10: Allergies.

allergies/.eslintignore

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+!.meta
+
+# Protected or generated
+.git
+.vscode
+
+# When using npm
+node_modules/*
+
+# Configuration files
+.eslintrc.cjs
+babel.config.cjs
+jest.config.cjs

allergies/.eslintrc.cjs

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+module.exports = {
+  root: true,
+  parserOptions: {
+    tsconfigRootDir: __dirname,
+    project: ['./tsconfig.json'],
+  },
+  overrides: [
+    // Student provided files
+    {
+      files: ['*.ts'],
+      excludedFiles: ['.meta/proof.ci.ts', '.meta/exemplar.ts', '*.test.ts'],
+      extends: '@exercism/eslint-config-typescript',
+    },
+    // Exercism given tests
+    {
+      files: ['*.test.ts'],
+      excludedFiles: ['custom.test.ts'],
+      env: {
+        jest: true,
+      },
+      extends: '@exercism/eslint-config-typescript/maintainers',
+    },
+    // Student provided tests
+    {
+      files: ['custom.test.ts'],
+      env: {
+        jest: true,
+      },
+      extends: '@exercism/eslint-config-typescript',
+    },
+    // Exercism provided files
+    {
+      files: ['.meta/proof.ci.ts', '.meta/exemplar.ts', '*.test.ts'],
+      excludedFiles: ['custom.test.ts'],
+      extends: '@exercism/eslint-config-typescript/maintainers',
+    },
+  ],
+}

allergies/.exercism/config.json

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+{
+  "authors": [
+    "CRivasGomez"
+  ],
+  "contributors": [
+    "masters3d",
+    "SleeplessByte"
+  ],
+  "files": {
+    "solution": [
+      "allergies.ts"
+    ],
+    "test": [
+      "allergies.test.ts"
+    ],
+    "example": [
+      ".meta/proof.ci.ts"
+    ]
+  },
+  "blurb": "Given a person's allergy score, determine whether or not they're allergic to a given item, and their full list of allergies.",
+  "source": "Exercise by the JumpstartLab team for students at The Turing School of Software and Design.",
+  "source_url": "https://turing.edu"
+}

allergies/.exercism/metadata.json

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+{"track":"typescript","exercise":"allergies","id":"3a845fcff99f4fd69cf0d78c3aad5e9f","url":"https://exercism.org/tracks/typescript/exercises/allergies","handle":"Fairgame","is_requester":true,"auto_approve":false}

allergies/HELP.md

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+# Help
+
+## Running the tests
+
+Execute the tests with:
+
+```bash
+$ yarn test
+```
+
+## Skipped tests
+
+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`.
+
+## Submitting your solution
+
+You can submit your solution using the `exercism submit allergies.ts` 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 [TypeScript track's documentation](https://exercism.org/docs/tracks/typescript)
+- The [TypeScript track's programming category on the forum](https://forum.exercism.org/c/programming/typescript)
+- [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.
+
+To get help if you're having trouble, you can use one of the following resources:
+
+- [TypeScript QuickStart](https://www.typescriptlang.org/docs/handbook/release-notes/overview.html)
+- [ECMAScript 2015 Language Specification](https://www.ecma-international.org/wp-content/uploads/ECMA-262_6th_edition_june_2015.pdf) (pdf)
+- [Mozilla JavaScript Reference](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference)
+- [/r/typescript](https://www.reddit.com/r/typescript) is the TypeScript subreddit.
+- [StackOverflow](https://stackoverflow.com/questions/tagged/typescript) can be used to search for your problem and see if it has been answered already. You can also ask and answer questions.

allergies/README.md

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+# Allergies
+
+Welcome to Allergies on Exercism's TypeScript Track.
+If you need help running the tests or submitting your code, check out `HELP.md`.
+
+## Instructions
+
+Given a person's allergy score, determine whether or not they're allergic to a given item, and their full list of allergies.
+
+An allergy test produces a single numeric score which contains the information about all the allergies the person has (that they were tested for).
+
+The list of items (and their value) that were tested are:
+
+- eggs (1)
+- peanuts (2)
+- shellfish (4)
+- strawberries (8)
+- tomatoes (16)
+- chocolate (32)
+- pollen (64)
+- cats (128)
+
+So if Tom is allergic to peanuts and chocolate, he gets a score of 34.
+
+Now, given just that score of 34, your program should be able to say:
+
+- Whether Tom is allergic to any one of those allergens listed above.
+- All the allergens Tom is allergic to.
+
+Note: a given score may include allergens **not** listed above (i.e. allergens that score 256, 512, 1024, etc.).
+Your program should ignore those components of the score.
+For example, if the allergy score is 257, your program should only report the eggs (1) allergy.
+
+## Source
+
+### Created by
+
+- @CRivasGomez
+
+### Contributed to by
+
+- @masters3d
+- @SleeplessByte
+
+### Based on
+
+Exercise by the JumpstartLab team for students at The Turing School of Software and Design. - https://turing.edu

allergies/allergies.test.ts

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+import { Allergies } from './allergies'
+
+describe('allergicTo', () => {
+  it('no allergies means not allergic', () => {
+    const allergies = new Allergies(0)
+
+    expect(allergies.allergicTo('peanuts')).toBeFalsy()
+    expect(allergies.allergicTo('cats')).toBeFalsy()
+    expect(allergies.allergicTo('strawberries')).toBeFalsy()
+  })
+
+  xit('is allergic to eggs', () => {
+    const allergies = new Allergies(1)
+
+    expect(allergies.allergicTo('eggs')).toBeTruthy()
+  })
+
+  xit('allergic to eggs in addition to other stuff', () => {
+    const allergies = new Allergies(5)
+
+    expect(allergies.allergicTo('eggs')).toBeTruthy()
+    expect(allergies.allergicTo('shellfish')).toBeTruthy()
+    expect(allergies.allergicTo('strawberries')).toBeFalsy()
+  })
+})
+
+describe('list', () => {
+  xit('no allergies at all', () => {
+    const allergies = new Allergies(0)
+    const expected: string[] = []
+
+    expect(allergies.list()).toEqual(expected)
+  })
+
+  xit('allergic to just eggs', () => {
+    const allergies = new Allergies(1)
+    const expected = ['eggs']
+
+    expect(allergies.list()).toEqual(expected)
+  })
+
+  xit('allergic to just peanuts', () => {
+    const allergies = new Allergies(2)
+    const expected = ['peanuts']
+
+    expect(allergies.list()).toEqual(expected)
+  })
+
+  xit('allergic to just strawberries', () => {
+    const allergies = new Allergies(8)
+    const expected = ['strawberries']
+
+    expect(allergies.list()).toEqual(expected)
+  })
+
+  xit('allergic to eggs and peanuts', () => {
+    const allergies = new Allergies(3)
+    const expected = ['eggs', 'peanuts']
+
+    expect(allergies.list()).toEqual(expected)
+  })
+
+  xit('allergic to more than eggs but not peanuts', () => {
+    const allergies = new Allergies(5)
+    const expected = ['eggs', 'shellfish']
+
+    expect(allergies.list()).toEqual(expected)
+  })
+
+  xit('allergic to lots of stuff', () => {
+    const allergies = new Allergies(248)
+    const expected = ['strawberries', 'tomatoes', 'chocolate', 'pollen', 'cats']
+
+    expect(allergies.list()).toEqual(expected)
+  })
+
+  xit('allergic to everything', () => {
+    const allergies = new Allergies(255)
+    const expected = [
+      'eggs',
+      'peanuts',
+      'shellfish',
+      'strawberries',
+      'tomatoes',
+      'chocolate',
+      'pollen',
+      'cats',
+    ]
+
+    expect(allergies.list()).toEqual(expected)
+  })
+
+  xit('ignore non allergen score parts', () => {
+    const allergies = new Allergies(509)
+    const expected = [
+      'eggs',
+      'shellfish',
+      'strawberries',
+      'tomatoes',
+      'chocolate',
+      'pollen',
+      'cats',
+    ]
+
+    expect(allergies.list()).toEqual(expected)
+  })
+
+  xit('ignore non allergen score parts, without highest valid score', () => {
+    const allergies = new Allergies(257)
+    const expected = ['eggs']
+
+    expect(allergies.list()).toEqual(expected)
+  })
+})

allergies/allergies.ts

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+type allergyMap = { [key: number]: string };
+
+let allergies:allergyMap = {
+    1: 'eggs',
+    2: 'peanuts',
+    4: 'shellfish',
+    8: 'strawberries',
+    16: 'tomatoes',
+    32: 'chocolate',
+    64: 'pollen',
+    128: 'cats',
+};
+
+export class Allergies {
+    private ids = 0;
+
+    constructor(allergenIndex: number) {
+        allergenIndex &= 255;
+        let i = 1;
+        while (i <= 128) {
+            if ((i & allergenIndex) !== 0) {
+                this.ids |= i;
+            }
+            i <<= 1;
+        }
+    }
+
+    public list(): string[] {
+        let i = 1;
+        let res: string[] = [];
+        while (i <= 128) {
+            if ((i & this.ids) !== 0) {
+                res.push(allergies[i])
+            }
+            i <<= 1;
+        }
+        return res;
+    }
+
+    public allergicTo(allergen: string): boolean {
+        return this.list().indexOf(allergen) >= 0;
+    }
+}

allergies/babel.config.cjs

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+module.exports = {
+  presets: ['@exercism/babel-preset-typescript'],
+  plugins: [],
+}

allergies/jest.config.cjs

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+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',
+  },
+}

allergies/package.json

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+{
+  "name": "@exercism/typescript-allergies",
+  "version": "1.0.0",
+  "description": "Exercism exercises in Typescript.",
+  "private": true,
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/exercism/typescript"
+  },
+  "type": "module",
+  "engines": {
+    "node": "^18.16.0 || >=20.0.0"
+  },
+  "devDependencies": {
+    "@exercism/babel-preset-typescript": "^0.4.0",
+    "@exercism/eslint-config-typescript": "^0.5.0",
+    "@types/jest": "^29.5.2",
+    "@types/node": "~18.16.16",
+    "babel-jest": "^29.5.0",
+    "core-js": "~3.30.2",
+    "eslint": "^8.42.0",
+    "jest": "^29.5.0",
+    "typescript": "~5.0.4"
+  },
+  "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"
+  },
+  "packageManager": "yarn@3.6.4"
+}

allergies/tsconfig.json

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+{
+  "display": "Configuration for Exercism TypeScript Exercises",
+  "compilerOptions": {
+    // Allows you to use the newest syntax, and have access to console.log
+    // https://www.typescriptlang.org/tsconfig#lib
+    "lib": ["ESNEXT", "dom"],
+    // Make sure typescript is configured to output ESM
+    // https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c#how-can-i-make-my-typescript-project-output-esm
+    "module": "ES2020",
+    // Since this project is using babel, TypeScript may target something very
+    // high, and babel will make sure it runs on your local Node version.
+    // https://babeljs.io/docs/en/
+    "target": "ESNext", // ESLint doesn't support this yet: "es2022",
+
+    "strict": true,
+    "esModuleInterop": true,
+    "skipLibCheck": true,
+    "forceConsistentCasingInFileNames": true,
+
+    // Because we'll be using babel: ensure that Babel can safely transpile
+    // files in the TypeScript project.
+    //
+    // https://babeljs.io/docs/en/babel-plugin-transform-typescript/#caveats
+    "isolatedModules": true
+  },
+  "include": ["*.ts", "*.tsx", ".meta/*.ts", ".meta/*.tsx"],
+  "exclude": ["node_modules"]
+}