Problem Statement
What is the difference between ValueKey and ObjectKey?
Explanation
ValueKey identifies widgets by comparing values using the equality operator (==), making it suitable when you have unique identifiable values like IDs, strings, or numbers. For example, ValueKey(user.id) uses the ID value to identify the widget, and two ValueKeys with the same ID value are considered equal.
ObjectKey uses object identity (identical() function) rather than equality, meaning two ObjectKeys are equal only if they reference the exact same object in memory. Use ObjectKey when you want to distinguish between objects that might have the same values but are different instances, or when working with objects that don't have meaningful equality operators.
Choose ValueKey when you have unique primitive values or objects with well-defined equality (like IDs), and ObjectKey when object identity matters more than value equality. In most cases, ValueKey is more commonly used because data typically has unique identifiers like IDs that make good keys.
