数组

          function shuffleArray(arr) {
  for (let i = arr.length - 1; i > 0; i--) {
    const j = Math.floor(Math.random() * (i + 1))
    ;[arr[i], arr[j]] = [arr[j], arr[i]]
  }
  return arr
}

        

          function uniqueBy<T, K extends keyof T>(array: T[], getKey?: K | ((item: T) => T[K])) {
  const result: T[] = []
  const keys = new Set()

  array.forEach(item => {
    const key = getKey ? (typeof getKey === 'function' ? getKey(item) : item[getKey]) : item
    if (!keys.has(key)) {
      keys.add(key)
      result.push(item)
    }
  })

  return result
}