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3 useful things

Validates if email address format is correct

function validateEmail(email) {
  const regex = /^[^s@]+@[^s@]+.[^s@]+$/;
  return regex.test(email);
}

Validate password strength with configurable rules

function validatePassword(password, options = {}) {
  const defaults = {
    minLength: 8,
    requireUppercase: true,

Validate function arguments and return values using type hints and custom validators.

import functools
import inspect
from typing import Any, Callable, Dict, List, get_type_hints

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