Menu
I never need to store objects in a hash table. The reason is twofold:
The Equals() operation on the other hand is a very frequently used function.
Therefore I wonder whether it is necessary to implement GetHashCode (which I never need) when implementing the Equals function (which I often need)?
396
Why is it important to override GetHashCode ? It s important to implement both equals and gethashcode, due to collisions, in particular while using dictionaries. if two object returns same hashcode, they are inserted in the dictionary with chaining. While accessing the item equals method is used.
If you're implementing a reference type, you should consider overriding the Equals method if your type looks like a base type, such as Point, String, BigNumber, and so on. Override the GetHashCode method to allow a type to work correctly in a hash table.
GetHashCode() Method with Examples. This method is used to return the hash code for this instance. A hash code is a numeric value which is used to insert and identify an object in a hash-based collection. The GetHashCode method provides this hash code for algorithms that need quick checks of object equality.
If you don't override hashcode() then the default implementation in Object class will be used by collections. This implementation gives different values for different objects, even if they are equal according to the equals() method.
my advise - if you don't want to use it, override it and throw new NotImplementedException(); so that you will see where did you need it.
57
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
