15 lines
376 B
JavaScript
15 lines
376 B
JavaScript
function chooseWeightedRandom(items, weights) {
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let i;
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let length = weights.length;
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weights = [...weights];
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for (i = 0; i < length; i++) weights[i] += weights[i - 1] || 0;
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const random = Math.random() * weights[length - 1];
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for (i = 0; i < length; i++) if (weights[i] > random) break;
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return items[i];
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};
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module.exports = chooseWeightedRandom; |