How to get the difference between two arrays of objects in JavaScript

Question

I have two result sets like this:

// Result 1
[
    { value: \"0\", display: \"Jamsheer\" },
    { value: \"1\", display: \"Muhammed\" },
    { value: \"2\",         


        

Answer 1

Most generic and simple way:

findObject(listOfObjects, objectToSearch) {
    let found = false, matchingKeys = 0;
    for(let object of listOfObjects) {
        found = false;
        matchingKeys = 0;
        for(let key of Object.keys(object)) {
            if(object[key]==objectToSearch[key]) matchingKeys++;
        }
        if(matchingKeys==Object.keys(object).length) {
            found = true;
            break;
        }
    }
    return found;
}

get_removed_list_of_objects(old_array, new_array) {
    // console.log('old:',old_array);
    // console.log('new:',new_array);
    let foundList = [];
    for(let object of old_array) {
        if(!this.findObject(new_array, object)) foundList.push(object);
    }
    return foundList;
}

get_added_list_of_objects(old_array, new_array) {
    let foundList = [];
    for(let object of new_array) {
        if(!this.findObject(old_array, object)) foundList.push(object);
    }
    return foundList;
}