Rust: completed Reverse String again

rust/gigasecond/.exercism/metadata.json

@@ -1 +1 @@
-{"track":"rust","exercise":"gigasecond","id":"46cf4dcc2c1d42f48213bc4054d72a04","url":"https://exercism.org/tracks/rust/exercises/gigasecond","handle":"Chomp1295","is_requester":true,"auto_approve":false}
+{"track":"rust","exercise":"gigasecond","id":"20e9d27ceb734a788023c5f555e0d88e","url":"https://exercism.org/tracks/rust/exercises/gigasecond","handle":"Chomp1295","is_requester":true,"auto_approve":false}

rust/gigasecond/src/lib.rs

@@ -1,6 +1,6 @@
-use time::{Duration, PrimitiveDateTime as DateTime};
+use time::PrimitiveDateTime as DateTime;
 
 // Returns a DateTime one billion seconds after start.
 pub fn after(start: DateTime) -> DateTime {
-    start + Duration::seconds(1_000_000_000)
+    start + time::Duration::seconds(1_000_000_000)
 }

rust/gigasecond/tests/gigasecond.rs

@@ -1,48 +1,59 @@
-use time::PrimitiveDateTime as DateTime;
+#[test]
+fn date_only_specification_of_time() {
+    let start = datetime(2011, 4, 25, 0, 0, 0);
+    let actual = gigasecond::after(start);
+    let expected = datetime(2043, 1, 1, 1, 46, 40);
+    assert_eq!(actual, expected);
+}
 
-/// Create a datetime from the given numeric point in time.
-///
-/// Panics if any field is invalid.
-fn dt(year: i32, month: u8, day: u8, hour: u8, minute: u8, second: u8) -> DateTime {
-    use time::{Date, Time};
+#[test]
+#[ignore]
+fn second_test_for_date_only_specification_of_time() {
+    let start = datetime(1977, 6, 13, 0, 0, 0);
+    let actual = gigasecond::after(start);
+    let expected = datetime(2009, 2, 19, 1, 46, 40);
+    assert_eq!(actual, expected);
+}
 
-    DateTime::new(
+#[test]
+#[ignore]
+fn third_test_for_date_only_specification_of_time() {
+    let start = datetime(1959, 7, 19, 0, 0, 0);
+    let actual = gigasecond::after(start);
+    let expected = datetime(1991, 3, 27, 1, 46, 40);
+    assert_eq!(actual, expected);
+}
+
+#[test]
+#[ignore]
+fn full_time_specified() {
+    let start = datetime(2015, 1, 24, 22, 0, 0);
+    let actual = gigasecond::after(start);
+    let expected = datetime(2046, 10, 2, 23, 46, 40);
+    assert_eq!(actual, expected);
+}
+
+#[test]
+#[ignore]
+fn full_time_with_day_roll_over() {
+    let start = datetime(2015, 1, 24, 23, 59, 59);
+    let actual = gigasecond::after(start);
+    let expected = datetime(2046, 10, 3, 1, 46, 39);
+    assert_eq!(actual, expected);
+}
+
+fn datetime(
+    year: i32,
+    month: u8,
+    day: u8,
+    hour: u8,
+    minute: u8,
+    second: u8,
+) -> time::PrimitiveDateTime {
+    use time::{Date, PrimitiveDateTime, Time};
+
+    PrimitiveDateTime::new(
         Date::from_calendar_date(year, month.try_into().unwrap(), day).unwrap(),
         Time::from_hms(hour, minute, second).unwrap(),
     )
 }
-
-#[test]
-fn date() {
-    let start_date = dt(2011, 4, 25, 0, 0, 0);
-
-    assert_eq!(gigasecond::after(start_date), dt(2043, 1, 1, 1, 46, 40));
-}
-
-#[test]
-fn another_date() {
-    let start_date = dt(1977, 6, 13, 0, 0, 0);
-
-    assert_eq!(gigasecond::after(start_date), dt(2009, 2, 19, 1, 46, 40));
-}
-
-#[test]
-fn third_date() {
-    let start_date = dt(1959, 7, 19, 0, 0, 0);
-
-    assert_eq!(gigasecond::after(start_date), dt(1991, 3, 27, 1, 46, 40));
-}
-
-#[test]
-fn datetime() {
-    let start_date = dt(2015, 1, 24, 22, 0, 0);
-
-    assert_eq!(gigasecond::after(start_date), dt(2046, 10, 2, 23, 46, 40));
-}
-
-#[test]
-fn another_datetime() {
-    let start_date = dt(2015, 1, 24, 23, 59, 59);
-
-    assert_eq!(gigasecond::after(start_date), dt(2046, 10, 3, 1, 46, 39));
-}

rust/hello-world/.exercism/metadata.json

@@ -1 +1 @@
-{"track":"rust","exercise":"hello-world","id":"8fc7d235b9714b939df049625c414d2c","url":"https://exercism.org/tracks/rust/exercises/hello-world","handle":"Chomp1295","is_requester":true,"auto_approve":false}
+{"track":"rust","exercise":"hello-world","id":"bf8f90455cd64bda84afecac949ecd0d","url":"https://exercism.org/tracks/rust/exercises/hello-world","handle":"Chomp1295","is_requester":true,"auto_approve":false}

rust/reverse-string/.exercism/metadata.json

@@ -1 +1 @@
-{"track":"rust","exercise":"reverse-string","id":"aeec5dd024f94c60b89e66907f4e90b9","url":"https://exercism.org/tracks/rust/exercises/reverse-string","handle":"Chomp1295","is_requester":true,"auto_approve":false}
+{"track":"rust","exercise":"reverse-string","id":"f97879b6def647a5bf82751034c483e3","url":"https://exercism.org/tracks/rust/exercises/reverse-string","handle":"Chomp1295","is_requester":true,"auto_approve":false}

rust/reverse-string/Cargo.toml

@@ -1,9 +1,10 @@
-[dependencies]
-
-[features]
-grapheme = []
-
 [package]
 edition = "2021"
 name = "reverse_string"
 version = "1.2.0"
+
+[features]
+grapheme = []
+
+[dependencies]
+unicode-segmentation = "=1.11.0"

rust/reverse-string/README.md

@@ -21,17 +21,20 @@ Some examples:
 
 ## Bonus
 
-Test your function on this string: `uüu` and see what happens. Try to write a function that properly
-reverses this string. Hint: grapheme clusters
+Test your function on this string: `uüu` and see what happens.
+Try to write a function that properly reverses this string.
+Hint: grapheme clusters
 
-To get the bonus test to run, remove the ignore flag (`#[ignore]`) from the
-last test, and execute the tests with:
+To get the bonus test to run, remove the ignore flag (`#[ignore]`) from the last test, and execute the tests with:
 
 ```bash
-$ cargo test --features grapheme
+cargo test --features grapheme
 ```
 
-You will need to use external libraries (a `crate` in rust lingo) for the bonus task. A good place to look for those is [crates.io](https://crates.io/), the official repository of crates.
+You will need to use external libraries (a `crate` in rust lingo) for the bonus task.
+A good place to look for those is [crates.io](https://crates.io/), the official repository of crates.
+Please remember that only a limited set of crates is supported by our test runner.
+The full list is in [this file](https://github.com/exercism/rust-test-runner/blob/main/local-registry/Cargo.toml) under the section `[dependencies]`.
 
 [Check the documentation](https://doc.rust-lang.org/cargo/guide/dependencies.html) for instructions on how to use external crates in your projects.
 

rust/reverse-string/src/lib.rs

@@ -1,3 +1,5 @@
+use unicode_segmentation::UnicodeSegmentation;
+
 pub fn reverse(input: &str) -> String {
-    input.chars().rev().collect()
+    input.graphemes(true).rev().collect()
 }

rust/reverse-string/tests/reverse-string.rs

@@ -9,6 +9,7 @@ fn an_empty_string() {
 }
 
 #[test]
+
 fn a_word() {
     let input = "robot";
     let output = reverse(input);
@@ -17,6 +18,7 @@ fn a_word() {
 }
 
 #[test]
+
 fn a_capitalized_word() {
     let input = "Ramen";
     let output = reverse(input);
@@ -25,6 +27,7 @@ fn a_capitalized_word() {
 }
 
 #[test]
+
 fn a_sentence_with_punctuation() {
     let input = "I'm hungry!";
     let output = reverse(input);
@@ -33,6 +36,7 @@ fn a_sentence_with_punctuation() {
 }
 
 #[test]
+
 fn a_palindrome() {
     let input = "racecar";
     let output = reverse(input);
@@ -41,6 +45,7 @@ fn a_palindrome() {
 }
 
 #[test]
+
 fn an_even_sized_word() {
     let input = "drawer";
     let output = reverse(input);
@@ -49,6 +54,7 @@ fn an_even_sized_word() {
 }
 
 #[test]
+
 fn wide_characters() {
     let input = "子猫";
     let output = reverse(input);
@@ -57,7 +63,6 @@ fn wide_characters() {
 }
 
 #[test]
-#[ignore]
 #[cfg(feature = "grapheme")]
 fn grapheme_cluster_with_pre_combined_form() {
     let input = "Würstchenstand";
@@ -67,7 +72,6 @@ fn grapheme_cluster_with_pre_combined_form() {
 }
 
 #[test]
-#[ignore]
 #[cfg(feature = "grapheme")]
 fn grapheme_clusters() {
     let input = "ผู้เขียนโปรแกรม";

zig/resistor-color-duo/.exercism/config.json

@@ -0,0 +1,19 @@
+{
+  "authors": [
+    "massivelivefun"
+  ],
+  "files": {
+    "solution": [
+      "resistor_color_duo.zig"
+    ],
+    "test": [
+      "test_resistor_color_duo.zig"
+    ],
+    "example": [
+      ".meta/example.zig"
+    ]
+  },
+  "blurb": "Convert color codes, as used on resistors, to a numeric value.",
+  "source": "Maud de Vries, Erik Schierboom",
+  "source_url": "https://github.com/exercism/problem-specifications/issues/1464"
+}

zig/resistor-color-duo/.exercism/metadata.json

@@ -0,0 +1 @@
+{"track":"zig","exercise":"resistor-color-duo","id":"4904409bf2c744acb829962709a345ef","url":"https://exercism.org/tracks/zig/exercises/resistor-color-duo","handle":"Chomp1295","is_requester":true,"auto_approve":false}

zig/resistor-color-duo/HELP.md

@@ -0,0 +1,53 @@
+# Help
+
+## Running the tests
+
+Write your code in `<exercise_name>.zig`.
+
+To run the tests for an exercise, run:
+
+```bash
+zig test test_exercise_name.zig
+```
+
+in the exercise's root directory (replacing `exercise_name` with the name of the exercise).
+
+## Submitting your solution
+
+You can submit your solution using the `exercism submit resistor_color_duo.zig` command.
+This command will upload your solution to the Exercism website and print the solution page's URL.
+
+It's possible to submit an incomplete solution which allows you to:
+
+- See how others have completed the exercise
+- Request help from a mentor
+
+## Need to get help?
+
+If you'd like help solving the exercise, check the following pages:
+
+- The [Zig track's documentation](https://exercism.org/docs/tracks/zig)
+- The [Zig track's programming category on the forum](https://forum.exercism.org/c/programming/zig)
+- [Exercism's programming category on the forum](https://forum.exercism.org/c/programming/5)
+- The [Frequently Asked Questions](https://exercism.org/docs/using/faqs)
+
+Should those resources not suffice, you could submit your (incomplete) solution to request mentoring.
+
+- [The Zig Programming Language Documentation][documentation] is a great overview of all of the language features that Zig provides to those who use it.
+- [Zig Guide][zig-guide] is an excellent primer that explains the language features that Zig has to offer.
+- [Ziglings][ziglings] is highly recommended.
+  Learn Zig by fixing tiny broken programs.
+- [The Zig Programming Language Discord][discord-zig] is the main [Discord][discord].
+  It provides a great way to get in touch with the Zig community at large, and get some quick, direct help for any Zig related problem.
+- [#zig][irc] on irc.freenode.net is the main Zig IRC channel.
+- [/r/Zig][reddit] is the main Zig subreddit.
+- [Stack Overflow][stack-overflow] can be used to discover code snippets and solutions to problems that may have already asked and maybe solved by others.
+
+[discord]: https://discordapp.com
+[discord-zig]: https://discord.com/invite/gxsFFjE
+[documentation]: https://ziglang.org/documentation/master
+[irc]: https://webchat.freenode.net/?channels=%23zig
+[reddit]: https://www.reddit.com/r/Zig
+[stack-overflow]: https://stackoverflow.com/questions/tagged/zig
+[zig-guide]: https://zig.guide/
+[ziglings]: https://codeberg.org/ziglings/exercises

zig/resistor-color-duo/README.md

@@ -0,0 +1,48 @@
+# Resistor Color Duo
+
+Welcome to Resistor Color Duo on Exercism's Zig Track.
+If you need help running the tests or submitting your code, check out `HELP.md`.
+
+## Instructions
+
+If you want to build something using a Raspberry Pi, you'll probably use _resistors_.
+For this exercise, you need to know two things about them:
+
+- Each resistor has a resistance value.
+- Resistors are small - so small in fact that if you printed the resistance value on them, it would be hard to read.
+
+To get around this problem, manufacturers print color-coded bands onto the resistors to denote their resistance values.
+Each band has a position and a numeric value.
+
+The first 2 bands of a resistor have a simple encoding scheme: each color maps to a single number.
+For example, if they printed a brown band (value 1) followed by a green band (value 5), it would translate to the number 15.
+
+In this exercise you are going to create a helpful program so that you don't have to remember the values of the bands.
+The program will take color names as input and output a two digit number, even if the input is more than two colors!
+
+The band colors are encoded as follows:
+
+- black: 0
+- brown: 1
+- red: 2
+- orange: 3
+- yellow: 4
+- green: 5
+- blue: 6
+- violet: 7
+- grey: 8
+- white: 9
+
+From the example above:
+brown-green should return 15, and
+brown-green-violet should return 15 too, ignoring the third color.
+
+## Source
+
+### Created by
+
+- @massivelivefun
+
+### Based on
+
+Maud de Vries, Erik Schierboom - https://github.com/exercism/problem-specifications/issues/1464

zig/resistor-color-duo/resistor_color_duo.zig

@@ -0,0 +1,5 @@
+pub const ColorBand = enum(usize) { black = 0, brown = 1, red = 2, orange = 3, yellow = 4, green = 5, blue = 6, violet = 7, grey = 8, white = 9 };
+
+pub fn colorCode(comptime colors: [2]ColorBand) usize {
+    return 10 * @intFromEnum(colors[0]) + @intFromEnum(colors[1]);
+}

zig/resistor-color-duo/test_resistor_color_duo.zig

@@ -0,0 +1,47 @@
+const std = @import("std");
+const testing = std.testing;
+
+const resistor_color_duo = @import("resistor_color_duo.zig");
+const ColorBand = resistor_color_duo.ColorBand;
+
+test "brown and black" {
+    const array = [_]ColorBand{ .brown, .black };
+    const expected: usize = 10;
+    const actual = resistor_color_duo.colorCode(array);
+    try testing.expectEqual(expected, actual);
+}
+
+test "blue and grey" {
+    const array = [_]ColorBand{ .blue, .grey };
+    const expected: usize = 68;
+    const actual = resistor_color_duo.colorCode(array);
+    try testing.expectEqual(expected, actual);
+}
+
+test "yellow and violet" {
+    const array = [_]ColorBand{ .yellow, .violet };
+    const expected: usize = 47;
+    const actual = resistor_color_duo.colorCode(array);
+    try testing.expectEqual(expected, actual);
+}
+
+test "white and red" {
+    const array = [_]ColorBand{ .white, .red };
+    const expected: usize = 92;
+    const actual = resistor_color_duo.colorCode(array);
+    try testing.expectEqual(expected, actual);
+}
+
+test "orange and orange" {
+    const array = [_]ColorBand{ .orange, .orange };
+    const expected: usize = 33;
+    const actual = resistor_color_duo.colorCode(array);
+    try testing.expectEqual(expected, actual);
+}
+
+test "black and brown, one-digit" {
+    const array = [_]ColorBand{ .black, .brown };
+    const expected: usize = 1;
+    const actual = resistor_color_duo.colorCode(array);
+    try testing.expectEqual(expected, actual);
+}