32 lines
821 B
JavaScript
32 lines
821 B
JavaScript
// Permutations in js reference (also cool algorithm):
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// https://stackoverflow.com/a/41068709
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function perm(a){
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if (a.length == 0) return [[]];
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var r = [[a[0]]],
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t = [],
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s = [];
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if (a.length == 1) return r;
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for (var i = 1, la = a.length; i < la; i++){
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for (var j = 0, lr = r.length; j < lr; j++){
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r[j].push(a[i]);
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t.push(r[j]);
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for(var k = 1, lrj = r[j].length; k < lrj; k++){
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for (var l = 0; l < lrj; l++) s[l] = r[j][(k+l)%lrj];
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t[t.length] = s;
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s = [];
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}
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}
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r = t;
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t = [];
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}
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return r;
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}
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function setHTML(id, html) {
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document.getElementById(id).innerHTML = html;
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}
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function setValue(id, value) {
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document.getElementById(id).value = value;
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}
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