Add resistor-color-duo exercise

config.json

@@ -127,6 +127,14 @@
         "prerequisites": [],
         "difficulty": 4
       },
+      {
+        "slug": "resistor-color-duo",
+        "name": "Resistor Color Duo",
+        "uuid": "5d22390f-bce7-4920-b817-dc855ec2aacd",
+        "practices": [],
+        "prerequisites": [],
+        "difficulty": 4
+      },
       {
         "slug": "reverse-string",
         "name": "Reverse String",

exercises/practice/resistor-color-duo/.docs/instructions.append.md

@@ -0,0 +1,8 @@
+# Instruction append
+
+## Reserved Addresses
+
+The buffer for the first string uses bytes 1024-2047 of linear memory.
+The buffer for the second string uses bytes 2048-3071 of linear memory.
+
+You should not have to modify these buffers or allocate additional memory.

exercises/practice/resistor-color-duo/.docs/instructions.md

@@ -0,0 +1,33 @@
+# 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.

exercises/practice/resistor-color-duo/.eslintrc

@@ -0,0 +1,18 @@
+{
+  "root": true,
+  "extends": "@exercism/eslint-config-javascript",
+  "env": {
+    "jest": true
+  },
+  "overrides": [
+    {
+      "files": [
+        "*.spec.js"
+      ],
+      "excludedFiles": [
+        "custom.spec.js"
+      ],
+      "extends": "@exercism/eslint-config-javascript/maintainers"
+    }
+  ]
+}

exercises/practice/resistor-color-duo/.meta/config.json

@@ -0,0 +1,28 @@
+{
+  "authors": [
+    "keiravillekode"
+  ],
+  "files": {
+    "solution": [
+      "resistor-color-duo.wat"
+    ],
+    "test": [
+      "resistor-color-duo.spec.js"
+    ],
+    "example": [
+      ".meta/proof.ci.wat"
+    ],
+    "invalidator": [
+      "package.json"
+    ]
+  },
+  "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",
+  "custom": {
+    "version.tests.compatibility": "jest-27",
+    "flag.tests.task-per-describe": false,
+    "flag.tests.may-run-long": false,
+    "flag.tests.includes-optional": false
+  }
+}

exercises/practice/resistor-color-duo/.meta/proof.ci.wat

@@ -0,0 +1,90 @@
+(module
+  (memory (export "mem") 1)
+
+  (global $C i32 (i32.const 67))
+  (global $G i32 (i32.const 71))
+  (global $O i32 (i32.const 79))
+  (global $R i32 (i32.const 82))
+  (global $V i32 (i32.const 86))
+  (global $W i32 (i32.const 87))
+  (global $Y i32 (i32.const 89))
+
+  ;;
+  ;; Given a valid resistor color, returns the associated value
+  ;;
+  ;; @param {i32} offset - offset into the color buffer
+  ;; @param {i32} len - length of the color string
+  ;;
+  ;; @returns {i32} - the associated value
+  ;;
+  (func $colorCode (param $offset i32) (param $len i32) (result i32)
+    (local $first i32)
+    (local $fourth i32)
+
+    ;; First letter in color buffer, forced to upper case
+    (local.set $first (i32.and
+                        (i32.load8_u (local.get $offset))
+                        (i32.const 223)
+    ))
+
+    ;; Fourth letter in color buffer, forced to upper case
+    (local.set $fourth (i32.and
+                         (i32.load8_u (i32.add
+                           (local.get $offset)
+                           (i32.const 3)
+                         ))
+                         (i32.const 223)
+    ))
+    (if (i32.eq (local.get $first) (global.get $R)) (then
+      (return (i32.const 2))
+    ))
+    (if (i32.eq (local.get $first) (global.get $O)) (then
+      (return (i32.const 3))
+    ))
+    (if (i32.eq (local.get $first) (global.get $Y)) (then
+      (return (i32.const 4))
+    ))
+    (if (i32.eq (local.get $first) (global.get $V)) (then
+      (return (i32.const 7))
+    ))
+    (if (i32.eq (local.get $first) (global.get $W)) (then
+      (return (i32.const 9))
+    ))
+
+    (if (i32.eq (local.get $first) (global.get $G)) (then
+      (if (i32.eq (local.get $fourth) (global.get $Y)) (then
+        (return (i32.const 8))
+      ))
+      (return (i32.const 5))
+    ))
+
+    (if (i32.eq (local.get $fourth) (global.get $C)) (then
+      (return (i32.const 0))
+    ))
+    (if (i32.eq (local.get $fourth) (global.get $W)) (then
+      (return (i32.const 1))
+    ))
+    (return (i32.const 6))
+  )
+
+  ;;
+  ;; Converts a pair of color codes, as used on resistors, to a numeric value.
+  ;;
+  ;; @param {i32} firstOffset - The offset of the first string in linear memory.
+  ;; @param {i32} firstLength - The length of the first string in linear memory.
+  ;; @param {i32} secondOffset - The offset of the second string in linear memory.
+  ;; @param {i32} secondLength - The length of the second string in linear memory.
+  ;;
+  ;; @returns {i32} - The numeric value specified by the color codes.
+  ;;
+  (func (export "value")
+    (param $firstOffset i32) (param $firstLength i32) (param $secondOffset i32) (param $secondLength i32) (result i32)
+    (return (i32.add
+              (i32.mul
+                (call $colorCode (local.get $firstOffset) (local.get $firstLength))
+                (i32.const 10)
+              )
+              (call $colorCode (local.get $secondOffset) (local.get $secondLength))
+    ))
+  )
+)

exercises/practice/resistor-color-duo/.meta/tests.toml

@@ -0,0 +1,31 @@
+# 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.
+
+[ce11995a-5b93-4950-a5e9-93423693b2fc]
+description = "Brown and black"
+
+[7bf82f7a-af23-48ba-a97d-38d59406a920]
+description = "Blue and grey"
+
+[f1886361-fdfd-4693-acf8-46726fe24e0c]
+description = "Yellow and violet"
+
+[b7a6cbd2-ae3c-470a-93eb-56670b305640]
+description = "White and red"
+
+[77a8293d-2a83-4016-b1af-991acc12b9fe]
+description = "Orange and orange"
+
+[0c4fb44f-db7c-4d03-afa8-054350f156a8]
+description = "Ignore additional colors"
+
+[4a8ceec5-0ab4-4904-88a4-daf953a5e818]
+description = "Black and brown, one-digit"

exercises/practice/resistor-color-duo/.npmrc

@@ -0,0 +1 @@
+audit=false

exercises/practice/resistor-color-duo/LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2021 Exercism
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

exercises/practice/resistor-color-duo/babel.config.js

@@ -0,0 +1,4 @@
+export default {
+  presets: ["@exercism/babel-preset-javascript"],
+  plugins: [],
+};

exercises/practice/resistor-color-duo/package.json

@@ -0,0 +1,34 @@
+{
+  "name": "@exercism/wasm-resistor-color-duo",
+  "description": "Exercism exercises in WebAssembly.",
+  "type": "module",
+  "private": true,
+  "license": "MIT",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/exercism/wasm",
+    "directory": "exercises/practice/resistor-color-duo"
+  },
+  "jest": {
+    "maxWorkers": 1
+  },
+  "devDependencies": {
+    "@babel/core": "^7.23.3",
+    "@exercism/babel-preset-javascript": "^0.4.0",
+    "@exercism/eslint-config-javascript": "^0.6.0",
+    "@types/jest": "^29.5.8",
+    "@types/node": "^20.9.1",
+    "babel-jest": "^29.7.0",
+    "core-js": "^3.33.2",
+    "eslint": "^8.54.0",
+    "jest": "^29.7.0"
+  },
+  "dependencies": {
+    "@exercism/wasm-lib": "^0.2.0"
+  },
+  "scripts": {
+    "test": "node --experimental-vm-modules node_modules/jest/bin/jest.js ./*",
+    "watch": "node --experimental-vm-modules node_modules/jest/bin/jest.js --watch ./*",
+    "lint": "eslint ."
+  }
+}