mastermind_console.js

const readline = require("readline");
let rlSync = require('readline-sync');

function calcScore(actual, guessed) {
  const result = { correctPos: 0, incorrectPos: 0 };
  for (let i = 0; i < actual.length; i++) {
    if (actual[i] === guessed[i]) {
      actual.splice(i, 1);
      guessed.splice(i, 1);
      result.correctPos += 1;
      i--;
    }
  }

  for (let val of guessed) {
    if (actual.includes(val)) {
      actual.splice(actual.indexOf(val), 1)
      result.incorrectPos += 1
    }
  }
  console.log(result);
  return result;
}

const getCode = () => new Array(4).fill(0).map(val => Math.floor(Math.random() * 6))
const gameObject = {
  code: null,

  rl: null,

  guessed: [],

  init: () => {
    this.code = getCode();
    console.log(this.code)
  },

  getinput: () => {
    this.guessed = rlSync.question("Please guess a 4 digit numeric code :")
    this.guessed = this.guessed.split('').map(num => Number(num));
  },

  isCorrect: () => {
    console.log(this.guessed)
    console.log(this.code)
    return (JSON.stringify(this.guessed) === JSON.stringify(this.code))
  }
}

function startGame() {
  console.log('MASTERMIND');
  const game = gameObject
  game.init();
  while (!game.isCorrect()) {
    game.getinput();
  }
}
startGame()