Create a Trie Search Tree
Hi,
My second solution to try pass the test… still fails the last two… 
What should are wrong?
my code
class Node {
constructor() {
this.keys = new Map();
this.end = false;
this.setEnd = function() {
this.end = true;
}
this.isEnd = function() {
return this.end;
}
}
}
class Trie {
constructor() {
this.root = new Node;
}
add(word) {
let loop = this.loop(word);
let result = loop.next();
let node = this.root;
while (!(result.done)) {
const {letter, index} = result.value;
if (!(node.keys.has(letter))) node.keys.set(letter, new Node()); // set this new letter
if (index === word.length - 1) node.setEnd(); // word end => set end to true
node = node.keys.get(letter);
result = loop.next();
}
}
isWord(word) {
let loop = this.loop(word);
let isWord = false;
let result = loop.next();
let node = this.root;
while (!(result.done)) {
const {letter, index} = result.value;
if (node && !(node.keys.has(letter))) {
isWord = false;
return isWord;
}
if (index === word.length - 1 && node.isEnd()) {
isWord = true;
return isWord;
}
node = node.keys.get(letter);
result = loop.next();
}
return isWord;
}
print() {
let words = [], subWord = "";
const walkInTrie = (node = this.root, word = "") => {
for (let letter of node.keys.keys()) {
if (node.keys.size > 1) {
subWord ? subWord.slice(0, subWord.length -1) : subWord = word;
walkInTrie(node.keys.get(letter), subWord += letter);
} else {
subWord = "";
walkInTrie(node.keys.get(letter), word += letter);
}
if (node.isEnd()) words.push(word);
}
};
walkInTrie();
return words.length > 0 ? words : null;
}
// callback: node, index, key, stop(break the loop)
* loop(word) {
const letters = [...word];
for (let index = 0; index < letters.length; index ++) {
const letter = letters[index];
const result = {index: index,
letter: letter}
;
yield result;
}
}
}
const myTrie = new Trie();
myTrie.add("code");
myTrie.add("coder");
myTrie.add("coala");
myTrie.add("csaba");
myTrie.add("csincsilla");
console.log(myTrie.isWord("code"));
console.log(myTrie.isWord("copied"));
console.log(myTrie.print());
console.log(myTrie);
I found the mistake. Resolved myself…