Created
February 9, 2024 15:13
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Simple method to get a random element from a map based on a weight
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| /** | |
| * | |
| * @param objects: A Map containing the objects to choose from, where the keys represent the objects and the values represent their respective weights. | |
| * @return Returns a randomly selected element from a Map, with selection probabilities proportional to each element's weight. | |
| * @param <T> A randomly selected element from the Map, or null if the Map is empty. | |
| */ | |
| public static <T> T getRandomWeightedElement(Map<T, Number> objects) { | |
| double sum = objects.values().stream().mapToDouble(Number::doubleValue).sum(); | |
| for (T item : objects.keySet()) { | |
| random -= objects.get(item).doubleValue(); | |
| if (random <= 0.0d) { | |
| return item; | |
| } | |
| } | |
| return null; | |
| } |
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