unable to insert a new key value pair to the existing pair

Question

We have name value pair field in our table.These field can be modified ie either existing values can be changed or a new pair might get added . We have written the below script to update existing values . Please help on how to add ,new pair to the existing .

for (var name in u_service_characteristics) {
    if (parsed.service_characteristics[name] != null &&
        parsed.service_characteristics[name] != undefined) {
        u_service_characteristics[name] = parsed.service_characteristics[name];
    }
}

Above code only modifies the existing names ,how to insert if the incoming name doesnt exist.

Answer 1

无需遍历目标的键，而只需遍历源的键：

for(var name in parsed.service_characteristics)

Answer 2

I am guessing this is what you need

var existings = Object.getOwnPropertyNames(u_service_characteristics);
for (var name in parsed.service_characteristics) {
    if (!existings.includes(name)) {
        u_service_characteristics[name] = parsed.service_characteristics[name];
    }
}