Allowing use of the index in combination with other data react/no-array-index-key

[tomprats]

This is similar to why #1124 was added but I was wondering if it'd be possible to update this rule instead of just to disable it. Here's an example:

names = ["Tom", "Joe", "Tim", "Tom"];
names.map((name, index) => (<li key={`${name}-${index}`}>{name}</li>));

In a list like this, sometimes the data isn't unique by itself, but it is when combined with it's position.

Would it be possible to update the rule to allow cases like this?

[ljharb]

If you're using the index, then using other data adds zero value - just use the index. If you can only use the other data, then don't use the index.