Dictionary: Also called a hash table, the biggest feature is that the time complexity of finding the corresponding value through the key is O(1). How to use a list to implement a dictionary in Python? The biggest problem in using a list to implement a dictionary is to solve Hash conflict. What should you do if you get the same position in the list by calculating different keys? The simplest way is to use the zipper method. The zipper method is to add another list at each position in a list, so that even if there is a hash conflict, it can be stored in it. When the selected hash function is good enough and the number of num is large enough, This ensures that each list in the list has only one element. Calculate the location of the element based on the key, and then get the value to achieve O(1) time. class MyDict: def __init__(self, num=100): #Specify the list size &
1. Detailed example of zipper method implementation of dictionary
##Introduction: This article mainly explains in detail the example of zipper method to implement dictionary, which has certain reference value. Interested friends can refer to it
2. Detailed explanation Python uses the zipper method to implement the dictionary method sample code
##Introduction: This article mainly introduces the use of zippers in python This article provides a detailed example code for how to implement a dictionary. I believe it has certain reference value for everyone. Friends who need it can take a look below.
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Zip method to solve problems related to Hash node conflicts_PHP tutorial
Introduction: Zipper method to solve Hash nodes Conflict related issues. ? php /* * hash::zipper method solves the problem of hash node storage conflict * ::2014-07-02 * ::Small_Kind */ class small_hash { private $size = 20; // hash node size private $zone = null; // h4.
Python implementation of hash table##Introduction: Introducing a hash implemented in python Table, the method to handle conflicts is the open address method, the conflict expression is Hi=(H(key)+1) mod m, m is the table length. I will implement the more difficult zipper method later
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The zipper method solves problems related to Hash node conflictsIntroduction : The zipper method solves problems related to Hash node conflicts. ? php /* * hash::zipper method solves hash node storage conflict problem* ::2014-07-02 * ::Small_Kind */ class small_hash { private $size = 20; // hash node size private $zone = null; // h
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