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Commit 3f99c56

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chore(lab): add new exercises and fix comment:wq
1 parent c7e5c31 commit 3f99c56

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3 files changed

+103
-7
lines changed

3 files changed

+103
-7
lines changed
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/**
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* Your WordDictionary object will be instantiated and called as such:
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* var obj = new WordDictionary()
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* obj.addWord(word)
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* var param_2 = obj.search(word)
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*/
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class WordDictionary {
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children = {};
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isWord = false;
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/**
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* Initialize your data structure here.
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*/
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constructor() {
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}
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/**
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* Adds a word into the data structure.
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* @param {string} word
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* @return {void}
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*/
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addWord (word) {
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let curr = this;
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for (let char of word) {
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if (!curr.children[char]) curr.children[char] = new WordDictionary();
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curr = curr.children[char];
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}
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curr.isWord = true;
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}
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/**
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* Returns if the word is in the data structure.
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* A word could contain the dot character '.' to represent any one letter.
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* @param {string} word
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* @return {boolean}
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*/
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search (word, curr = this, index = 0) {
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if (index > word.length) return true; // e.g. final '.'
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for (let [i, char] of [...word.slice(index)].entries()) {
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if (char === '.') {
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for (let child of Object.keys(curr.children)) {
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if (this.search(word, curr.children[child], i + 1)) return true;
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}
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}
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else if (!curr || !curr.children[char]) return false;
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curr = curr.children[char];
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}
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return curr.isWord;
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}
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}
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module.exports = WordDictionary;
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const WordDictionary = require('./trie-wildcard-search');
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describe('WordDictionary', () => {
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let wd;
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beforeEach(() => {
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wd = new WordDictionary();
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});
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describe('should find exact matches', () => {
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beforeEach(() => {
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wd.addWord('bad');
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wd.addWord('mad');
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});
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it('should find match', () => {
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expect(wd.search('bad')).toEqual(true);
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expect(wd.search('mad')).toEqual(true);
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});
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it('should be false for partial match', () => {
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expect(wd.search('ba')).toEqual(false);
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});
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it('should be false for NO match', () => {
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expect(wd.search('dad')).toEqual(false);
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});
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});
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describe('should find wildcard matches', () => {
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beforeEach(() => {
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wd.addWord('bad');
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});
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it('should work with 1 wildcard', () => {
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expect(wd.search('.ad')).toEqual(true);
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});
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it('should work with 1 wildcard not match', () => {
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expect(wd.search('.ax')).toEqual(false);
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});
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it('should work with 2 wildcard', () => {
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expect(wd.search('..d')).toEqual(true);
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});
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});
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});

‎src/data-structures/graphs/graph.js

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Original file line numberDiff line numberDiff line change
@@ -250,12 +250,7 @@ class Graph {
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}
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}
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Graph.UNDIRECTED = Symbol('undirected graph'); // one-way edges
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Graph.DIRECTED = Symbol('directed graph'); // two-ways edges
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Graph.UNDIRECTED = Symbol('directed graph'); // two-ways edges
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Graph.DIRECTED = Symbol('undirected graph'); // one-way edges
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module.exports = Graph;
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/*
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* https://repl.it/@amejiarosario/graphpy
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* http://www.pythontutor.com/visualize.html#mode=edit - https://goo.gl/Xp7Zpm
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*/

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