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Commit af6907c

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programmiri
committed
Add excercise Matrix
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‎matrix/.eslintrc‎

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{
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"root": true,
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"parser": "babel-eslint",
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"parserOptions": {
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"ecmaVersion": 7,
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"sourceType": "module"
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},
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"env": {
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"es6": true,
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"node": true,
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"jest": true
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},
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"extends": [
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"eslint:recommended",
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"plugin:import/errors",
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"plugin:import/warnings"
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],
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"rules": {
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"linebreak-style": "off",
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"import/extensions": "off",
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"import/no-default-export": "off",
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"import/no-unresolved": "off",
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"import/prefer-default-export": "off"
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}
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}

‎matrix/README.md‎

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# Matrix
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Given a string representing a matrix of numbers, return the rows and columns of
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that matrix.
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So given a string with embedded newlines like:
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```text
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9 8 7
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5 3 2
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6 6 7
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```
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representing this matrix:
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```text
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1 2 3
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|---------
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1 | 9 8 7
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2 | 5 3 2
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3 | 6 6 7
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```
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your code should be able to spit out:
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- A list of the rows, reading each row left-to-right while moving
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top-to-bottom across the rows,
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- A list of the columns, reading each column top-to-bottom while moving
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from left-to-right.
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The rows for our example matrix:
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- 9, 8, 7
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- 5, 3, 2
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- 6, 6, 7
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And its columns:
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- 9, 5, 6
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- 8, 3, 6
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- 7, 2, 7
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## Setup
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Go through the setup instructions for Javascript to install the necessary
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dependencies:
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[https://exercism.io/tracks/javascript/installation](https://exercism.io/tracks/javascript/installation)
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## Requirements
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Install assignment dependencies:
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```bash
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$ npm install
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```
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## Making the test suite pass
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Execute the tests with:
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```bash
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$ npm test
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```
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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 `xtest` to
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`test`.
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## Source
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Warmup to the `saddle-points` warmup. [http://jumpstartlab.com](http://jumpstartlab.com)
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## Submitting Incomplete Solutions
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It's possible to submit an incomplete solution so you can see how others have
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completed the exercise.

‎matrix/babel.config.js‎

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module.exports = {
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presets: [
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[
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'@babel/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: false,
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},
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],
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],
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};

‎matrix/matrix.js‎

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//
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// This is only a SKELETON file for the 'Matrix' exercise. It's been provided as a
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// convenience to get you started writing code faster.
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//
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export class Matrix {
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constructor() {
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throw new Error("Remove this statement and implement this function");
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}
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get rows() {
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throw new Error("Remove this statement and implement this function");
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}
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get columns() {
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throw new Error("Remove this statement and implement this function");
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}
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}

‎matrix/matrix.spec.js‎

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import { Matrix } from './matrix';
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describe('Matrix', () => {
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test('extract row from one number matrix', () => {
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expect(new Matrix('1').rows[0]).toEqual([1]);
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});
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xtest('can extract row', () => {
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expect(new Matrix('1 2\n3 4').rows[1]).toEqual([3, 4]);
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});
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xtest('extract row where numbers have different widths', () => {
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expect(new Matrix('1 2\n10 20').rows[1]).toEqual([10, 20]);
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});
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xtest('can extract row from non-square matrix with no corresponding column', () => {
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expect(new Matrix('1 2 3\n4 5 6\n7 8 9\n8 7 6').rows[3]).toEqual([8, 7, 6]);
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});
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xtest('extract column from one number matrix', () => {
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expect(new Matrix('1').columns[0]).toEqual([1]);
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});
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xtest('can extract column', () => {
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expect(new Matrix('1 2 3\n4 5 6\n7 8 9').columns[2]).toEqual([3, 6, 9]);
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});
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xtest('can extract column from non-square matrix with no corresponding row', () => {
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expect(new Matrix('1 2 3 4\n5 6 7 8\n9 8 7 6').columns[3]).toEqual([4, 8, 6]);
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});
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xtest('can extract column from non-square matrix with more columns than rows', () => {
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expect(new Matrix('1 2 3\n4 5 6').columns[2]).toEqual([3, 6]);
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});
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xtest('extract column where numbers have different widths', () => {
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expect(new Matrix('89 1903 3\n18 3 1\n9 4 800').columns[1]).toEqual([1903, 3, 4]);
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});
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});

‎matrix/package.json‎

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{
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"name": "exercism-javascript",
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"description": "Exercism exercises in Javascript.",
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"author": "Katrina Owen",
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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/javascript"
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},
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"devDependencies": {
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"@babel/cli": "^7.5.5",
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"@babel/core": "^7.5.5",
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"@babel/preset-env": "^7.5.5",
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"@types/jest": "^24.0.16",
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"@types/node": "^12.6.8",
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"babel-eslint": "^10.0.2",
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"babel-jest": "^24.8.0",
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"eslint": "^6.1.0",
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"eslint-plugin-import": "^2.18.2",
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"jest": "^24.8.0"
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},
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"jest": {
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"modulePathIgnorePatterns": [
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"package.json"
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]
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},
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"scripts": {
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"test": "jest --no-cache ./*",
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"watch": "jest --no-cache --watch ./*",
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"lint": "eslint .",
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"lint-test": "eslint . && jest --no-cache ./* "
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},
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"license": "MIT",
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"dependencies": {}
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}

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