//判断是否为一个数组
export const isArray = Array.isArray

export const isObject = (val: unknown) =>
  val !== null && typeof val === 'object'

/**
 * 对比两个数据是否发生改变, 如果发生改变则返回true
 */
export const hasChanged = (value: any, oldValue: any): boolean =>
  !Object.is(value, oldValue)

export const isFunction = (val: unknown): val is Function => {
  return typeof val === 'function'
}

export const extend = Object.assign