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Alexanfa

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World Modelling (2015) [video]

youtube.com
1 points·by Alexanfa·2 years ago·0 comments

In Conversation – Geoffrey Hinton and Joel Hellermark [video]

youtube.com
2 points·by Alexanfa·2 years ago·0 comments

comments

Alexanfa
·2 years ago·discuss
Noticed an error;

    return run(w, wS, r+1,m)
Should be changed to:

    return run(w, wS, m, r+1)
Alexanfa
·2 years ago·discuss
Ah, I'm using a set instead of list so I just always add and then toss remove.
Alexanfa
·2 years ago·discuss
Quanta:

    Round 1. Keep going through Hamlet, adding new words as you go. If you come to a word that’s already on your list, flip a coin again. If it’s tails, delete the word; heads, and the word stays on the list.

To:

    Round 1. Keep going through Hamlet, but now flipping a coin for each word. If it’s tails, delete the word if it exists; heads, and add the word  if it's not already on the list.

Old edit:

    Round 1. Keep going through Hamlet, adding words but now flipping a coin immediately after adding it. If it’s tails, delete the word; heads, and the word stays on the list.
Alexanfa
·2 years ago·discuss
Was just now solving it and came to see if others had the same issue. Yep, you are right.

    function generateRandomNumbers(c, n) {
      let randomNumbers = new Array(c);
      for (let i = 0; i < randomNumbers.length; i++) {
        let randomNumber = Math.floor(Math.random() * (n + 1));
        randomNumbers[i] = randomNumber;
      }
      return randomNumbers;
    }
    function run(w, wS, m, r) {
        function round(r) {
            while(wS.size < m) {
                const next = w.next()
                if (next.done) return true;
                wS.add(next.value)
                prune(next.value, r)
            }
            return false
        }
        function prune(v,r) {
            for (let i = 0; i < r; i++) {
                const flip = new Boolean(Math.round(Math.random()))
                if (flip == false) {
                    wS.delete(v)
                }
            }
        }
        function purge(wS) {
            const copy = new Set(wS)
            copy.forEach(ith=>{
                const flip = new Boolean(Math.round(Math.random()))
                if (flip == false) {
                    wS.delete(ith)
                }
            })
        }
        const done = round(r);
        if (!done) {
            purge(wS)
            return run(w, wS, r+1,m)
        }
        console.log(`Round ${r} done. ${wS.size} Estimate: ${wS.size / (1/Math.pow(2,r))}`)
    }
    const memory = 1000
    const words = generateRandomNumbers(3000000,15000)
    const w = words[Symbol.iterator]() // create an iterator
    const wS = new Set();
    run(w,wS, memory,0);