AutoSkill 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.

install

source · Clone the upstream repo

git clone https://github.com/ECNU-ICALK/AutoSkill

Claude Code · Install into ~/.claude/skills/

T=$(mktemp -d) && git clone --depth=1 https://github.com/ECNU-ICALK/AutoSkill "$T" && mkdir -p ~/.claude/skills && cp -r "$T/SkillBank/ConvSkill/english_gpt3.5_8/javascript-unique-random-number-generator-with-state-reset" ~/.claude/skills/ecnu-icalk-autoskill-javascript-unique-random-number-generator-with-state-reset && rm -rf "$T"

manifest: SkillBank/ConvSkill/english_gpt3.5_8/javascript-unique-random-number-generator-with-state-reset/SKILL.md

source content

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

Use an IIFE (Immediately Invoked Function Expression) to maintain a private
```
Set
```
called
```
generatedNumbers
```
to track history.
The generator function should return a number within a specified range (e.g., min to max).
Use
```
crypto.getRandomValues
```
to generate the raw random value.
Check if the generated number exists in the
```
generatedNumbers
```
Set. If it does, regenerate until a unique number is found.
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