Convert multiple exercises to named exports (#599)

Instead of default exports

Issue: #436
Remainder: #600

docs/SNIPPET.txt

@@ -1,7 +1,5 @@
-class HelloWorld {
+export class HelloWorld {
   hello() {
     return 'Hello, World!';
   }
-}
-
-export default HelloWorld;
+};

docs/TESTS.md

@@ -28,10 +28,10 @@ $ npm run watch
 
 The skip method instructs the test suite to not run a test, this function could be used also under the aliases: `it.skip(name, fn) or xit(name, fn) or xtest(name, fn)`
 
-- Why they are skipped ? 
+- Why they are skipped ?
 So as to enable users to concentrate on one test at a time and enable one by one as they evolve the solution.
 
-- How to enable them ? 
+- How to enable them ?
 Change xtest to test.
 
 ```javascript
@@ -43,11 +43,11 @@ test('title cased phrases', () => {
 ## Making Your First JavaScript 2015 Module
 
 Usually, tests on this track will load your implementation by importing it as a
-JavaScript module: `import Bob from './bob.js';`. You just
+JavaScript module: `import { Bob } from './bob.js';`. You just
 need to export your implementation from the referenced file, `bob.js`:
 
 ```javascript
-export default class Bob {
+export class Bob {
   hey(message) {
 	//
 	// Your solution to the exercise goes here

exercises/allergies/allergies.spec.js

@@ -1,4 +1,4 @@
-import Allergies from './allergies';
+import { Allergies } from './allergies';
 
 describe('Allergies', () => {
   test('no allergies at all', () => {

exercises/allergies/example.js

@@ -9,7 +9,7 @@ const possibleAllergies = [
   'cats',
 ];
 
-class Allergies {
+export class Allergies {
   constructor(allergenIndex) {
     this.allergenIndex = allergenIndex;
   }
@@ -23,5 +23,3 @@ class Allergies {
     return this.list().some(allergy => allergy === food);
   }
 }
-
-export default Allergies;

exercises/anagram/anagram.spec.js

@@ -1,4 +1,4 @@
-import Anagram from './anagram';
+import { Anagram } from './anagram';
 
 describe('Anagram', () => {
   test('no matches', () => {

exercises/anagram/example.js

@@ -2,7 +2,7 @@ const normalize = str => str.toLowerCase().split('').sort().join();
 const sameWord = (word, candidate) => word.toLowerCase() === candidate.toLowerCase();
 const isAnagram = (word, candiate) => normalize(word) === normalize(candiate);
 
-export default class Anagram {
+export class Anagram {
   constructor(word) {
     this.word = word;
   }

exercises/beer-song/beer-song.spec.js

@@ -1,26 +1,26 @@
-import Beer from './beer-song';
+import { BeerSong } from './beer-song';
 
-describe('Beer', () => {
+describe('BeerSong', () => {
   test('prints an arbitrary verse', () => {
     const expected = `8 bottles of beer on the wall, 8 bottles of beer.
 Take one down and pass it around, 7 bottles of beer on the wall.
 `;
 
-    expect(Beer.verse(8)).toEqual(expected);
+    expect(BeerSong.verse(8)).toEqual(expected);
   });
 
   xtest('handles 1 bottle', () => {
     const expected = `1 bottle of beer on the wall, 1 bottle of beer.
 Take it down and pass it around, no more bottles of beer on the wall.
 `;
-    expect(Beer.verse(1)).toEqual(expected);
+    expect(BeerSong.verse(1)).toEqual(expected);
   });
 
   xtest('handles 0 bottles', () => {
     const expected = `No more bottles of beer on the wall, no more bottles of beer.
 Go to the store and buy some more, 99 bottles of beer on the wall.
 `;
-    expect(Beer.verse(0)).toEqual(expected);
+    expect(BeerSong.verse(0)).toEqual(expected);
   });
 
   xtest('sings several verses', () => {
@@ -33,7 +33,7 @@ Take one down and pass it around, 6 bottles of beer on the wall.
 6 bottles of beer on the wall, 6 bottles of beer.
 Take one down and pass it around, 5 bottles of beer on the wall.
 `;
-    expect(Beer.sing(8, 6)).toEqual(expected);
+    expect(BeerSong.sing(8, 6)).toEqual(expected);
   });
 
   xtest('sings the rest of the verses', () => {
@@ -49,11 +49,11 @@ Take it down and pass it around, no more bottles of beer on the wall.
 No more bottles of beer on the wall, no more bottles of beer.
 Go to the store and buy some more, 99 bottles of beer on the wall.
 `;
-    expect(Beer.sing(3)).toEqual(expected);
+    expect(BeerSong.sing(3)).toEqual(expected);
   });
 
   xtest('sings all the verses', () => {
-    const song = Beer.sing();
+    const song = BeerSong.sing();
     expect(song).toEqual(`99 bottles of beer on the wall, 99 bottles of beer.
 Take one down and pass it around, 98 bottles of beer on the wall.
 

exercises/beer-song/example.js

@@ -27,7 +27,7 @@ function nextBottle(currentVerse) {
   return `${bottles(nextVerse(currentVerse)).toLowerCase()} of beer on the wall.\n`;
 }
 
-class BeerSong {
+export class BeerSong {
   static verse(number) {
     const line1 = `${bottles(number)} of beer on the wall, `;
     const line2 = `${bottles(number).toLowerCase()} of beer.\n`;
@@ -46,5 +46,3 @@ class BeerSong {
     return verses.join('\n');
   }
 }
-
-export default BeerSong;

exercises/binary-search-tree/binary-search-tree.spec.js

@@ -1,4 +1,4 @@
-import BinarySearchTree from './binary-search-tree';
+import { BinarySearchTree } from './binary-search-tree';
 
 function recordAllData(bst) {
   const out = [];

exercises/binary-search-tree/example.js

@@ -1,4 +1,4 @@
-class BinarySearchTree {
+export class BinarySearchTree {
   constructor(data) {
     this.data = data;
     this.left = undefined;
@@ -45,5 +45,3 @@ class BinarySearchTree {
     }
   }
 }
-
-export default BinarySearchTree;

exercises/binary-search/binary-search.spec.js

@@ -1,4 +1,4 @@
-import BinarySearch from './binary-search';
+import { BinarySearch } from './binary-search';
 
 describe('BinarySearch', () => {
   const sortedArray = [1, 2, 3, 4, 5, 6];

exercises/binary-search/example.js

@@ -25,7 +25,7 @@ function recursiveSearch(array, value, start, end) {
   return mid;
 }
 
-class BinarySearch {
+export class BinarySearch {
   constructor(array) {
     if (isSortedArray(array)) {
       this.array = array;
@@ -36,5 +36,3 @@ class BinarySearch {
     return recursiveSearch(this.array, value, 0, this.array.length);
   }
 }
-
-export default BinarySearch;

exercises/binary/binary.spec.js

@@ -1,4 +1,4 @@
-import Binary from './binary';
+import { Binary } from './binary';
 
 describe('binary', () => {
   test('0 is decimal 0', () => expect(new Binary('0').toDecimal()).toEqual(0));

exercises/binary/example.js

@@ -1,6 +1,6 @@
 // classy solution, eh?
 
-class Binary {
+export class Binary {
   constructor(binary) {
     this.binary = binary.match(/^[01]*$/) ? parseInt(binary, 2) : 0;
   }
@@ -10,5 +10,3 @@ class Binary {
     return Number.isNaN(out) ? 0 : out;
   }
 }
-
-export default Binary;

exercises/bowling/bowling.spec.js

@@ -1,4 +1,4 @@
-import Bowling from './bowling';
+import { Bowling } from './bowling';
 
 describe('Bowling', () => {
   describe('Check game can be scored correctly.', () => {

exercises/bowling/example.js

@@ -1,4 +1,4 @@
-export default class Bowling {
+export class Bowling {
   constructor() {
     this.maxPins = 10;
     this.maxFrames = 10;

exercises/change/change.spec.js

@@ -1,4 +1,4 @@
-import Change from './change';
+import { Change } from './change';
 
 describe('Change', () => {
   test('test change for 1 cent', () => {

exercises/change/example.js

@@ -34,7 +34,7 @@ class Candidate {
   }
 }
 
-export default class Change {
+export class Change {
   constructor() {
     this.candidates = [];
   }

exercises/clock/clock.spec.js

@@ -1,4 +1,4 @@
-import at from './clock';
+import { at } from './clock';
 
 describe('Clock', () => {
   describe('Creating a new clock with an initial time', () => {

exercises/clock/example.js

@@ -1,4 +1,4 @@
-export default function (hour, minute) {
+export const at = (hour, minute) => {
   const MINUTESPERDAY = 1440;
   const HOURSPERDAY = 24;
 
@@ -38,4 +38,4 @@ export default function (hour, minute) {
       && clock.minute === otherClock.clock.minute
     ),
   };
-}
+};

exercises/complex-numbers/complex-numbers.spec.js

@@ -1,4 +1,4 @@
-import ComplexNumber from './complex-numbers.js';
+import { ComplexNumber } from './complex-numbers.js';
 
 describe('Complex numbers', () => {
   test('Real part of a purely real number', () => {

exercises/complex-numbers/example.js

@@ -1,4 +1,4 @@
-export default class ComplexNumber {
+export class ComplexNumber {
   constructor(real, imag) {
     this.real = real;
     this.imag = imag;

exercises/connect/connect.spec.js

@@ -1,4 +1,4 @@
-import Board from './connect';
+import { Board } from './connect';
 
 describe('Judging a game of connect', () => {
   test('an empty board has no winner', () => {

exercises/connect/example.js

@@ -2,7 +2,7 @@
  * "Player O" plays from top to bottom, "Player X" plays from left to right.
  * @param board
  */
-export default class {
+export class Board {
   constructor(board) {
     this.board = board.map(b => [...b]);
   }

exercises/crypto-square/crypto-square.spec.js

@@ -1,4 +1,4 @@
-import Crypto from './crypto-square';
+import { Crypto } from './crypto-square';
 
 describe('Crypto', () => {
   test('normalize strange characters', () => {

exercises/crypto-square/example.js

@@ -1,4 +1,4 @@
-export default class Square {
+export class Crypto {
   constructor(input) {
     this.input = input;
   }

exercises/custom-set/custom-set.spec.js

@@ -1,4 +1,4 @@
-import CustomSet from './custom-set';
+import { CustomSet } from './custom-set';
 
 describe('CustomSet', () => {
   describe('empty: returns true if the set contains no elements', () => {

exercises/custom-set/example.js

@@ -1,4 +1,4 @@
-export default class CustomSet {
+export class CustomSet {
   constructor(data = []) {
     this.data = {};
     data.forEach(el => this.add(el));

exercises/diamond/diamond.spec.js

@@ -1,4 +1,4 @@
-import Diamond from './diamond.js';
+import { Diamond } from './diamond.js';
 
 describe('Make diamond function', () => {
   const diamond = new Diamond();

exercises/diamond/example.js

@@ -1,4 +1,4 @@
-export default class Diamond {
+export class Diamond {
   makeDiamond(input) {
     const inputIndex = input.charCodeAt() - 65;
     let output = '';

exercises/difference-of-squares/difference-of-squares.spec.js

@@ -1,4 +1,4 @@
-import Squares from './difference-of-squares';
+import { Squares } from './difference-of-squares';
 
 describe('difference-of-squares', () => {
   const squares1 = new Squares(1);

exercises/difference-of-squares/example.js

@@ -1,4 +1,4 @@
-export default class Squares {
+export class Squares {
   constructor(max) {
     this.max = max;
   }

exercises/diffie-hellman/diffie-hellman.spec.js

@@ -1,5 +1,5 @@
 /* eslint-disable no-new */
-import DiffieHellman from './diffie-hellman';
+import { DiffieHellman } from './diffie-hellman';
 
 describe('diffie-hellman', () => {
   const p = 23;

exercises/etl/etl.spec.js

@@ -1,4 +1,4 @@
-import transform from './etl';
+import { transform } from './etl';
 
 describe('Transform', () => {
   test('transforms one value', () => {

exercises/etl/example.js

@@ -1,4 +1,4 @@
-function transform(input) {
+export const transform = (input) => {
   const output = {};
 
   Object.keys(input).forEach((key) => {
@@ -11,6 +11,4 @@ function transform(input) {
   });
 
   return output;
-}
-
-export default transform;
+};

exercises/flatten-array/example.js

@@ -1,4 +1,4 @@
-export default class Flattener {
+export class Flattener {
   flatten(arr) {
     return arr
       .reduce((acc, el) => (Array.isArray(el)

exercises/flatten-array/flatten-array.spec.js

@@ -1,4 +1,4 @@
-import Flattener from './flatten-array.js';
+import { Flattener } from './flatten-array.js';
 
 describe('FlattenArray', () => {
   const flattener = new Flattener();

exercises/food-chain/example.js

@@ -1,4 +1,4 @@
-export default class Song {
+export class Song {
   /**
    * @param {Number} number
    * verse number

exercises/food-chain/food-chain.spec.js

@@ -1,4 +1,4 @@
-import Song from './food-chain';
+import { Song } from './food-chain';
 
 describe('Food Chain', () => {
   let song;

exercises/forth/example.js

@@ -1,4 +1,4 @@
-class Forth {
+export class Forth {
   constructor(){
     this.stack = [];
     this.commands = Forth.basicCommands();
@@ -59,5 +59,3 @@ class Forth {
     };
   }
 }
-
-export default Forth;

exercises/forth/forth.spec.js

@@ -1,4 +1,4 @@
-import Forth from './forth';
+import { Forth } from './forth';
 
 describe('Forth', () => {
   let forth;