Mastermind Class Notes

MastermindClassNotes.js

'use strict';

var prompt = require('prompt');
prompt.start();
var colors = require('colors/safe');

var board = [

]

function printBoard() {
    // console.log(board[0]);
    // console.log(board[1]);
    // console.log(board[2]);
    for (var i = 0; i < board.length; i++) {
        console.log(board[i])
    }
}

function generateHints(solution, guess) {
    var solutionArray = solution.split(''); // ['c', 'b, 'a', 'b' ]
    var guessArray = guess.split(''); // ['a', 'b', 'c', 'b']

    var correctLetterLocations = 0;

    // write a loop that loops over each item
    // in solutionArray
    for (var i = 0; i < solutionArray.length; i++) {
        // if solutionArray at index i is equal to
        // guessArray at index i, then increment correctLetterLocations,
        // and cancel out solutionArra at that index
        if (solutionArray[i] === guessArray[i]) {
            correctLetterLocations++;
            solutionArray[i] = null;
        }
    }

    var correctLetters = 0;
    for (var i = 0; i < solutionArray.length; i++) {
        // if solution array contains guessArray at index i,
        // increment correctLetters and cancel out index i of
        // solutionArray

        // must save the index just in case it does exist
        var targetIndex = solutionArray.indexOf(guessArray[i]);
        if ( targetIndex > -1 ) {
            correctLetters++;
            // so that we can "target" it for nullification
            solutionArray[targetIndex] = null;
        }
    }

    return colors.red(correctLetterLocations) + ' - ' + correctLetters;
}

function insertCode(guess, hint) {
    board.push(guess + ' ' + hint);
}

function checkSolution(guess) {
    if (guess === solution) {
        console.log('You Won!');
        return true;
    } else {
        return false;
    }
}

var solution = '';

var letters = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h'];

function generateSolution() {

    for (var i = 0; i < 4; i++) {
        var randomIndex = getRandomInt(0, letters.length);
        solution += letters[randomIndex];
    }

}

function getRandomInt(min, max) {
  return Math.floor(Math.random() * (max - min)) + min;
}


function getPrompt() {
    printBoard();
    prompt.get(['guess'], function (error, result) {
        var guess = result['guess'];
        if (checkSolution(guess) === true) {
            return false;
        }
        var hint = generateHints(solution, guess);
        insertCode(guess, hint);
        if (board.length === 10) {
            console.log('Ran out of turns. You lose.');
            return false;
        }
        getPrompt();
    });
}

generateSolution();
console.log('solution: ' + solution);

getPrompt();