15 lines
286 B
JavaScript
15 lines
286 B
JavaScript
// https://www.codewars.com/kata/cycle-detection-floyds-the-tortoise-and-the-the-hare/javascript
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const floyd = function(f, x0) {
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let x = x0;
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let i = 0;
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const map = new WeakMap();
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while (!(x in map)) {
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map[x] = i++;
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x = f(x);
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}
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return [map[x], i - map[x]];
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}
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