Show HN: Brain Frog – Can you be random enough for 11 lines of JavaScript?
brainfrog.lol48 points by AlexanderZ 7 days ago
48 points by AlexanderZ 7 days ago
I got 50 hits in 100 tries. That being said, I did not particularly like hitting that poor frog :'( Yes, I am the kind of player who would never choose the rude option when talking to an NPC.
pure random player:
(async function(punch, delay) {
async function sleep(ms) {
return new Promise((resolve, _) => {
setTimeout(resolve, ms)
})
}
for (let i = 0; i < 100; i++) {
punch(['L', 'R'][(Math.random() * 2) | 0])
await sleep(delay)
}
})(punch, 150)
(async function(oracle, punch, delay) {
async function sleep(ms) {
return new Promise((resolve, _) => {
setTimeout(resolve, ms)
})
}
for (let i = 0; i < 100; i++) {
punch((i + 1) < oracle.minForPrediction ? ['L', 'R'][(Math.random() * 2) | 0] : oracle.predictNextPunch() === 'L' ? 'R' : 'L')
await sleep(delay)
}
})(oracle, punch, 150)
Less fancy hack here, intercept the prediction function on every punch and force the frog to take the opposite side. const realPunch = punch;
punch = function(myMove) {
oracle.predictNextPunch = function() {
return myMove === 'L' ? 'R' : 'L';
};
realPunch(myMove);it is:
(async function(oracle, punch, delay) {
async function sleep(ms) {
return new Promise((resolve, _) => {
setTimeout(resolve, ms)
})
}
for (let i = 0; i < 100; i++) {
const state = oracle._state
const block = oracle.predictNextPunch()
oracle._state = state
punch(block === 'L' ? 'R' : 'L')
await sleep(delay)
}
})(oracle, punch, 150)You should make one where you can play against the branch predictors of various processors.
I was just about to comment the same! Sadly, branch predictors are incredibly well guarded secrets, mostly.
I am briefly in the top ten after completely misunderstanding the rules nicee
I once coded a rock-paper-scissors game that you can play against a tree based matcher/learner, with symmetry between the options accounted for. Pretty similar idea-wise. To be honest, it was pretty hard to get a better than random score.
If you want to see what a random distribution looks like:
jot -r 100 0 1 | rs -t 10
With Brain Frog I went even further - it doesn't actually check L/R. Instead, it checks what you do after a landed/blocked punch (some people tend to switch after a block, others insist on hitting the same side until they land a hit).
Curious how a couple people got >100 hits on 100 punches
Would be fairer if the frog occasionally got to throw a punch or two...
In the first round I struggled to notice if I missed. The frog punching back would be a good indicator. And I wouldn't feel so guilty for punching a pacifist frog.
On my todo list: when the frog wins, it runs towards you and knocks you out, haha
That was fun, got up to 79 :)
46 and that was my ceiling. frogs smarter than me.
plot twist: there is no frog, it's all your internal biases (what you do after success/failure)
Woah, neat. Is this like, a Markov chain?
Just wanted to give the little guy a hug
Looks like the leaderboard was hacked unfortunately. Fun little concept.
Fixed it. The fun part is there is no real protection against bots/AI and the code works as expected - they EASILY score 100. It's the humans that are too predictable.
How many pixels wide is the hit zone?
Leaderboard has been overtaken :(
Bam! 50 on the first try. Fun.
nice! try playing it the first thing every morning, it really wakes up your brain
Why does a silly little online game need my email to send a one-time login code? What a strange experience
because it doesn't? practice mode requires no login. if you want to play a ranked match then you'll need an account, how else could it work?
> how else could it work?
Username+password. There is zero reason to require e-mail for account creation.
well, it's a personal preference thing then. I'd rather enter my email quickly and click a link than generate and store a new password for each website in a password manager
Practice mode also has a popup telling you what to do which seems to negate the point of the game?
it's the coach mode telling you which biases you have so you can fix them in a ranked match
Free?!. Is there a "call us" SSO enabled plan?