var i=j=0,g=[],x=(Math.random()+'').slice(2,6).split(''),m={48:0,49:1,50:2,51:3,52:4,53:5,54:6,55:7,56:8,57:9};function o(s){document.body.innerHTML+=s};o('4xGuess(0-9)<br/>*');function w(s,n){p='';for(n;n--;)p+=s;return p;}function a(){return c(x.slice())-b();}function b(){p=0;for(j in g)if(g[j]==x[j])p+=1;return p;}function c(a){p=0;for(j in g){if(found=h(a,g[j])){a.splice(found,1);p+=1;}}return p;}function h(q,r){for(e in q){if(r==q[e])return e;}return false;}function y(){alert('You won!');window.location.reload();}function l(){f=w('+',b())+w('-',a());f=='++++'?y():null;return ' '+f;}function k(c){p=c.keyCode;if(p>47&&p<58){g[i]=m[p];o(p-48);if(++i==4){o(l()+'<br/>* ');i=0;}}}onkeyup=k
<!doctype html>
<html>
<head>
<title>Javascript Mastermind - Mathieu Davy - 08 2010</title>
<meta charset="utf-8" />
</head>
<body>
<script>
/*
* A very simnple offline mastermind game created for http://js1k.com/
* Code inspired from the rspec book: http://www.pragprog.com/titles/achbd/the-rspec-book
* Tested on OS X 10.5.8 in:
* * Firefox 3.6.2
* * Safari 4.0.5
* * Chrome 5.0.375.125
* * Opera 10.60
*
* RULES:
* Guess by submitting with your keyboard numbers from 0-9
* After pressing 4 digits the guess is automatically submitted
* The result shows symbols:
* * no symbol means no digit is in the code to guess
* * a '-' means one of the digits is in the code to guess, but not at the correct place
* * a '+' means one of the digits is in the code to guess, AND at the correct place
* If a digit exists twice in the code to guess, symbols do not represent it, you will have
* to get it by yourself!
* An alert is displayed when the code is found, and the game reset
*/
//initialising vars
var i=0,
j=0,
guess=[],
code=(Math.random()+'').slice(2,6).split(''),
keymap={48:0,49:1,50:2,51:3,52:4,53:5,54:6,55:7,56:8,57:9};
// print stuff out
function out(s){document.body.innerHTML+=s};
// explain the rules
// for debug, we also printing the code in a non visible span => use firebug or similar to see it
out('Play mastermind by submitting guesses of 4 digits in the 0-9 range.<br/>A \'+\' means one of your digits is correctly placed, a \'-\' means you have a correct digit but at the wrong place.<br/>Simply enter 4 numbers below:<span style="display:none">'+code+'</span><br/>*');
// formatter for outputting the indicator
function buildpattern(sym,nb){
temp='';
for(nb;nb--;){
temp += sym;
}
return temp;
}
// calculates the number of correct digits wrongly placed
function number_match_count(){
return total_match_count(code.slice()) - exact_match_count();
}
// calculates the number of correct digits correctly placed
function exact_match_count(){
exact_match_nb = 0;
for(j in guess)
if(guess[j]==code[j])
exact_match_nb += 1;
return exact_match_nb;
}
// calculates the total number of matches for a digit in the code
function total_match_count(a){
number_match_nb=0;
for(j in guess){
if(found = include(a,guess[j])){
a.splice(found,1);
number_match_nb +=1;
}
}
return number_match_nb;
}
// returns the index of search in array arr, if found, otherwise returns false
function include(arr,search){
for(e in arr){
if(search==arr[e])
return e;
}
return false;
}
// displays winning alert message and resets game by redirecting
function won(){
alert('You won!');
window.location.reload();
}
// checks the 4-digits guess against the code
function check(){
returnstring=buildpattern('+',exact_match_count()) + buildpattern('-',number_match_count());
returnstring=='++++'?won():null;
return ' '+returnstring;
}
// processing code on key entry
function getchar(c){
p=c.keyCode;
if(p>47&&p<58){
guess[i]=keymap[p];
out(p-48);
if(++i==4){
out(check()+'<br/>* ');
i=0;
}
}
}
// register keyup event function
onkeyup=getchar
</script>
</body>
</html>
