As a cached database, Redis currently has a large usage in the market. Most people use its string format storage in their work. For the rest of the data structure, it is rarely used. The basic data structure of Redis includes: string, hash, list, set, sorted set. These five data structures are often used in different scenarios in ...
Added by MatrixGL on Sat, 12 Feb 2022 20:35:22 +0200
Intersection of two unidirectional linked lists
There are two one-way linked lists. They may or may not intersect. If it intersects, it returns the intersecting node; if it does not intersect, it returns null.
There are only three cases when two one-way linked lists intersect.
The problem of linked list intersection is ...
Added by soniared2002 on Thu, 10 Feb 2022 19:01:03 +0200
Set set: specifically reflected in the non repeatable nature. The feature of this set is that it will not store duplicate elements and will store unordered elements (the order of storage and retrieval is not necessarily the same)
hashset: it is a classic implementation class of set. The bottom layer is implemented by using the key val ...
Added by HAVOCWIZARD on Wed, 02 Feb 2022 06:17:00 +0200
1. What is a lookup table
** In daily life, we have to do some searching work almost every day, looking up someone's phone number in the phone book; Find a specific file in the folder of the computer, and so on. This section mainly introduces the data structure used for lookup operation - lookup table.
A lookup table is a collection of da ...
Added by zedd2006 on Mon, 10 Jan 2022 08:21:42 +0200
350. Intersection of two arrays II
Given two arrays, write a function to calculate their intersection. Example 1:
Input: nums1 = [1,2,2,1], nums2 = [2,2] Output: [2,2] Example 2:
Input: nums1 = [4,9,5], nums2 = [9,4,9,8,4] Output: [4,9]
The number of occurrences of each element in the output result shall be consistent with the m ...
Added by LoStEdeN on Fri, 31 Dec 2021 03:22:10 +0200
1, Overview of classes and interfaces
Advantages and functions of Java collection framework
Using a mature collection framework helps us write efficient and stable code conveniently and quicklyLearning the data structure knowledge behind it will help us understand the advantages, disadvantages and usage scenarios of each collection
Added by DylanBlitz on Wed, 01 Dec 2021 12:14:45 +0200