let filter_arrObj = [];
let arrObj = [
    {
        name: 'xiaoqing',
        age: 15,
        sex: 0
    },
    {
        name: 'xiaoming',
        age: 12,
        sex: 0
    },
    {
        name: 'xiaobai',
        age: 21,
        sex: 0
    },
    {
        name: 'xiaoqing',
        age: 25,
        sex: 0
    },
]
filter_arrObj = arrObj.filter((item, index, origin) => 
index === origin.findIndex(itemInner => {
return itemInner.name === item.name
}
))

findIndex() 方法返回传入一个测试条件（函数）符合条件的数组第一个元素位置。只返回第一个满足条件的索引值