Tracking de l'application VApp (IHM du jeu)

VApp/node_modules/fast-unique-numbers/build/es2019/factories/generate-unique-number.js

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+/*
+ * The value of the constant Number.MAX_SAFE_INTEGER equals (2 ** 53 - 1) but it
+ * is fairly new.
+ */
+const MAX_SAFE_INTEGER = Number.MAX_SAFE_INTEGER === undefined ? 9007199254740991 : Number.MAX_SAFE_INTEGER;
+const TWO_TO_THE_POWER_OF_TWENTY_NINE = 536870912;
+const TWO_TO_THE_POWER_OF_THIRTY = TWO_TO_THE_POWER_OF_TWENTY_NINE * 2;
+export const createGenerateUniqueNumber = (cache, lastNumberWeakMap) => {
+    return (collection) => {
+        const lastNumber = lastNumberWeakMap.get(collection);
+        /*
+         * Let's try the cheapest algorithm first. It might fail to produce a new
+         * number, but it is so cheap that it is okay to take the risk. Just
+         * increase the last number by one or reset it to 0 if we reached the upper
+         * bound of SMIs (which stands for small integers). When the last number is
+         * unknown it is assumed that the collection contains zero based consecutive
+         * numbers.
+         */
+        let nextNumber = lastNumber === undefined ? collection.size : lastNumber < TWO_TO_THE_POWER_OF_THIRTY ? lastNumber + 1 : 0;
+        if (!collection.has(nextNumber)) {
+            return cache(collection, nextNumber);
+        }
+        /*
+         * If there are less than half of 2 ** 30 numbers stored in the collection,
+         * the chance to generate a new random number in the range from 0 to 2 ** 30
+         * is at least 50%. It's benifitial to use only SMIs because they perform
+         * much better in any environment based on V8.
+         */
+        if (collection.size < TWO_TO_THE_POWER_OF_TWENTY_NINE) {
+            while (collection.has(nextNumber)) {
+                nextNumber = Math.floor(Math.random() * TWO_TO_THE_POWER_OF_THIRTY);
+            }
+            return cache(collection, nextNumber);
+        }
+        // Quickly check if there is a theoretical chance to generate a new number.
+        if (collection.size > MAX_SAFE_INTEGER) {
+            throw new Error('Congratulations, you created a collection of unique numbers which uses all available integers!');
+        }
+        // Otherwise use the full scale of safely usable integers.
+        while (collection.has(nextNumber)) {
+            nextNumber = Math.floor(Math.random() * MAX_SAFE_INTEGER);
+        }
+        return cache(collection, nextNumber);
+    };
+};
+//# sourceMappingURL=generate-unique-number.js.map