去重对象：my_list
数组格式：my_list: [
{code: 'code', name: 'name'},
...
]
let object = {}
let tmp = _this.my_list
_this.my_list = tmp.reduce((cur, next) => {
// eslint-disable-next-line no-unused-expressions
object[next.code] ? '' : object[next.code] = true && cur.push(next)
return cur
}, [])
