Julio Biason
3 years ago
13 changed files with 5434 additions and 0 deletions
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|
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!.meta |
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# Protected or generated |
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.git |
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.vscode |
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# When using npm |
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node_modules/* |
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# Configuration files |
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babel.config.js |
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jest.config.js |
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{ |
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"root": true, |
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"parser": "@typescript-eslint/parser", |
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"parserOptions": { |
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"project": "./tsconfig.json", |
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"ecmaFeatures": { |
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"jsx": true |
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}, |
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"ecmaVersion": 2020, |
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"sourceType": "module" |
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}, |
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"extends": "@exercism/eslint-config-typescript", |
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"env": { |
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"jest": true |
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}, |
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"overrides": [ |
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{ |
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"files": [".meta/proof.ci.ts", ".meta/exemplar.ts", "*.test.ts"], |
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"excludedFiles": ["custom.test.ts"], |
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"extends": "@exercism/eslint-config-typescript/maintainers" |
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} |
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] |
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} |
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{ |
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"blurb": "Given a year, report if it is a leap year.", |
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"authors": ["masters3d"], |
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"contributors": ["DFXLuna", "lukaszklis", "SleeplessByte"], |
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"files": { |
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"solution": ["leap.ts"], |
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"test": ["leap.test.ts"], |
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"example": [".meta/proof.ci.ts"] |
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}, |
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"source": "JavaRanch Cattle Drive, exercise 3", |
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"source_url": "http://www.javaranch.com/leap.jsp" |
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} |
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{"track":"typescript","exercise":"leap","id":"a6d0a1d116ab4ea68fc1e124fd5da622","url":"https://exercism.org/tracks/typescript/exercises/leap","handle":"JBiason","is_requester":true,"auto_approve":false} |
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# Help |
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## Running the tests |
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Execute the tests with: |
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```bash |
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$ yarn test |
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``` |
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## Skipped tests |
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In the test suites all tests but the first have been skipped. |
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Once you get a test passing, you can enable the next one by changing `xit` to |
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`it`. |
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|
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## Submitting your solution |
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You can submit your solution using the `exercism submit leap.ts` command. |
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This command will upload your solution to the Exercism website and print the solution page's URL. |
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It's possible to submit an incomplete solution which allows you to: |
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- See how others have completed the exercise |
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- Request help from a mentor |
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|
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## Need to get help? |
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If you'd like help solving the exercise, check the following pages: |
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- The [TypeScript track's documentation](https://exercism.org/docs/tracks/typescript) |
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- [Exercism's support channel on gitter](https://gitter.im/exercism/support) |
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- The [Frequently Asked Questions](https://exercism.org/docs/using/faqs) |
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|
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Should those resources not suffice, you could submit your (incomplete) solution to request mentoring. |
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|
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To get help if you're having trouble, you can use one of the following resources: |
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- [TypeScript QuickStart](https://www.typescriptlang.org/docs/handbook/release-notes/overview.html) |
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- [ECMAScript 2015 Language Specification](https://www.ecma-international.org/wp-content/uploads/ECMA-262_6th_edition_june_2015.pdf) (pdf) |
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- [Mozilla JavaScript Reference](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference) |
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- [/r/typescript](https://www.reddit.com/r/typescript) is the TypeScript subreddit. |
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- [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. |
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# Leap |
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Welcome to Leap on Exercism's TypeScript Track. |
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If you need help running the tests or submitting your code, check out `HELP.md`. |
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|
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## Instructions |
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Given a year, report if it is a leap year. |
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The tricky thing here is that a leap year in the Gregorian calendar occurs: |
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```text |
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on every year that is evenly divisible by 4 |
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except every year that is evenly divisible by 100 |
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unless the year is also evenly divisible by 400 |
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``` |
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For example, 1997 is not a leap year, but 1996 is. 1900 is not a leap |
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year, but 2000 is. |
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## Notes |
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Though our exercise adopts some very simple rules, there is more to |
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learn! |
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For a delightful, four minute explanation of the whole leap year |
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phenomenon, go watch [this youtube video][video]. |
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[video]: http://www.youtube.com/watch?v=xX96xng7sAE |
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## Source |
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### Created by |
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- @masters3d |
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### Contributed to by |
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- @DFXLuna |
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- @lukaszklis |
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- @SleeplessByte |
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### Based on |
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JavaRanch Cattle Drive, exercise 3 - http://www.javaranch.com/leap.jsp |
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module.exports = { |
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presets: [ |
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[ |
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'@babel/preset-env', |
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{ |
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targets: { |
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node: 'current', |
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}, |
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useBuiltIns: 'entry', |
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corejs: '3.17', |
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}, |
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], |
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'@babel/preset-typescript', |
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], |
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plugins: [ |
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'@babel/proposal-class-properties', |
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'@babel/proposal-object-rest-spread', |
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'@babel/plugin-syntax-bigint', |
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], |
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} |
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module.exports = { |
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verbose: true, |
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projects: ['<rootDir>'], |
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testMatch: [ |
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'**/__tests__/**/*.[jt]s?(x)', |
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'**/test/**/*.[jt]s?(x)', |
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'**/?(*.)+(spec|test).[jt]s?(x)', |
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], |
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testPathIgnorePatterns: [ |
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'/(?:production_)?node_modules/', |
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'.d.ts$', |
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'<rootDir>/test/fixtures', |
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'<rootDir>/test/helpers', |
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'__mocks__', |
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], |
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transform: { |
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'^.+\\.[jt]sx?$': 'babel-jest', |
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}, |
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} |
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import { isLeap } from './leap' |
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describe('A leap year', () => { |
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test('year not divisible by 4 in common year', () => { |
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expect(isLeap(2015)).toBe(false) |
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}) |
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test('year divisible by 2, not divisible by 4 in common year', () => { |
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expect(isLeap(1970)).toBe(false) |
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}) |
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test('year divisible by 4, not divisible by 100 in leap year', () => { |
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expect(isLeap(1996)).toBe(true) |
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}) |
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test('year divisible by 4 and 5 is still a leap year', () => { |
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expect(isLeap(1960)).toBe(true) |
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}) |
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test('year divisible by 100, not divisible by 400 in common year', () => { |
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expect(isLeap(2100)).toBe(false) |
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}) |
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test('year divisible by 100 but not by 3 is still not a leap year', () => { |
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expect(isLeap(1900)).toBe(false) |
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}) |
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test('year divisible by 400 in leap year', () => { |
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expect(isLeap(2000)).toBe(true) |
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}) |
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test('year divisible by 400 but not by 125 is still a leap year', () => { |
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expect(isLeap(2400)).toBe(true) |
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}) |
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test('year divisible by 200, not divisible by 400 in common year', () => { |
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expect(isLeap(1800)).toBe(false) |
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}) |
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}) |
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export function isLeap(year: number): boolean { |
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return (year % 4 == 0) && ((year % 100 != 0) || (year % 400 == 0)); |
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} |
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{ |
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"name": "@exercism/typescript-leap", |
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"version": "1.0.0", |
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"description": "Exercism exercises in Typescript.", |
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"private": true, |
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"repository": { |
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"type": "git", |
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"url": "https://github.com/exercism/typescript" |
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}, |
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"devDependencies": { |
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"@babel/core": "^7.15.5", |
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"@babel/plugin-proposal-class-properties": "^7.14.5", |
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"@babel/plugin-proposal-object-rest-spread": "^7.14.7", |
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"@babel/plugin-syntax-bigint": "^7.8.3", |
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"@babel/preset-env": "^7.15.4", |
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"@babel/preset-typescript": "^7.15.0", |
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"@types/jest": "^26.0.24", |
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"@types/node": "^14.17.14", |
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"@exercism/eslint-config-typescript": "^0.3.0", |
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"babel-jest": "^26.6.3", |
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"core-js": "^3.17.2", |
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"eslint": "^7.32.0", |
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"eslint-plugin-import": "^2.24.2", |
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"jest": "^26.6.3", |
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"typescript": "^4.4.2" |
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}, |
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"scripts": { |
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"test": "yarn lint:types && jest --no-cache", |
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"lint": "yarn lint:types && yarn lint:ci", |
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"lint:types": "yarn tsc --noEmit -p .", |
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"lint:ci": "eslint . --ext .tsx,.ts" |
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} |
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} |
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|
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{ |
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"display": "Configuration for Node LTS", |
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"compilerOptions": { |
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"lib": ["es2020"], |
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"module": "commonjs", |
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"target": "es2020", |
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|
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"strict": true, |
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"esModuleInterop": true, |
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"skipLibCheck": true, |
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"forceConsistentCasingInFileNames": true, |
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|
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// Because we'll be using babel |
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// Ensure that Babel can safely transpile files in the TypeScript project |
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"isolatedModules": true |
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}, |
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"include": ["*", ".meta/*"], |
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"exclude": ["node_modules"] |
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} |
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