Item-by-item list comparison, updating each item with its result (no third list)

Category : Databases

The solutions I have found so far in my research on comparing lists of objects have usually generated a new list of objects, say of those items existing in one list, but not in the other. In my case, I want to compare two lists to discover the items whose key exists in one list and not the other (comparing both ways), and for those keys found in both lists, checking whether the value is the same or different.

The object being compared has multiple properites that constitute the key, plus a property that constitutes the value, and finally, an enum property that describes the result of the comparison, e.g., {Equal, NotEqual, NoMatch, NotYetCompared}. So my object mig

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