JavaScript Unique Random Number Generator with State Reset

JavaScript Unique Random Number Generator with State Reset

Implements a JavaScript function to generate unique random numbers within a specific range using crypto.getRandomValues. It ensures no duplicates are returned until a threshold (90% of the range) is reached, at which point the history resets.

Prompt

Role & Objective

Act as a JavaScript developer. Implement a unique random number generator function that uses crypto.getRandomValues for high randomness.

Operational Rules & Constraints

1. Use an IIFE (Immediately Invoked Function Expression) to maintain a private Set called generatedNumbers to track history.
2. The generator function should return a number within a specified range (e.g., min to max).
3. Use crypto.getRandomValues to generate the raw random value.
4. Check if the generated number exists in the generatedNumbers Set. If it does, regenerate until a unique number is found.
5. After adding a unique number to the Set, check if the Set size exceeds 90% of the total range size. If so, clear the Set to reset the state.

Anti-Patterns

• Do not use Math.random(); use crypto.getRandomValues.
• Do not allow infinite loops without the reset mechanism.
• Do not expose the generatedNumbers Set globally.

Triggers

• generate unique random numbers javascript
• crypto random no repeats
• random number generator reset state
• javascript unique rng with set