Get basic functions working; TODO map to some kind o UI
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<!doctype html>
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<html>
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<head>
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<style>
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.letter {
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padding: 0.1em;
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}
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.match {
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background: lightgreen;
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}
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.exists {
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background: yellow;
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}
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.notincluded {
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color: grey;
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}
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</style>
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<script type="text/javascript">
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var words = [];
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// encodes the result of the guess as a number in base 3
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// where
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// 0 means no match
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// 1 means an exact match, and
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// 2 means it's somewhere in the word
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function compute_match(guess, word) {
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var ret = 0
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var matched = 0
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const notmatched = []
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const last = Math.min(guess.length, word.length)-1
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for (var i = last; i >= 0; i--) {
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ret *= 3
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matched *= 2
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if (guess[i] == word[i]) {
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//console.log("match ", i)
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ret += 1
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matched += 1
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} else {
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notmatched.push(word[i])
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}
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}
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var mul = 1
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for (var i = 0; i <= last; i++) {
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if ((matched % 2) == 0) {
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// check against the notmatched array
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for (var j = 0; j < notmatched.length; j++) {
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if (notmatched[j] == guess[i]) {
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//console.log("exists", i, j, guess, notmatched)
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notmatched[j] = '-'
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ret += 2*mul
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break
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}
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}
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}
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mul *= 3
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matched = Math.floor(matched/2)
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}
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return ret
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}
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// converts the base 3 number into something that's readable
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function dump_match(v) {
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var ret = []
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for (var i = 0; i < 5; i++) {
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ret.push(v % 3)
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v = Math.floor(v/3)
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}
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return ret
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}
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function undump_match(l) {
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var mul = 1
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var ret = 0
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for (var i = 0; i < 5; i++) {
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ret += l[i]*mul
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mul *= 3
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}
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return ret
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}
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var all_matches_buffer = null
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var all_matches = null
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const precompute_all = (() => {
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var idx = 0
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return () => {
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const l = words.length
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if (idx == 0) {
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all_matches_buffer = new ArrayBuffer(l*l)
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all_matches = new Uint8Array(all_matches_buffer)
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}
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const start = Date.now()
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for (; (Date.now() - start) < 50 && idx < l; idx++) {
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for (var j = 0; j < l; j++) {
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all_matches[idx*l + j] = compute_match(words[idx], words[j])
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}
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}
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if (idx < l) {
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status("computing word " + idx + "/" + words.length + " " + words[idx])
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}
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if (idx >= l) {
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inited = true
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console.log("precompute done")
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status("precompute done")
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} else {
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setTimeout(precompute_all, 0)
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}
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}
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})()
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const LIST_END = (1<<16) - 1
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function calc_entropy_with_cache(valid_words, guess_idx, cache) {
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var entropy = 0
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cache.fill(0)
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const l = words.length
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var view = new Uint8Array(all_matches_buffer, guess_idx*l)
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var num_words = 0
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for (var i = 0; i < valid_words.length; i++) {
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if (valid_words[i] == LIST_END) break
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cache[view[valid_words[i]]] += 1
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num_words++
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}
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const log2 = Math.log(2)
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for (var i = 0; i < 5*5*5*5*5; i++) {
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if (cache[i] == 0) continue
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var prob = cache[i]/num_words
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//console.log("prob ", i, prob)
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entropy += -Math.log(prob)/log2*prob
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}
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return entropy
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}
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function calc_entropy(valid_words, guess_idx) {
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return calc_entropy_with_cache(valid_words, guess_idx, new Uint16Array(5*5*5*5*5))
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}
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function calc_best_word(valid_words) {
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var cur_best = -1
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var best_entropy = -1
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var cache = new Uint16Array(5*5*5*5*5)
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/*
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for (var i = 0; i < valid_words.length; i++) {
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if (valid_words[i] == LIST_END) break
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var entropy = calc_entropy_with_cache(valid_words, valid_words[i], cache)
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if (entropy > best_entropy) {
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cur_best = valid_words[i]
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best_entropy = entropy
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}
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}
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*/
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for (var i = 0; i < words.length; i++) {
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var entropy = calc_entropy_with_cache(valid_words, i, cache)
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if (entropy > best_entropy) {
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cur_best = i
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best_entropy = entropy
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}
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}
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return [cur_best, best_entropy]
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}
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function invalidate_words(valid_words, guess, match_result) {
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const l = words.length
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var view = new Uint8Array(all_matches_buffer, guess*l)
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var idx = 0
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for (var i = 0; i < valid_words.length; i++) {
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if (valid_words[i] == LIST_END) break
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if (view[valid_words[i]] == match_result) {
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valid_words[idx] = valid_words[i]
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idx++
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}
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}
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if (idx != valid_words.length) valid_words[idx] = LIST_END
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return idx
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}
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function gen_all_words_list() {
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var ret = new Uint16Array(words.length)
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for (var i = 0; i < words.length; i++) {
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ret[i] = i
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}
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return ret
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}
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function status(s) {
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document.getElementById('status').innerText = s
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}
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function log(s) {
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const elem = document.createElement('p')
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elem.innerText = s
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document.getElementById('log').appendChild(elem)
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}
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(() => {
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var req = new XMLHttpRequest()
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req.open('GET', 'valid-wordle-words.txt')
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req.addEventListener('load', e => {
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const text = req.responseText
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words = text.split('\n').map(line => line.trim())
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console.log("found " + words.length+ " words")
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})
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req.send()
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})();
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(() => {
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inited = false
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window.addEventListener('load', () => {
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document.getElementById('init').addEventListener('click', e => {
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if (!inited) {
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precompute_all()
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}
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})
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})
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})()
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</script>
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</head>
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<body>
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<div class="history" id="history">
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<div>
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<span class="letter match">W</span>
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<span class="letter exists">E</span>
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<span class="letter notincluded">A</span>
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<span>R</span>
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<span>Y</span>
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</div>
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</div>
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<form>
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<p>
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<input minlength=5 maxlength=5 size=5></input>
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</p>
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<p>
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<input type=button id="init" value="Init search"></button>
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<button id="clear">Clear history</button>
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<button id="submit">Submit word</button>
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<button id="confirm">Confirm word</button>
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<button id="find">Find best</button>
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</p>
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</form>
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<div id=status></div>
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<div id=log></div>
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</body>
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</html>
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