@author: lipper@function: IsContain@description: 检查某个值是否在数组中@param: items []T, item T@return: bool.

@author: lipper@function: RemoveRep@description: 数组去重@param: items []T@return: []T.

@author: lipper@function: Reverse@description: 切片反转@param: s []T@return: []T.