Code Fellows Foundations 1 Homework Assignment 2: JavaScript guessing game prompts user to guess the current day of the year (out of 365)

guessCurrentDayNum.html

<script>
//global var set up
var debugMode = false;
var userGuess = 0;
var gameWon = false;

var triesUsed = 0;
var triesAllowed = 2;
var triesRemaining = triesAllowed;

var today = new Date();
var daysSoFarThisYear = calculateDaysSoFarThisYear();

while (triesUsed < triesAllowed && gameWon == false) {
	promptForGuess();
	checkGuess();

	triesUsed ++;
	triesRemaining = triesAllowed - triesUsed;

	if (triesUsed == triesAllowed) {
		outOfTries();
	}
}

function calculateDaysSoFarThisYear() {
	var year2014Begin = new Date('1/1/2014'); //Set year begin date
	var before2014Msec = year2014Begin.getTime(); //Milliseconds 1/1/1970 to 1/1/2014
	var allMsec = today.getTime(); //Milliseconds from 1/1/1970 to today

	//Subtracting msec between 1/1/1970 and 1/1/2014 from msec between 1/1/1970 and today to get this year's millisecond total.
	//Divide this year's milliseconds by 86400000 to convert to days
	return Math.floor((allMsec - before2014Msec) / 86400000);
}

function promptForGuess() {
	userGuess = prompt("Today is " + today.toDateString() +". There are 365 days in 2014. Which day are we on? \n\n Tries Remaining: " + triesRemaining + "\n\n Enter your guess: ");
}

function checkGuess() {
	if (userGuess == daysSoFarThisYear) {
		alert("Correct! We are on day " + daysSoFarThisYear + " of 365.");
		document.write("You win! Refresh to play again.");
		gameWon = true;
	} else {
		offByNumber = daysSoFarThisYear - userGuess;
		alert("Incorrect! \n\n HINT: Your guess is off by " + offByNumber);
	}
}

function outOfTries() {
	alert("Out of tries! We are on day " + daysSoFarThisYear + " of 2014. \n\nYour answer: " + userGuess);
	document.write("Game Over - Refresh to play again!");
}


//Debug cheat puts answer in console for testing purposes
if (debugMode == true) {
	console.log("DEBUG CHEAT Days so far in 2014: " + daysSoFarThisYear);
}

/*
Resources I used:
http://www.timeanddate.com/date/duration.html
http://www.w3schools.com/jsref/jsref_gettime.asp
http://www.w3schools.com/jsref/jsref_obj_date.asp
*/
</script>

Created for Code Fellows Foundations 1 Homework Assignment #2 ("guessing game")