Zig track WIP

README.md

@@ -46,4 +46,7 @@ Tracks List
 - [x] - isogram
 - [x] - hamming
 - [x] - grains
-- [x] - resistor color
+- [x] - resistor color
+- [x] - resistor color duo
+- [x] - triangle
+- [x] - darts

zig/zig/darts/.exercism/config.json

@@ -0,0 +1,18 @@
+{
+  "authors": [
+    "massivelivefun"
+  ],
+  "files": {
+    "solution": [
+      "darts.zig"
+    ],
+    "test": [
+      "test_darts.zig"
+    ],
+    "example": [
+      ".meta/example.zig"
+    ]
+  },
+  "blurb": "Write a function that returns the earned points in a single toss of a Darts game.",
+  "source": "Inspired by an exercise created by a professor Della Paolera in Argentina"
+}

zig/zig/darts/.exercism/metadata.json

@@ -0,0 +1 @@
+{"track":"zig","exercise":"darts","id":"c7f4946c571847fbb0f2b6d926bf55f0","url":"https://exercism.org/tracks/zig/exercises/darts","handle":"theodesp","is_requester":true,"auto_approve":false}

zig/zig/darts/HELP.md

@@ -0,0 +1,49 @@
+# 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 darts.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)
+- [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 Learn][zig-learn] is an excellent primer that explains the language features that Zig has to offer.
+- [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-learn]: https://ziglearn.org/

zig/zig/darts/README.md

@@ -0,0 +1,38 @@
+# Darts
+
+Welcome to Darts on Exercism's Zig Track.
+If you need help running the tests or submitting your code, check out `HELP.md`.
+
+## Instructions
+
+Write a function that returns the earned points in a single toss of a Darts game.
+
+[Darts][darts] is a game where players throw darts at a [target][darts-target].
+
+In our particular instance of the game, the target rewards 4 different amounts of points, depending on where the dart lands:
+
+- If the dart lands outside the target, player earns no points (0 points).
+- If the dart lands in the outer circle of the target, player earns 1 point.
+- If the dart lands in the middle circle of the target, player earns 5 points.
+- If the dart lands in the inner circle of the target, player earns 10 points.
+
+The outer circle has a radius of 10 units (this is equivalent to the total radius for the entire target), the middle circle a radius of 5 units, and the inner circle a radius of 1.
+Of course, they are all centered at the same point (that is, the circles are [concentric][] defined by the coordinates (0, 0).
+
+Write a function that given a point in the target (defined by its [Cartesian coordinates][cartesian-coordinates] `x` and `y`, where `x` and `y` are [real][real-numbers]), returns the correct amount earned by a dart landing at that point.
+
+[darts]: https://en.wikipedia.org/wiki/Darts
+[darts-target]: https://en.wikipedia.org/wiki/Darts#/media/File:Darts_in_a_dartboard.jpg
+[concentric]: https://mathworld.wolfram.com/ConcentricCircles.html
+[cartesian-coordinates]: https://www.mathsisfun.com/data/cartesian-coordinates.html
+[real-numbers]: https://www.mathsisfun.com/numbers/real-numbers.html
+
+## Source
+
+### Created by
+
+- @massivelivefun
+
+### Based on
+
+Inspired by an exercise created by a professor Della Paolera in Argentina

zig/zig/darts/darts.zig

@@ -0,0 +1,23 @@
+pub const Coordinate = struct {
+    x: f32, y: f32,
+
+    pub fn init(x_coord: f32, y_coord: f32) Coordinate {
+        return Coordinate{.x = x_coord, .y = y_coord};
+    }
+    pub fn score(self: Coordinate) usize {
+        if (isInsideCircle(self.x, self.y, 0, 0, 1)) {
+            return 10;
+        }
+        if (isInsideCircle(self.x, self.y, 0, 0, 5)) {
+            return 5;
+        }
+        if (isInsideCircle(self.x, self.y, 0, 0, 10)) {
+            return 1;
+        }
+        return 0;
+    }
+};
+
+fn isInsideCircle(x: f32, y: f32, c_x: f32, c_y: f32, r: f32) bool {
+    return r * r >= (x-c_x) * (x-c_x) + (y-c_y) * (y-c_y);
+}

zig/zig/darts/test_darts.zig

@@ -0,0 +1,95 @@
+const std = @import("std");
+const testing = std.testing;
+
+const darts = @import("darts.zig");
+
+test "missed target" {
+    const expected: usize = 0;
+    const coordinate = darts.Coordinate.init(-9.0, 9.0);
+    const actual = coordinate.score();
+    try testing.expectEqual(expected, actual);
+}
+
+test "on the outer circle" {
+    const expected: usize = 1;
+    const coordinate = darts.Coordinate.init(0.0, 10.0);
+    const actual = coordinate.score();
+    try testing.expectEqual(expected, actual);
+}
+
+test "on the middle circle" {
+    const expected: usize = 5;
+    const coordinate = darts.Coordinate.init(-5.0, 0.0);
+    const actual = coordinate.score();
+    try testing.expectEqual(expected, actual);
+}
+
+test "on the inner circle" {
+    const expected: usize = 10;
+    const coordinate = darts.Coordinate.init(0.0, -1.0);
+    const actual = coordinate.score();
+    try testing.expectEqual(expected, actual);
+}
+
+test "exactly on center" {
+    const expected: usize = 10;
+    const coordinate = darts.Coordinate.init(0.0, 0.0);
+    const actual = coordinate.score();
+    try testing.expectEqual(expected, actual);
+}
+
+test "near the center" {
+    const expected: usize = 10;
+    const coordinate = darts.Coordinate.init(-0.1, -0.1);
+    const actual = coordinate.score();
+    try testing.expectEqual(expected, actual);
+}
+
+test "just within the inner circle" {
+    const expected: usize = 10;
+    const coordinate = darts.Coordinate.init(0.7, 0.7);
+    const actual = coordinate.score();
+    try testing.expectEqual(expected, actual);
+}
+
+test "just outside the inner circle" {
+    const expected: usize = 5;
+    const coordinate = darts.Coordinate.init(0.8, -0.8);
+    const actual = coordinate.score();
+    try testing.expectEqual(expected, actual);
+}
+
+test "just within the middle circle" {
+    const expected: usize = 5;
+    const coordinate = darts.Coordinate.init(3.5, -3.5);
+    const actual = coordinate.score();
+    try testing.expectEqual(expected, actual);
+}
+
+test "just outside the middle circle" {
+    const expected: usize = 1;
+    const coordinate = darts.Coordinate.init(-3.6, -3.6);
+    const actual = coordinate.score();
+    try testing.expectEqual(expected, actual);
+}
+
+test "just within the outer circle" {
+    const expected: usize = 1;
+    const coordinate = darts.Coordinate.init(-7.0, 7.0);
+    const actual = coordinate.score();
+    try testing.expectEqual(expected, actual);
+}
+
+test "just outside the outer circle" {
+    const expected: usize = 0;
+    const coordinate = darts.Coordinate.init(7.1, -7.1);
+    const actual = coordinate.score();
+    try testing.expectEqual(expected, actual);
+}
+
+test "asymmetric position between the inner and middle circles" {
+    const expected: usize = 5;
+    const coordinate = darts.Coordinate.init(0.5, -4.0);
+    const actual = coordinate.score();
+    try testing.expectEqual(expected, actual);
+}

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

@@ -0,0 +1 @@
+{"track":"zig","exercise":"resistor-color-duo","id":"4026a021f4bd42069f154709027f234e","url":"https://exercism.org/tracks/zig/exercises/resistor-color-duo","handle":"theodesp","is_requester":true,"auto_approve":false}

zig/zig/resistor-color-duo/HELP.md

@@ -0,0 +1,49 @@
+# 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)
+- [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 Learn][zig-learn] is an excellent primer that explains the language features that Zig has to offer.
+- [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-learn]: https://ziglearn.org/

zig/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
+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/zig/resistor-color-duo/resistor_color_duo.zig

@@ -0,0 +1,19 @@
+pub const ColorBand = enum(u8) {
+    black, 
+    brown, 
+    red, 
+    orange, 
+    yellow,
+    green, 
+    blue,  
+    violet, 
+    grey,
+    white,
+};
+
+pub fn colorCode(colors: [2]ColorBand) usize {
+    if (colors[0] == ColorBand.black) {
+        return @enumToInt(colors[1]);
+    }
+    return @enumToInt(colors[0]) * 10 + @enumToInt(colors[1]);
+}