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chapter 07: [Dictionaries and Hashes]
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‎.eslintrc.json

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"no-console": 0,
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"import/prefer-default-export": 0,
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"comma-dangle": 0,
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"no-underscore-dangle": 0
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"no-underscore-dangle": 0,
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"no-param-reassign": 0
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}
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}

‎README.md

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* 04: [Queues and Deques](https://github.com/loiane/javascript-datastructures-algorithms/tree/third-edition/examples/chapter04)
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* 05: [LinkedLists](https://github.com/loiane/javascript-datastructures-algorithms/tree/third-edition/examples/chapter05)
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* 06: [Sets](https://github.com/loiane/javascript-datastructures-algorithms/tree/third-edition/examples/chapter06)
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* 07: [Dictionaries and Hashes](https://github.com/loiane/javascript-datastructures-algorithms/tree/third-edition/examples/chapter07)
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### Third Edition Updates
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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 (library and tests)
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## Project Structure
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`src/js/index.js` file contains all the data structures and algorithms listed by chapter.
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```
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|_examples (how to use each data structure and algorithm, organized by chapter)
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|_src
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|___js (source code: JavaScript version)
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|_____data-structures
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|_______models (classes used by DS: Node, ValuePair, ...)
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|_____others (other algorithms such as palindome checker, hanoi tower)
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|___ts (source code: TypeScript version)
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|_____data-structures
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|_______models
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|_____others
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|_test (unit tests with Mocha and Chai for src)
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|___js (tests for JavaScript code)
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|___ts (tests for TypeScript code)
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```
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## Installing and running the book examples With Node
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* Install [Node](https://nodejs.org)

‎examples/PacktDataStructuresAlgorithms.min.js

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‎examples/chapter07/01-Dictionaries.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="./../PacktDataStructuresAlgorithms.min.js"></script>
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<script src="01-Dictionaries.js"></script>
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</body>
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</html>

‎examples/chapter07/01-Dictionaries.js

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const { Dictionary } = PacktDataStructuresAlgorithms;
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const dictionary = new Dictionary();
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dictionary.set('Gandalf', '[email protected]');
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dictionary.set('John', '[email protected]');
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dictionary.set('Tyrion', '[email protected]');
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console.log(dictionary.hasKey('Gandalf')); // true
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console.log(dictionary.size()); // 3
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console.log(dictionary.keys()); // ["Gandalf", "John", "Tyrion"]
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console.log(dictionary.values()); // ["[email protected]", "[email protected]", "[email protected]"]
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console.log(dictionary.get('Tyrion')); // tyrion@email.com
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dictionary.remove('John');
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console.log(dictionary.keys()); // ["Gandalf", "Tyrion"]
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console.log(dictionary.values()); // ["[email protected]", "[email protected]"]
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console.log(dictionary.keyValues()); // [{key: "Gandalf", value: "gandalf@email.com"}, {key: "Tyrion", value: "tyrion@email.com"}]
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console.log(dictionary.toString()); // [#Gandalf: gandalf@email.com],[#Tyrion: [email protected]]

‎examples/chapter07/02-HashTable.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="./../PacktDataStructuresAlgorithms.min.js"></script>
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<script src="02-HashTable.js"></script>
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</body>
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</html>

‎examples/chapter07/02-HashTable.js

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const { HashTable } = PacktDataStructuresAlgorithms;
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const hash = new HashTable();
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hash.put('Gandalf', '[email protected]');
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hash.put('John', '[email protected]');
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hash.put('Tyrion', '[email protected]');
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hash.put('Aaron', '[email protected]');
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hash.put('Donnie', '[email protected]');
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hash.put('Ana', '[email protected]');
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hash.put('Jonathan', '[email protected]');
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hash.put('Jamie', '[email protected]');
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hash.put('Sue', '[email protected]');
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hash.put('Mindy', '[email protected]');
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hash.put('Paul', '[email protected]');
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hash.put('Nathan', '[email protected]');
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console.log('**** Printing Hash **** ');
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console.log(hash.toString());
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// {5 => [#Sue: sue@email.com]},{10 => [#Nathan: nathan@email.com]},{13 => [#Ana: ana@email.com]},{16 => [#Aaron: aaron@email.com]},{19 => [#Gandalf: gandalf@email.com]},{29 => [#John: johnsnow@email.com]},{32 => [#Paul: paul@email.com]}
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console.log('**** Get **** ');
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console.log(hash.get('Gandalf')); // gandalf@email.com
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console.log(hash.get('Loiane')); // undefined
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console.log('**** Remove **** ');
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hash.remove('Gandalf');
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console.log(hash.get('Gandalf')); // undefined
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console.log(hash.toString());
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// {5 => [#Sue: sue@email.com]},{10 => [#Nathan: nathan@email.com]},{13 => [#Ana: ana@email.com]},{16 => [#Aaron: aaron@email.com]},{29 => [#John: johnsnow@email.com]},{32 => [#Paul: paul@email.com]}

‎examples/chapter07/03-HashCollisionSeparateChaining.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="./../PacktDataStructuresAlgorithms.min.js"></script>
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<script src="03-HashCollisionSeparateChaining.js"></script>
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</body>
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</html>

‎examples/chapter07/03-HashCollisionSeparateChaining.js

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const { HashTableSeparateChaining } = PacktDataStructuresAlgorithms;
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const hashTable = new HashTableSeparateChaining();
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hashTable.put('Gandalf', '[email protected]');
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hashTable.put('John', '[email protected]');
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hashTable.put('Tyrion', '[email protected]');
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hashTable.put('Aaron', '[email protected]');
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hashTable.put('Donnie', '[email protected]');
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hashTable.put('Ana', '[email protected]');
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hashTable.put('Jonathan', '[email protected]');
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hashTable.put('Jamie', '[email protected]');
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hashTable.put('Sue', '[email protected]');
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hashTable.put('Mindy', '[email protected]');
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hashTable.put('Paul', '[email protected]');
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hashTable.put('Nathan', '[email protected]');
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console.log('**** Printing Hash **** ');
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console.log(hashTable.toString());
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// {5 => [#Jonathan: jonathan@email.com],[#Jamie: [email protected]],[#Sue: [email protected]]},{10 => [#Nathan: nathan@email.com]},{13 => [#Donnie: donnie@email.com],[#Ana: [email protected]]},{16 => [#Tyrion: tyrion@email.com],[#Aaron: [email protected]]},{19 => [#Gandalf: gandalf@email.com]},{29 => [#John: johnsnow@email.com]},{32 => [#Mindy: mindy@email.com],[#Paul: [email protected]]}
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console.log('**** Get **** ');
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console.log(hashTable.get('Jamie')); // jamie@email.com
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console.log(hashTable.get('Sue')); // sue@email.com
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console.log(hashTable.get('Jonathan')); // jonathan@email.com
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console.log(hashTable.get('Loiane')); // undefined
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console.log('**** Remove **** ');
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console.log(hashTable.remove('Gandalf')); // true
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console.log(hashTable.get('Gandalf')); // undefined
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console.log(hashTable.toString());
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// {5 => [#Jonathan: jonathan@email.com],[#Jamie: [email protected]],[#Sue: [email protected]]},{10 => [#Nathan: nathan@email.com]},{13 => [#Donnie: donnie@email.com],[#Ana: [email protected]]},{16 => [#Tyrion: tyrion@email.com],[#Aaron: [email protected]]},{29 => [#John: johnsnow@email.com]},{32 => [#Mindy: mindy@email.com],[#Paul: [email protected]]}
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console.log(hashTable.remove('Sue')); // true
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console.log(hashTable.toString());
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// {5 => [#Jonathan: jonathan@email.com],[#Jamie: [email protected]]},{10 => [#Nathan: nathan@email.com]},{13 => [#Donnie: donnie@email.com],[#Ana: [email protected]]},{16 => [#Tyrion: tyrion@email.com],[#Aaron: [email protected]]},{29 => [#John: johnsnow@email.com]},{32 => [#Mindy: mindy@email.com],[#Paul: [email protected]]}
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console.log(hashTable.remove('Jamie')); // true
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console.log(hashTable.toString());
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// {5 => [#Jonathan: jonathan@email.com]},{10 => [#Nathan: nathan@email.com]},{13 => [#Donnie: donnie@email.com],[#Ana: [email protected]]},{16 => [#Tyrion: tyrion@email.com],[#Aaron: [email protected]]},{29 => [#John: johnsnow@email.com]},{32 => [#Mindy: mindy@email.com],[#Paul: [email protected]]}
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console.log(hashTable.remove('Donnie')); // true
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console.log(hashTable.toString());
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// {5 => [#Jonathan: jonathan@email.com]},{10 => [#Nathan: nathan@email.com]},{13 => [#Ana: ana@email.com]},{16 => [#Tyrion: tyrion@email.com],[#Aaron: [email protected]]},{29 => [#John: johnsnow@email.com]},{32 => [#Mindy: mindy@email.com],[#Paul: [email protected]]}

‎examples/chapter07/04-HashCollisionLinearProbing.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="./../PacktDataStructuresAlgorithms.min.js"></script>
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<script src="04-HashCollisionLinearProbing.js"></script>
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</body>
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</html>

‎examples/chapter07/04-HashCollisionLinearProbing.js

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const { HashTableLinearProbing } = PacktDataStructuresAlgorithms;
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const hashTable = new HashTableLinearProbing();
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hashTable.put('Gandalf', '[email protected]');
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hashTable.put('John', '[email protected]');
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hashTable.put('Tyrion', '[email protected]');
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hashTable.put('Aaron', '[email protected]');
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hashTable.put('Donnie', '[email protected]');
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hashTable.put('Ana', '[email protected]');
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hashTable.put('Jonathan', '[email protected]');
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hashTable.put('Jamie', '[email protected]');
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hashTable.put('Sue', '[email protected]');
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hashTable.put('Mindy', '[email protected]');
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hashTable.put('Paul', '[email protected]');
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hashTable.put('Nathan', '[email protected]');
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console.log('**** Printing Hash **** ');
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console.log(hashTable.toString());
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// {5 => [#Jonathan: jonathan@email.com]},{6 => [#Jamie: jamie@email.com]},{7 => [#Sue: sue@email.com]},{10 => [#Nathan: nathan@email.com]},{13 => [#Donnie: donnie@email.com]},{14 => [#Ana: ana@email.com]},{16 => [#Tyrion: tyrion@email.com]},{17 => [#Aaron: aaron@email.com]},{19 => [#Gandalf: gandalf@email.com]},{29 => [#John: johnsnow@email.com]},{32 => [#Mindy: mindy@email.com]},{33 => [#Paul: paul@email.com]}
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console.log('**** Get **** ');
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console.log(hashTable.get('Nathan')); // nathan@email.com
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console.log(hashTable.get('Loiane')); // undefined
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console.log('**** Remove **** ');
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hashTable.remove('Gandalf');
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console.log(hashTable.get('Gandalf')); // undefined
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console.log(hashTable.toString());
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// {5 => [#Jonathan: jonathan@email.com]},{6 => [#Jamie: jamie@email.com]},{7 => [#Sue: sue@email.com]},{10 => [#Nathan: nathan@email.com]},{13 => [#Donnie: donnie@email.com]},{14 => [#Ana: ana@email.com]},{16 => [#Tyrion: tyrion@email.com]},{17 => [#Aaron: aaron@email.com]},{29 => [#John: johnsnow@email.com]},{32 => [#Mindy: mindy@email.com]},{33 => [#Paul: paul@email.com]}
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console.log('**** Remove Test 2 **** ');
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console.log('Removing Jonathan', hashTable.remove('Jonathan')); // true
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console.log('**** Print **** ');
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console.log(hashTable.toString());
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// {5 => [#Jamie: jamie@email.com]},{6 => [#Sue: sue@email.com]},{10 => [#Nathan: nathan@email.com]},{13 => [#Donnie: donnie@email.com]},{14 => [#Ana: ana@email.com]},{16 => [#Tyrion: tyrion@email.com]},{17 => [#Aaron: aaron@email.com]},{29 => [#John: johnsnow@email.com]},{32 => [#Mindy: mindy@email.com]},{33 => [#Paul: paul@email.com]}
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console.log(hashTable.get('Jamie')); // jamie@email.com
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console.log('**** Print **** ');
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console.log(hashTable.toString());
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// {5 => [#Jamie: jamie@email.com]},{6 => [#Sue: sue@email.com]},{10 => [#Nathan: nathan@email.com]},{13 => [#Donnie: donnie@email.com]},{14 => [#Ana: ana@email.com]},{16 => [#Tyrion: tyrion@email.com]},{17 => [#Aaron: aaron@email.com]},{29 => [#John: johnsnow@email.com]},{32 => [#Mindy: mindy@email.com]},{33 => [#Paul: paul@email.com]}

‎examples/chapter07/05-ES2015Map.html

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<!DOCTYPE html>
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<html lang="en">
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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="05-ES2015Map.js"></script>
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</body>
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</html>

‎examples/chapter07/05-ES2015Map.js

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const map = new Map();
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map.set('Gandalf', '[email protected]');
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map.set('John', '[email protected]');
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map.set('Tyrion', '[email protected]');
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console.log(map.has('Gandalf')); // true
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console.log(map.size); // 3
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console.log(map.keys()); // MapIterator {"Gandalf", "John", "Tyrion"}
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console.log(map.values()); // MapIterator {"gandalf@email.com", "[email protected]", "[email protected]"}
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console.log(map.get('Tyrion')); // tyrion@email.com
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map.delete('John');
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console.log(map.keys()); // MapIterator {"Gandalf", "Tyrion"}
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console.log(map.values()); // MapIterator {"gandalf@email.com", "[email protected]"}

‎examples/chapter07/06-ES2015WeakMap.html

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<title></title>
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<script src="06-ES2015WeakMap.js"></script>
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</body>
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</html>

‎examples/chapter07/06-ES2015WeakMap.js

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const map = new WeakMap();
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const ob1 = { name: 'Gandalf' };
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const ob2 = { name: 'John' };
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const ob3 = { name: 'Tyrion' };
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map.set(ob1, '[email protected]');
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map.set(ob2, '[email protected]');
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map.set(ob3, '[email protected]');
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console.log(map.has(ob1)); // true
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console.log(map.has(ob2)); // true
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console.log(map.has(ob3)); // true
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console.log(map.get(ob3)); // tyrion@email.com
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map.delete(ob2);
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console.log(map.has(ob2)); // false

‎examples/chapter07/07-ES2015WeakSet.html

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<html lang="en">
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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="07-ES2015WeakSet.js"></script>
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</body>
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</html>

‎examples/chapter07/07-ES2015WeakSet.js

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var set = new WeakSet();
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const ob1 = { name: 'Gandalf' };
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const ob2 = { name: 'John' };
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const ob3 = { name: 'Tyrion' };
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set.add(ob1);
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set.add(ob2);
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set.add(ob3);
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console.log(set.has(ob1)); // true
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console.log(set.has(ob2)); // true
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console.log(set.has(ob3)); // true
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set.delete(ob2);
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console.log(set.has(ob2)); // false

‎examples/index.html

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<a href="#scroll-tab-4" class="mdl-layout__tab">04</a>
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<a href="#scroll-tab-5" class="mdl-layout__tab">05</a>
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<a href="#scroll-tab-6" class="mdl-layout__tab">06</a>
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<a href="#scroll-tab-7" class="mdl-layout__tab">07</a>
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</div>
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</header>
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</section>
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<section class="mdl-layout__tab-panel" id="scroll-tab-7">
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<div class="page-content">
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Soon.
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<div class="page-content mdl-layout--fixed-drawer">
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<div class="mdl-layout__drawer is-visible">
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<nav class="mdl-navigation">
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<a class="mdl-navigation__link" href="chapter07/01-Dictionaries.html">01-Dictionaries</a>
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<a class="mdl-navigation__link" href="chapter07/02-HashTable.html">02-HashTable</a>
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<a class="mdl-navigation__link" href="chapter07/03-HashCollisionSeparateChaining.html">03-HashCollision SeparateChaining</a>
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<a class="mdl-navigation__link" href="chapter07/04-HashCollisionLinearProbing.html">04-HashCollision LinearProbing</a>
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<a class="mdl-navigation__link" href="chapter07/05-ES2015Map.html">05-ES2015 Map</a>
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<a class="mdl-navigation__link" href="chapter07/06-ES2015WeakMap.html">06-ES2015 WeakMap</a>
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<a class="mdl-navigation__link" href="chapter07/07-ES2015WeakSet.html">07-ES2015 WeakSet</a>
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</nav>
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</div>
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</div>
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<section class="mdl-layout__tab-panel" id="scroll-tab-8">

‎package.json

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"test:js": "mocha --compilers js:babel-core/register ./test/js/**/*.spec.js --reporter mochawesome",
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"test:ts": "mocha -r ts-node/register --recursive ./test/ts/**/*.spec.ts",
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"test": "npm run test:js && npm run test:ts",
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"dev": "npm run clean && npm run lint && npm run webpack && npm run generate-report2",
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"dev": "npm run clean && npm run lint && npm run webpack && npm run generate-report",
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"dev2": "npm run clean && npm run lint && npm run webpack && npm run generate-report2",
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"coverage": "npm run generate-report && nyc report --reporter=text-lcov > coverage.lcov && codecov",
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"generate-report": "nyc --report-dir coverage npm run test && nyc report --reporter=text",
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"generate-report2": "nyc --report-dir coverage npm run test",
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},
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"devDependencies": {
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"@types/chai": "^4.0.4",
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"@types/mocha": "^2.2.43",
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"@types/mocha": "^2.2.44",
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"babel-cli": "^6.26.0",
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"babel-core": "^6.26.0",
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"babel-eslint": "^8.0.1",
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"babel-plugin-transform-es2015-modules-umd": "^6.24.1",
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"babel-preset-env": "^1.6.1",
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"chai": "^4.1.2",
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"codecov": "^2.3.1",
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"eslint": "^4.9.0",
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"codecov": "^3.0.0",
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"eslint": "^4.10.0",
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"eslint-config-airbnb-base": "^12.1.0",
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"eslint-plugin-import": "^2.8.0",
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"istanbul": "^v1.1.0-alpha.1",
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"tslint": "^5.8.0",
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"typescript": "^2.5.3",
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"webpack": "^3.8.1",
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"yargs": "^9.0.1"
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"yargs": "^10.0.3"
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}
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}

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