Eu crio sistemas reais.

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async function hashPassword(password) {
  const salt = crypto.getRandomValues(new Uint8Array(16));
  const key = await crypto.subtle.importKey('raw', new TextEncoder().encode(password), 'PBKDF2', false, ['deriveBits']);
  const bits = await crypto.subtle.deriveBits({ name: 'PBKDF2', salt, iterations: 100000, hash: 'SHA-256' }, key, 256);
  const saltHex = Array.from(salt).map(b => b.toString(16).padStart(2, '0')).join('');
  const hashHex = Array.from(new Uint8Array(bits)).map(b => b.toString(16).padStart(2, '0')).join('');
  return `pbkdf2$${saltHex}$${hashHex}`;
}

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public async canAccessOrganization(userId: string, organizationId: string): Promise<boolean> {
    const row = await this.database.prepare(`
        SELECT m.id
        FROM organization_memberships AS m
        INNER JOIN organizations AS o ON o.id = m.organization_id
        WHERE m.user_id = ? AND m.organization_id = ? AND m.status = 'active' AND o.is_active = 1
        LIMIT 1
    `).bind(userId, organizationId).first<{ id: string }>();

    return row !== null;
}

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_cache      = {}
_cache_lock = threading.Lock()

def cache_get(key):
    with _cache_lock:
        return _cache.get(key)

def cache_set(key, value):
    with _cache_lock:
        _cache[key] = value

def cache_invalidate(*keys):
    with _cache_lock:
        for k in keys:
            _cache.pop(k, None)

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<input type="file" accept="image/*" capture="environment"
       id="foto-input-${b.id}" style="display:none"
       onchange="window.previewFotoObrigatoria('${b.id}',this)"/>

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function sanitizeHtml(str) {
  if (!str) return '';
  const d = document.createElement('div');
  d.textContent = str;
  return d.innerHTML;
}