Memory Game
Jaap MurreThis is an experiment that may be considered a variant on a well-known game.
A number of cards are shown face-down. The game is played by clicking two cards with the left mouse button. When clicked a card is turned and you view it. If two clicked cards are equal, they are taken out of the game.
You win if all pairs have been identified.
Though this is a minimal implementation (less than 70 lines of JavaScript), it is fully functional and works on phones and tables too.
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var cards = [], blocks = [], rows = 3, cols = 4, use_icons = true,
i, t, r, k, b, id, waiting = false,
symbols = [], first = null, trials = 0, success = 0,
message = main.addblock(20,2,70,10).text("0 trials")
.style("font-size","1.2em"),
imb = main.addblock(1,'top',20,20)
.setimage("https://scripting.neurotask.com/images/cache/e5c436c360f1aec505f6a03f6586901f.png");
var icons = ['glass','music','search','envelope-alt','heart','star',
'user','film','cog','trash','home','time'];
for (i = 1; i <= rows*cols/2; i++) {
t = use_icons ? '' : i;
symbols.push(t);
symbols.push(t);
}
symbols = shuffle(symbols);
function onClick(_b) {
return function() {
if (waiting) {
return;
}
var b = _b;
if (first) {
waiting = true;
console.log("b: ",b, b.id);
if (first.id === b.id) {
b.text(b.id).style("background-color","lightblue");
await(1000);
first.clear().style("background-color","silver");
b.clear().style("background-color","silver");
first.handler.remove();
b.handler.remove();
success += 2;
if (success === rows*cols) {
message.text("Finished in " + ++trials
+ " trials!");
}
else {
message.text("" + (++trials) + " trial" + (trials === 1?"":"s"));
}
}
else {
b.text(b.id).style("background-color","lightblue");
await(2000);
b.clear().style("background-color","steelblue");
first.clear().style("background-color","steelblue");
message.text("" + (++trials) + " trial" + (trials === 1?"":"s"));
}
first = null;
}
else {
first = b;
b.text(b.id).style("background-color","lightblue");
}
waiting = false;
}
}
for (c = 0; c < cols; c++) {
for (r = 0; r < rows; r++) {
id = symbols[c*rows+r];
b = main.addblock(c*(100/cols)+2,20+r*(80/rows),
91/cols,75/rows,"steelblue").style("font-size","2em");
b.id = id;
b.handler = b.on("click",onClick(b));
}
}
addblock(85,3,15,7,"lightgrey","Quit").await('click');