// Generate an RFC 4122 v4 UUID using the Web Crypto API
const uuid = () =>
    ([1e7] + -1e3 + -4e3 + -8e3 + -1e11).replace(/[018]/g, (c) =>
        (
            +c ^
            (crypto.getRandomValues(new Uint8Array(1))[0] & (15 >> (+c / 4)))
        ).toString(16)
    )

console.log(uuid())

One-line UUID v4

import { clsx, type ClassValue } from 'clsx'
import { twMerge } from 'tailwind-merge'

// Merge conditional class names and resolve Tailwind conflicts.
export function cn(...inputs: ClassValue[]) {
    return twMerge(clsx(inputs))
}

Tailwind cn() class merger

import time
from functools import wraps

def retry(times=3, delay=0.5):
    def decorator(fn):
        @wraps(fn)
        def wrapper(*args, **kwargs):
            last = None
            for attempt in range(times):
                try:
                    return fn(*args, **kwargs)
                except Exception as exc:
                    last = exc
                    time.sleep(delay * (attempt + 1))
            raise last
        return wrapper
    return decorator

Tags

#utils

One-line UUID v4

Tailwind cn() class merger

Python retry decorator