对象数组的去重方法

let objArr = [
    {
        ‘msg‘:‘sdfsdf‘,
        ‘text‘ : ‘sdafasfdasdf‘
    },
    {
        ‘msg‘:‘sdfsdf‘,
        ‘text‘ : ‘sdafasfdasdf‘
    },
    {
        ‘msg‘  : ‘hello‘,
        ‘text‘ : ‘world‘ 
    },
    {
        ‘msg‘  : ‘js‘,
        ‘text‘ : ‘c++‘
    }
]
//对象数组的去重
function uniqObjInArray(objarray){
    let len = objarray.length;
    let tempJson = {
        
    };
    let res = [];
    for(let i = 0;i < len;i++){
        //取出每一个对象
        tempJson[JSON.stringify(objarray[i])] = true;
    }
    console.log("tempJson is ",tempJson);
    let keyItems= Object.keys(tempJson);
    for(let j = 0;j < keyItems.length;j++){
        res.push(JSON.parse(keyItems[j]));
    }
    return res;
}
let res3 = uniqObjInArray(objArr);
console.log("res3 is ",res3);