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chapter 03: [Stacks]
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‎.eslintrc.json

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"class-methods-use-this": 0,
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"no-plusplus": 0,
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"arrow-parens": 0,
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"no-console": 0
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"no-console": 0,
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"import/prefer-default-export": 0,
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"no-underscore-dangle": 0
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‎.gitignore

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coverage
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coverage.lcov
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mochawesome-report/*
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dist/js/*
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dist/ts/*

‎README.md

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[![Build Status](https://travis-ci.org/loiane/javascript-datastructures-algorithms.svg?branch=third-edition)](https://travis-ci.org/loiane/javascript-datastructures-algorithms)
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[![codecov](https://codecov.io/gh/loiane/javascript-datastructures-algorithms/branch/third-edition/graph/badge.svg)](https://codecov.io/gh/loiane/javascript-datastructures-algorithms)
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Source code of **Learning JavaScript Data Structures and Algorithms** book.
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Source code of **Learning JavaScript Data Structures and Algorithms** book, third edition.
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Work in Progress.
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## List of available chapters:
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* 01: [JavaScript, ECMAScript and TypeScript: a quick overview](https://github.com/loiane/javascript-datastructures-algorithms/tree/third-edition/examples/chapter01)
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* 02: [Arrays](https://github.com/loiane/javascript-datastructures-algorithms/tree/third-edition/examples/chapter02)
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* 03: [Stacks](https://github.com/loiane/javascript-datastructures-algorithms/tree/third-edition/examples/chapter03)
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## Thrid Edition Updates
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* Algorithms using ES2015+
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* Creation of a Data Structure and Algorithms library that can be used in the browser or with Node.js
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* Algorithms tested with Mocha + Chai (test code available in `test` directory)
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* TypeScript version of the source code included
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## Installing and running the book examples With Node
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* To see the examples, run `http-server html` or `npm run serve`. Open your browser `http:\\localhost:8080` to see the book examples
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* Or `cd html/chapter01` and run each javascript file with node: `node 02-Variables`
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## Running the book examples in the browser
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## Running the examples in the browser
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* Right click on the html file you would like to see the examples, right click and 'Open with Chrome (or any other browser)'
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## List of all available examples:
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* 01: JavaScript, ECMAScript and TypeScript: a quick overview
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- 01-HelloWorld
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- 02-Variables
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- 03-Operators
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- 04-TruthyFalsy
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- 05-EqualsOperators
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- 06-ConditionalStatements
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- 07-Loops
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- 08-Functions
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- 10-ObjectOrientedJS
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- 11-ES6letconst
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- 12-Es6StringTemplates
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- 13-ES6ArrowFunctions
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- 14-ES6ParameterHandling
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- 15-ES6EnhancedObjectProperties
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- 16-ES6Classes
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- 17-TypeScript
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* 02: Arrays
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- 01-Introduction
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- 02-CreatingAndInitialingArrays
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- 03-AddingRemovingElements
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- 04-TwoDimensionalMultiDimensional
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- 05-ArrayMethods
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- 06-ES6Methods
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- 07-TypedArrays
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Happy Coding!

‎examples/PacktDataStructuresAlgorithms.min.js

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‎examples/chapter03/01-Stack.html

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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="UTF-8">
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<title></title>
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</head>
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<body>
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<script src="./../../dist/js/data-structures/stack.js"></script>
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<script src="./../../dist/js/data-structures/stack-array.js"></script>
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<script type="module" src="01-Stack.js"></script>
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</body>
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</html>

‎examples/chapter03/01-Stack.js

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import Stack from './../../src/js/data-structures/stack.js'; // ES2015 modules
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import StackArray from './../../src/js/data-structures/stack-array.js'; // ES2015 modules
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// const Stack = require('../../dist/js/data-structures/stack'); // for node
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// const Stack = stack; // older browsers - remove from html script import: type="module"
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const stack = new Stack(); // new StackArray();
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// using WeakMap to store Stack items we ensure true privacy
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// console.log(Object.getOwnPropertyNames(stack));
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// console.log(Object.keys(stack));
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console.log('stack.isEmpty() => ', stack.isEmpty()); // outputs true
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stack.push(5);
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stack.push(8);
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console.log('stack after push 5 and 8 => ', stack.toString());
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console.log('stack.peek() => ', stack.peek()); // outputs 8
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stack.push(11);
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console.log('stack.size() after push 11 => ', stack.size()); // outputs 3
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console.log('stack.isEmpty() => ', stack.isEmpty()); // outputs false
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stack.push(15);
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stack.pop();
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stack.pop();
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console.log('stack.size() after push 15 and pop twice => ', stack.size()); // outputs 2

‎examples/chapter03/01-StackSymbol.js

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const _items = Symbol('stackItems');
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class Stack {
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constructor() {
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this[_items] = [];
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}
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push(element) {
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this[_items].push(element);
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}
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pop() {
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return this[_items].pop();
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}
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peek() {
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return this[_items][this[_items].length - 1];
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}
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isEmpty() {
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return this[_items].length === 0;
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}
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size() {
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return this[_items].length;
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}
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clear() {
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this[_items] = [];
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}
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print() {
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console.log(this.toString());
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}
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toString() {
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return this[_items].toString();
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}
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}
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const stack = new Stack();
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const objectSymbols = Object.getOwnPropertySymbols(stack);
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console.log(objectSymbols.length); // 1
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console.log(objectSymbols); // [Symbol()]
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console.log(objectSymbols[0]); // Symbol()
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stack[objectSymbols[0]].push(1);
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stack.print(); // 5, 8, 1

‎examples/chapter03/02-BalancedSymbols.html

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<html>
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<head>
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<meta charset="UTF-8">
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<title></title>
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</head>
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<body>
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<script src="./../PacktDataStructuresAlgorithms.min.js"></script>
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<script src="02-BalancedSymbols.js"></script>
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</body>
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</html>

‎examples/chapter03/02-BalancedSymbols.js

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const parenthesesChecker = PacktDataStructuresAlgorithms.parenthesesChecker;
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console.log('{([])}', parenthesesChecker('{([])}')); // true
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console.log('{{([][])}()}', parenthesesChecker('{{([][])}()}')); // true
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console.log('[{()]', parenthesesChecker('[{()]')); // false

‎examples/chapter03/03-DecimalToBinary.html

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<title></title>
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</head>
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<body>
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<script src="./../PacktDataStructuresAlgorithms.min.js"></script>
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<script src="03-DecimalToBinary.js"></script>
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</body>
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</html>

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