Why two objects with the same hashcode are not necessarily equals?
878
What issues should be considered when overriding equals and hashCode in Java?
146601
Comparing two objects .
21013
Why are two identical objects not equal to each other?
13497
What is the best algorithm for overriding GetHashCode?
13934
Is there any difference between the `:key => "value"` and `key: "value"` hash notations?
106025
Why does `type which` say that `which is hashed`?
133348
Is isomorphism not always unique?
56094
Why use a prime number in hashCode?
128785
How can uniformity of hash functions (e.g. SHA-256) be proved?
70225
Do identical strings always have the same SHA-256 value?
26632
Why am I getting objects printed twice?
101173
Testing string equality using hashCode()
96429
How do hashes really ensure uniqueness?
47176
Strange, unexpected behavior (disappearing/changing values) when using Hash default value, e.g. Hash.new([])
124671
Why doesn't equality check work with arrays
74142
Why isn't `method=` treated the same as any other method?
136070
How do I compare two hashes in Perl without using Data::Compare?