Init

.vscode/launch.json

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+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "type": "node",
+            "request": "launch",
+            "name": "Launch Program",
+            "program": "${workspaceFolder}/Main.js",
+            "console": "integratedTerminal",
+        }
+    ]
+}

Main.js

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+// Import
+var permutationWithoutDuplicates = require("./PermutationsWithoutDuplicates.js");
+var permutationWithDuplicates = require("./PermutationsWithDuplicates.js");
+var subsets = require("./Subsets.js");
+
+// Invocation
+
+// permutationWithoutDuplicates.main();
+// permutationWithDuplicates.main();
+// subsets.main();

PermutationsWithDuplicates.js

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+// https://leetcode.com/problems/permutations-ii/description/
+
+// Permutations without
+var subsetWithoutDuplicates = function(nums) {
+  if(nums.lenght == 0){
+    return;
+  }
+  var solution = [];
+  subsetWithoutDuplicatesAux(nums, [], solution);
+  console.log(solution);
+}
+
+var subsetWithoutDuplicatesAux = function(nums, current, sol) {
+  if(nums.length == 0){
+    sol.push(current);
+  }
+
+  var setNums = new Set();
+
+  nums.forEach((value, index) => {
+    if(setNums.has(value)) {
+      return;
+    }
+    setNums.add(value);
+    var newCurrent = [...current, value]
+
+    var newNum = nums.filter(function(num, idx) { return index !== idx});
+    subsetWithoutDuplicatesAux(newNum, newCurrent, sol);
+  })
+}
+
+function main() {
+  subsetWithoutDuplicates([1,1,2,3]);
+}
+
+module.exports.main = main;

PermutationsWithoutDuplicates.js

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+//https://leetcode.com/problems/permutations/description/
+
+// Permutations wihto
+var subsetWithDuplicates = function(nums) {
+  if(nums.lenght == 0){
+    return;
+  }
+  var solution = [];
+  subsetWithDuplicatesAux(nums, [], solution);
+  console.log(solution);
+}
+
+var subsetWithDuplicatesAux = function(nums, current, sol) {
+  if(nums.length == 0){
+    sol.push(current);
+  }
+
+  for(var i = 0; i < nums.length; i++) {
+    var newCurrent = [...current, nums[i]]
+
+    var newNum = nums.filter(function(num, index) { return index !== i});
+    subsetWithDuplicatesAux(newNum, newCurrent, sol);
+  }
+}
+
+function main() {
+  subsetWithDuplicates([1,2,3])
+}
+
+module.exports.main = main;

Subsets.js

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+var subsets = function(nums) {
+  var ret = [];
+
+  subsetByPosition = function (nums, position, current) {
+    console.log(current);
+    if(position == nums.length) {
+        return [current];
+    }
+    var currentRight = current.slice().concat([nums[position]]);
+    return subsetByPosition(nums, position + 1, currentRight).concat(subsetByPosition(nums, position + 1, current));
+  }
+
+  return subsetByPosition(nums, 0, []);
+};
+
+function main() {
+  console.log(subsets([1,2,3]));
+}
+
+module.exports.main = main;

TicTacToe.js

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+
+class TicTacToe {
+  constructor() {
+    this.matrix = [];
+    for(var i = 0; i < 3; i++) {
+      this.matrix[i] = [];
+      for(var j = 0; j < 3; j++) {
+        this.matrix[i][j] = "-";
+      }
+    }
+  };
+
+  validToken(token) {
+    if (token == "X" || token == "0" || token == "-") {
+      return true;
+    }
+    console.log("Token is invalid");
+    return false;
+  }
+
+  addToken(x, y, token) {
+    // Check valid positions
+    if(this.validToken(token)) {
+      this.matrix[x][y] = token;
+    }
+  };
+
+  printBoard() {
+    for(var row = 0; row < 3; row ++) {
+      console.log(this.matrix[row][0] + "|" 
+      + this.matrix[row][1] + "|" 
+      + this.matrix[row][2]); // Check new line;
+    }
+  }
+
+  isBoardFull() {
+    for(var row = 0; row < 3; row ++) {
+      for(var col = 0; col < 3; col ++) { 
+        if(this.matrix[row][col] === "-") {
+          console.log("Is not full");
+          return false;
+        }
+      }  
+    }
+    console.log("Is full");
+    return true;
+  }
+
+  makeMove() {
+    if(this.isBoardFull()) {
+      throw "Error Board is Full";
+    }
+    for(var row = 0; row < 3; row ++) {
+      for(var col = 0; col < 3; col ++) { 
+        if(this.matrix[row][col] === "-") {
+          this.addToken(row, col, "0");
+        }
+      }  
+    }
+  }
+}
+
+ticTacToe = new TicTacToe();
+ticTacToe.isBoardFull();
+ticTacToe.addToken(0,1,"X");
+ticTacToe.printBoard();
+var iter = 0;
+while(iter < 8) {
+  ticTacToe.makeMove();
+  iter++;
+}
+
+console.log("after 8 moves");
+ticTacToe.isBoardFull();
+ticTacToe.printBoard();
+ticTacToe.makeMove();
+
+// ticTacToe.printBoard();
+// ticTacToe.addToken(0,0,"X");
+// ticTacToe.printBoard();
+
+
+
+// // var readline = require('readline')
+
+// // const rl = readline.createInterface({
+// //   input: process.stdin,
+// //   output: process.stdout
+// // });
+
+// // var response = rl.question('Whats your name : ', answer)
+
+// // function answer(response) {
+// //     console.log(response)
+// // }