问如何在javascript (特别是旧的javascript中)动态设置或更改对象的属性名称

EN

var arr = []
var a = "newAttributeName";
var obj2 = {"msg": "hello"};
arr.push({a: obj2});

console.log(JSON.stringify(arr));

var parentObj =  
    [
        {"clientid": 0, "name": "Mike"}, 
        {"clientid": 1, "name": "Alan"}, 
        {"clientid": 3, "name": "Peter"},
        {"clientid": 4, "name": "Anna"}
    ];

var childObj =  
    [
        {"address": "address info 1", "clientid": 0}, 
        {"address": "address info 2", "clientid": 1}, 
        {"address": "address info 3", "clientid": 4},
        {"address": "address info 4", "clientid": 3},
        {"address": "address info 5", "clientid": 3}
    ];


console.log(JSON.stringify(buildNested(parentObj, childObj, "givenName", "clientid")));


function buildNested(parentObj, childObj, dynamicName, matchId) {

    var nested = parentObj.reduce(function(acc, item) {
        acc.push(
            Object.assign({}, item,
                {
                    dynamicName_: buildObject(childObj, item, matchId)
                }
            )
        );
        return acc;
    }, []);

    // **** here is the circumvent-solution ****
    nested = JSON.stringify(nested);
    return nested.replace(new RegExp( dynamicName_, 'g' ), dynamicName);
    // ***************************************
}

function buildObject(childObj, parent, matchId) {
    var filtered = childObj.filter(function(x) {
        if (x[matchId] === parent[matchId]) {
            return x;
        }
    })  
    return filtered;
}