quadratic-probing | 易学教程

Moving from Linear Probing to Quadratic Probing (hash collisons)

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问题 My current implementation of an Hash Table is using Linear Probing and now I want to move to Quadratic Probing (and later to chaining and maybe double hashing too). I've read a few articles, tutorials, wikipedia, etc... But I still don't know exactly what I should do. Linear Probing, basically, has a step of 1 and that's easy to do. When searching, inserting or removing an element from the Hash Table, I need to calculate an hash and for that I do this: index = hash_function(key) % table_size;

What is primary and secondary clustering in hash?

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问题 I am confused for the last few days in finding the difference between primary and secondary clustering in hash collision management topic in the textbook I am reading. 回答1: Primary clustering means that if there is a cluster and the initial position of a new record would fall anywhere in the cluster the cluster size increases. Linear probing leads to this type of clustering. Secondary clustering is less severe, two records do only have the same collision chain if their initial position is the

What is primary and secondary clustering in hash?

阅读更多关于 What is primary and secondary clustering in hash?

I am confused for the last few days in finding the difference between primary and secondary clustering in hash collision management topic in the textbook I am reading. Primary clustering means that if there is a cluster and the initial position of a new record would fall anywhere in the cluster the cluster size increases. Linear probing leads to this type of clustering. Secondary clustering is less severe, two records do only have the same collision chain if their initial position is the same. For example quadratic probing leads to this type of clustering. Primary Clustering is the tendency