Add exercise resistor color

config.json

@@ -52,6 +52,17 @@
         "logic"
       ]
     },
+    {
+      "slug": "resistor-color",
+      "uuid": "c6f41fd5-584c-46ca-b3c5-6a0825446bf4",
+      "core": true,
+      "unlocked_by": null,
+      "difficulty": 1,
+      "topics": [
+        "arrays",
+        "strings"
+      ]
+    },
     {
       "slug": "rna-transcription",
       "uuid": "b4db381f-1c99-44c6-948c-c8892d77823e",

exercises/resistor-color/.eslintignore

@@ -0,0 +1,10 @@
+bin/*
+dist/*
+docs/*
+node_modules/*
+production_node_modules/*
+test/fixtures/*
+tmp/*
+
+babel.config.js
+jest.config.js

exercises/resistor-color/.eslintrc

@@ -0,0 +1,86 @@
+{
+  "root": true,
+  "parser": "@typescript-eslint/parser",
+  "parserOptions": {
+    "project": "./tsconfig.json",
+    "ecmaFeatures": {
+      "jsx": true
+    },
+    "ecmaVersion": 2018,
+    "sourceType": "module"
+  },
+  "env": {
+    "browser": true,
+    "es6": true
+  },
+  "extends": [
+    "eslint:recommended",
+    "plugin:@typescript-eslint/eslint-recommended",
+    "plugin:@typescript-eslint/recommended"
+  ],
+  "globals": {
+    "Atomics": "readonly",
+    "SharedArrayBuffer": "readonly"
+  },
+  "plugins": [
+    "@typescript-eslint"
+  ],
+  "rules": {
+    // Code style not forced upon the student
+    "@typescript-eslint/array-type": "off",
+
+    // Prevent bugs
+    "@typescript-eslint/explicit-function-return-type": [
+      "warn", {
+        "allowExpressions": false,
+        "allowTypedFunctionExpressions": true,
+        "allowHigherOrderFunctions": true
+      }
+    ],
+
+    // Code style not forced upon the student
+    "@typescript-eslint/explicit-member-accessibility": "off",
+
+    // Code style not forced upon the student
+    "@typescript-eslint/indent": "off",
+
+    "@typescript-eslint/no-inferrable-types": [
+      "error", {
+        "ignoreParameters": true
+      }
+    ],
+
+    // Code style not forced upon the student
+    "@typescript-eslint/member-delimiter-style": "off",
+
+    // Code style not forced upon the student
+    "@typescript-eslint/no-non-null-assertion": "off",
+
+     // Only disallow readonly without an access modifier
+    "@typescript-eslint/no-parameter-properties": [
+      "warn", {
+        "allows": [
+          "private", "protected", "public",
+          "private readonly", "protected readonly", "public readonly"
+        ]
+      }
+    ],
+
+    // Covered by the tsc compiler (noUnusedLocals)
+    "@typescript-eslint/no-unused-vars": "off",
+
+     // Prevent bugs, not styling
+    "@typescript-eslint/no-use-before-define": [
+      "error", {
+        "functions": false,
+        "typedefs": false
+      }
+    ],
+
+     // Always disable base-rule
+    "semi": "off",
+
+     // Code style not forced upon student
+    "@typescript-eslint/semi": "off"
+  }
+}

exercises/resistor-color/README.md

@@ -0,0 +1,57 @@
+# Resistor Color
+
+Resistors have color coded bands, where each color maps to a number. The first 2 bands of a resistor have a simple encoding scheme: each color maps to a single number.
+
+These 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
+
+Mnemonics map the colors to the numbers, that, when stored as an array, happen to map to their index in the array: Better Be Right Or Your Great Big Values Go Wrong.
+
+More information on the color encoding of resistors can be found in the [Electronic color code Wikipedia article](https://en.wikipedia.org/wiki/Electronic_color_code)
+
+## Setup
+
+Go through the setup instructions for TypeScript to install the necessary
+dependencies:
+
+[https://exercism.io/tracks/typescript/installation](https://exercism.io/tracks/typescript/installation)
+
+## Requirements
+
+Install assignment dependencies:
+
+```bash
+$ yarn install
+```
+
+## Making the test suite pass
+
+Execute the tests with:
+
+```bash
+$ yarn test
+```
+
+In the test suites all tests but the first have been skipped.
+
+Once you get a test passing, you can enable the next one by changing `xit` to
+`it`.
+
+## Source
+
+https://github.com/exercism/problem-specifications/issues/1458
+
+## Submitting Incomplete Solutions
+
+It's possible to submit an incomplete solution so you can see how others have
+completed the exercise.

exercises/resistor-color/babel.config.js

@@ -0,0 +1,20 @@
+module.exports = {
+  presets: [
+    [
+      "@babel/preset-env",
+      {
+        targets: {
+          node: "current",
+        },
+        useBuiltIns: "entry",
+        corejs: 3,
+      },
+    ],
+    "@babel/preset-typescript",
+  ],
+  plugins: [
+    "@babel/proposal-class-properties",
+    "@babel/proposal-object-rest-spread",
+    "@babel/plugin-syntax-bigint",
+  ],
+}

exercises/resistor-color/jest.config.js

@@ -0,0 +1,19 @@
+module.exports = {
+  verbose: true,
+  projects: ["<rootDir>"],
+  testMatch: [
+    "**/__tests__/**/*.[jt]s?(x)",
+    "**/test/**/*.[jt]s?(x)",
+    "**/?(*.)+(spec|test).[jt]s?(x)",
+  ],
+  testPathIgnorePatterns: [
+    "/(?:production_)?node_modules/",
+    ".d.ts$",
+    "<rootDir>/test/fixtures",
+    "<rootDir>/test/helpers",
+    "__mocks__",
+  ],
+  transform: {
+    "^.+\\.[jt]sx?$": "babel-jest",
+  },
+}

exercises/resistor-color/package.json

@@ -0,0 +1,34 @@
+{
+  "name": "@exercism/typescript",
+  "description": "Exercism exercises in Typescript.",
+  "private": true,
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/exercism/typescript"
+  },
+  "devDependencies": {
+    "@babel/core": "^7.12.10",
+    "@babel/plugin-proposal-class-properties": "^7.12.1",
+    "@babel/plugin-proposal-object-rest-spread": "^7.12.1",
+    "@babel/plugin-syntax-bigint": "^7.8.3",
+    "@babel/preset-env": "^7.12.10",
+    "@babel/preset-typescript": "^7.12.7",
+    "@types/jest": "^26.0.19",
+    "@types/node": "^14.14.13",
+    "@typescript-eslint/eslint-plugin": "^4.9.1",
+    "@typescript-eslint/parser": "^4.9.1",
+    "babel-jest": "^26.6.3",
+    "core-js": "^3.8.1",
+    "eslint": "^7.15.0",
+    "eslint-plugin-import": "^2.22.1",
+    "jest": "^26.6.3",
+    "typescript": "^4.1.3"
+  },
+  "scripts": {
+    "test": "yarn lint:types && jest --no-cache",
+    "lint": "yarn lint:types && yarn lint:ci",
+    "lint:types": "yarn tsc --noEmit -p .",
+    "lint:ci": "eslint . --ext .tsx,.ts"
+  },
+  "dependencies": {}
+}

exercises/resistor-color/resistor-color.example.ts

@@ -0,0 +1,3 @@
+export const COLORS = ["black", "brown", "red", "orange", "yellow", "green", "blue", "violet", "grey", "white"]
+
+export const colorCode = (color: string): number => COLORS.indexOf(color)

exercises/resistor-color/resistor-color.test.ts

@@ -0,0 +1,21 @@
+import { colorCode, COLORS } from './resistor-color'
+
+describe('color code', () => {
+  it('Black', () => {
+    expect(colorCode('black')).toEqual(0)
+  })
+
+  xit('White', () => {
+    expect(colorCode('white')).toEqual(9)
+  })
+
+  xit('Orange', () => {
+    expect(colorCode('orange')).toEqual(3)
+  })
+})
+
+describe('Colors', () => {
+  xit('returns all colors', () => {
+    expect(COLORS).toEqual(["black", "brown", "red", "orange", "yellow", "green", "blue", "violet", "grey", "white"])
+  })
+})

exercises/resistor-color/resistor-color.ts

@@ -0,0 +1,5 @@
+export const colorCode = () => {
+    throw new Error('Delete this line and implement this function')
+}
+
+export const COLORS = undefined;

exercises/resistor-color/tsconfig.json

@@ -0,0 +1,65 @@
+{
+  "compilerOptions": {
+    /* Basic Options */
+    "target": "es2017",                       /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017','ES2018' or 'ESNEXT'. */
+    "module": "commonjs",                     /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */
+    "lib": ["esnext", "es2016", "es2017"],    /* Specify library files to be included in the compilation. */
+    // "allowJs": true,                       /* Allow javascript files to be compiled. */
+    // "checkJs": true,                       /* Report errors in .js files. */
+    // "jsx": "preserve",                     /* Specify JSX code generation: 'preserve', 'react-native', or 'react'. */
+    // "declaration": true,                   /* Generates corresponding '.d.ts' file. */
+    // "declarationMap": true,                /* Generates a sourcemap for each corresponding '.d.ts' file. */
+    // "sourceMap": true,                        /* Generates corresponding '.map' file. */
+    // "outFile": "./",                       /* Concatenate and emit output to single file. */
+    // "outDir": "./build",                      /* Redirect output structure to the directory. */
+    // "rootDirs": ["./"],                    /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */
+    // "composite": true,                     /* Enable project compilation */
+    // "removeComments": true,                /* Do not emit comments to output. */
+    "noEmit": true,                        /* Do not emit outputs. */
+    // "importHelpers": true,                 /* Import emit helpers from 'tslib'. */
+    // "downlevelIteration": true,            /* Provide full support for iterables in 'for-of', spread, and destructuring when targeting 'ES5' or 'ES3'. */
+    "isolatedModules": true,                  /* Transpile each file as a separate module (similar to 'ts.transpileModule'). */
+    // "noEmitOnError": true,                    /* Do not emit outputs when compilation fails. */
+
+    /* Strict Type-Checking Options */
+    "strict": true,                           /* Enable all strict type-checking options. */
+    // "noImplicitAny": true,                 /* Raise error on expressions and declarations with an implied 'any' type. */
+    // "strictNullChecks": true,              /* Enable strict null checks. */
+    // "strictFunctionTypes": true,           /* Enable strict checking of function types. */
+    // "strictBindCallApply": true,           /* Enable strict 'bind', 'call', and 'apply' methods on functions. */
+    // "strictPropertyInitialization": true,  /* Enable strict checking of property initialization in classes. */
+    // "noImplicitThis": true,                /* Raise error on 'this' expressions with an implied 'any' type. */
+    // "alwaysStrict": true,                  /* Parse in strict mode and emit "use strict" for each source file. */
+
+    /* Additional Checks */
+    // "noUnusedLocals": true,                /* Report errors on unused locals. */
+    "noUnusedParameters": true,               /* Report errors on unused parameters. */
+    // "noImplicitReturns": true,             /* Report error when not all code paths in function return a value. */
+    // "noFallthroughCasesInSwitch": true,    /* Report errors for fallthrough cases in switch statement. */
+
+    /* Module Resolution Options */
+    "moduleResolution": "node",               /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */
+    // "baseUrl": "./",                       /* Base directory to resolve non-absolute module names. */
+    // "paths": { "~src/*": ["./src/*"] },                           /* A series of entries which re-map imports to lookup locations relative to the 'baseUrl'. */
+    // "rootDirs": [],                        /* List of root folders whose combined content represents the structure of the project at runtime. */
+    // "typeRoots": [],                       /* List of folders to include type definitions from. */
+    // "types": [],                           /* Type declaration files to be included in compilation. */
+    "allowSyntheticDefaultImports": true,     /* Allow default imports from modules with no default export. This does not affect code emit, just typechecking. */
+    "esModuleInterop": true                   /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
+    // "preserveSymlinks": true,              /* Do not resolve the real path of symlinks. */
+
+    /* Source Map Options */
+    // "sourceRoot": "",                      /* Specify the location where debugger should locate TypeScript files instead of source locations. */
+    // "mapRoot": "",                         /* Specify the location where debugger should locate map files instead of generated locations. */
+    // "inlineSourceMap": true,               /* Emit a single file with source maps instead of having a separate file. */
+    // "inlineSources": true,                 /* Emit the source alongside the sourcemaps within a single file; requires '--inlineSourceMap' or '--sourceMap' to be set. */
+
+    /* Experimental Options */
+    // "experimentalDecorators": true,        /* Enables experimental support for ES7 decorators. */
+    // "emitDecoratorMetadata": true,         /* Enables experimental support for emitting type metadata for decorators. */
+  },
+  "compileOnSave": true,
+  "exclude": [
+    "node_modules"
+  ]
+}