HashSet contains method, strange behavior
76854
When does HashSet 'add' method calls equals?
147440
Why does the Contains() operator degrade Entity Framework' Linq queries?
148944
How do you determine if two HashSets are equal (by value, not by reference)?
158749
List.Contains is not working as hoped
51487
How to call a method stored in a HashMap? (Java)
878
What issues should be considered when overriding equals and hashCode in Java?
110080
How to compare two hashmaps in java?
133055
Why do I need to override the equals and hashCode methods in Java?
64704
Behaviour of LinkedHashMap's keySet() and values() methods
64289
How does !!~ (not not tilde/bang bang tilde) alter the result of a 'contains/included' Array method call?
146732
How does a Java HashMap handle different objects with the same hash code?
72298
HashSet contains duplicate entries
140329
HashSet vs. List performance
106414
Classifying whether a collection of objects is a set
22337
How to test if a list contains another list?
12039
How to find an object with specific field values in a std::set?
88423
What is the difference between the HashMap and Map objects in Java?