sound for 52 is 52"
+
+[e46677ed-ff1a-419f-a740-5c713d2830e4]
+description = "the sound for 105 is PlingPlangPlong as it has factors 3, 5 and 7"
+
+[13c6837a-0fcd-4b86-a0eb-20572f7deb0b]
+description = "the sound for 3125 is Plang as it has a factor 5"

exercises/practice/raindrops/Scarb.toml

@@ -0,0 +1,4 @@
+[package]
+name = "raindrops"
+version = "0.1.0"
+edition = "2023_11"

exercises/practice/raindrops/src/lib.cairo

@@ -0,0 +1,3 @@
+pub fn convert(x: u64) -> ByteArray {
+    panic!("implement `convert`")
+}

exercises/practice/raindrops/tests/raindrops.cairo

@@ -0,0 +1,108 @@
+use raindrops::convert;
+
+#[test]
+fn the_sound_for_1_is_1() {
+    assert_eq!(convert(1), "1");
+}
+
+#[test]
+#[ignore]
+fn the_sound_for_3_is_pling() {
+    assert_eq!(convert(3), "Pling");
+}
+
+#[test]
+#[ignore]
+fn the_sound_for_5_is_plang() {
+    assert_eq!(convert(5), "Plang");
+}
+
+#[test]
+#[ignore]
+fn the_sound_for_7_is_plong() {
+    assert_eq!(convert(7), "Plong");
+}
+
+#[test]
+#[ignore]
+fn the_sound_for_6_is_pling_as_it_has_a_factor_3() {
+    assert_eq!(convert(6), "Pling");
+}
+
+#[test]
+#[ignore]
+fn the_sound_for_8_is_8() {
+    assert_eq!(convert(8), "8");
+}
+
+#[test]
+#[ignore]
+fn the_sound_for_9_is_pling_as_it_has_a_factor_3() {
+    assert_eq!(convert(9), "Pling");
+}
+
+#[test]
+#[ignore]
+fn the_sound_for_10_is_plang_as_it_has_a_factor_5() {
+    assert_eq!(convert(10), "Plang");
+}
+
+#[test]
+#[ignore]
+fn the_sound_for_14_is_plong_as_it_has_a_factor_7() {
+    assert_eq!(convert(14), "Plong");
+}
+
+#[test]
+#[ignore]
+fn the_sound_for_15_is_plingplang_as_it_has_factors_3_and_5() {
+    assert_eq!(convert(15), "PlingPlang");
+}
+
+#[test]
+#[ignore]
+fn the_sound_for_21_is_plingplong_as_it_has_factors_3_and_7() {
+    assert_eq!(convert(21), "PlingPlong");
+}
+
+#[test]
+#[ignore]
+fn the_sound_for_25_is_plang_as_it_has_a_factor_5() {
+    assert_eq!(convert(25), "Plang");
+}
+
+#[test]
+#[ignore]
+fn the_sound_for_27_is_pling_as_it_has_a_factor_3() {
+    assert_eq!(convert(27), "Pling");
+}
+
+#[test]
+#[ignore]
+fn the_sound_for_35_is_plangplong_as_it_has_factors_5_and_7() {
+    assert_eq!(convert(35), "PlangPlong");
+}
+
+#[test]
+#[ignore]
+fn the_sound_for_49_is_plong_as_it_has_a_factor_7() {
+    assert_eq!(convert(49), "Plong");
+}
+
+#[test]
+#[ignore]
+fn the_sound_for_52_is_52() {
+    assert_eq!(convert(52), "52");
+}
+
+#[test]
+#[ignore]
+fn the_sound_for_105_is_plingplangplong_as_it_has_factors_3_5_and_7() {
+    assert_eq!(convert(105), "PlingPlangPlong");
+}
+
+#[test]
+#[ignore]
+fn the_sound_for_3125_is_plang_as_it_has_a_factor_5() {
+    assert_eq!(convert(3125), "Plang");
+}