Fixed formatting problems, added JSDoc, added example for JS, fixed example for JS

06_breadth-first_search/ES6/01_breadth-first_search.js

@@ -1,18 +1,27 @@
-const personIsSeller = name => name[name.length - 1] === 'm';
-
 const graph = {};
-graph.you = ['alice', 'bob', 'claire'];
-graph.bob = ['anuj', 'peggy'];
-graph.alice = ['peggy'];
-graph.claire = ['thom', 'jonny'];
+graph.you = ["alice", "bob", "claire"];
+graph.bob = ["anuj", "peggy"];
+graph.alice = ["peggy"];
+graph.claire = ["thom", "jonny"];
 graph.anuj = [];
 graph.peggy = [];
 graph.thom = [];
 graph.jonny = [];
 
-const search = (name) => {
-  let searchQueue = [];
-  searchQueue = searchQueue.concat(graph[name]);
+/**
+ * Determine whether a person is a seller
+ * @param {string} name Friend's name
+ * @returns {boolean} Result of checking
+ */
+const personIsSeller = name => name[name.length - 1] === "m";
+
+/**
+ * Find a mango seller
+ * @param {string} name Friend's name
+ * @returns {boolean} Search results
+ */
+const search = name => {
+  let searchQueue = [...graph[name]];
   // This array is how you keep track of which people you've searched before.
   const searched = [];
   while (searchQueue.length) {
@@ -31,4 +40,4 @@ const search = (name) => {
   return false;
 };
 
-search('you'); // thom is a mango seller!
+search("you"); // thom is a mango seller!

06_breadth-first_search/ES6/02_breadth-first_search_by_Rytikov_Dmitrii.js

@@ -1,23 +1,35 @@
 const graph = {};
-graph.you = ['alice', 'bob', 'claire'];
-graph.bob = ['anuj', 'peggy'];
-graph.alice = ['peggy'];
-graph.claire = ['thom', 'jonny'];
+graph.you = ["alice", "bob", "claire"];
+graph.bob = ["anuj", "peggy"];
+graph.alice = ["peggy"];
+graph.claire = ["thom", "jonny"];
 graph.anuj = [];
 graph.peggy = [];
 graph.thom = [];
 
-const isSeller = name => name[name.length - 1] === 'm';
+/**
+ * Determine whether a person is a seller
+ * @param {string} name Friend's name
+ * @returns {boolean} Result of checking
+ */
+const isSeller = name => name[name.length - 1] === "m";
 
-const search = (name, graph) => {
-  const iter = (waited, visited) => {
-    if (waited.length === 0) {
-      return false;
-    }
+/**
+ * Find a mango seller
+ * @param {string} name Friend's name
+ * @param {Object} graph Hash table
+ * @returns {boolean} Search results
+ */
+const search = (name, graph = {}) => {
+  /**
+   * Recursive function to test people
+   * @param {Array} waited List of people you need to check
+   * @param {Set} visited List of checked people
+   */
+  const iter = (waited = [], visited) => {
+    if (waited.length === 0) return false;
     const [current, ...rest] = waited;
-    if (visited.has(current)) {
-      return iter(rest, visited);
-    }
+    if (visited.has(current)) return iter(rest, visited);
     if (isSeller(current)) {
       console.log(`${current} is a mango seller!`);
       return true;
@@ -29,4 +41,4 @@ const search = (name, graph) => {
   return iter(graph[name], new Set());
 };
 
-search('you');
+search("you", graph);

06_breadth-first_search/javascript/01_breadth-first_search.js

@@ -1,7 +1,3 @@
-function person_is_seller(name) {
-  return name[name.length - 1] === "m";
-}
-
 const graph = {};
 graph["you"] = ["alice", "bob", "claire"];
 graph["bob"] = ["anuj", "peggy"];
@@ -12,6 +8,20 @@ graph["peggy"] = [];
 graph["thom"] = [];
 graph["jonny"] = [];
 
+/**
+ * Determine whether a person is a seller
+ * @param {string} name Friend's name
+ * @returns {boolean} Result of checking
+ */
+function personIsSeller(name) {
+  return name[name.length - 1] === "m";
+}
+
+/**
+ * Find a mango seller
+ * @param {string} name Friend's name
+ * @returns {boolean} Search results
+ */
 function search(name) {
   let search_queue = [];
   search_queue = search_queue.concat(graph[name]);
@@ -21,7 +31,7 @@ function search(name) {
     let person = search_queue.shift();
     // Only search this person if you haven't already searched them
     if (searched.indexOf(person) === -1) {
-      if (person_is_seller(person)) {
+      if (personIsSeller(person)) {
         console.log(person + " is a mango seller!");
         return true;
       }

06_breadth-first_search/javascript/02_breadth-first_search_recursion.js

@@ -0,0 +1,48 @@
+const graph = {};
+graph["you"] = ["alice", "bob", "claire"];
+graph["bob"] = ["anuj", "peggy"];
+graph["alice"] = ["peggy"];
+graph["claire"] = ["thom", "jonny"];
+graph["anuj"] = [];
+graph["peggy"] = [];
+graph["thom"] = [];
+graph["jonny"] = [];
+
+/**
+ * Determine whether a person is a seller
+ * @param {string} name Friend's name
+ * @returns {boolean} Result of checking
+ */
+function personIsSeller(name) {
+  return name[name.length - 1] === "m";
+}
+
+/**
+ * Find a mango seller
+ * @param {string} name Friend's name
+ * @param {Object} graph Hash table
+ * @returns {boolean} Search results
+ */
+function search(name, graph) {
+  graph = graph || {};
+  /**
+   * Recursive function to check people
+   * @param {Array} waited List of people you need to check
+   * @param {Array} visited List of checked people
+   */
+  function inner(waited, visited) {
+    waited = waited || [];
+    if (waited.length === 0) return false;
+    const person = waited[0];
+    const waitedCloned = waited.slice(1);
+    if (visited.indexOf(person) !== -1) return inner(waitedCloned, visited);
+    if (personIsSeller(person)) {
+      console.log(person + " is a mango seller!");
+      return true;
+    }
+    return inner(waitedCloned.concat(graph[person]), visited.concat(person));
+  }
+  return inner(graph[name], []);
+}
+
+search("you", graph);