I have two JSON objects, original and current.
The original object was created by reading a configuration file, it have a certain specific keys.
The current object was created as a copy of original, then there are keys added to current, as well as updates to other keys from original.
Now I want to copy back from current to original, but only the keys that exists in original. In other words, I don't want the new keys that was added to current.
For example, lets say original is:
{
"foo": "hello"
}
And current is:
{
"foo": "world",
"bar": "some other stuff"
}
After updating original only the "foo" key should have been updated:
{
"foo": "world"
}
The "bar" key is not copied.
Using the nlohmann-json library, is there a simple way to solve this? Or do I have to iterate over original and explicitly copy those keys from current?
