1. Requirement background Query the list of work orders initiated by me and invited by me. It requires paging query. The specific requirements for sorting are: Sort by status first, with unprocessed items at the front Then sort by handler, those who were invited are ranked first, and those who initiated themselves are ranked last. […]
Tag: sorting
Binary search tree (BinarySearchTree/BSTree), also called binary sorting tree or binary search tree
1. Definition of binary search tree Binary search tree: a binary tree, which can be an empty tree; or meet the following conditions, at any node, 1. All key values of the non-empty left subtree are less than the key values of its root node; 2. All key values of the non-empty right subtree are […]
Design and analysis of computer algorithms-sorting and sequential statistics
On the one hand Chapter 1: Awakening In the year 2219, in the city of Chronos, Dr. Emily Reed awoke from a deep slumber, her mind filled with hazy memories of a past she could barely grasp. She found herself in a world where time was no longer a linear concept but rather an intricate […]
MySQL sorting, grouping, and Limit optimization strategies
Table of Contents 1. Two sorting methods in MySQL 2. Sorting optimization strategy 2.1 Add index to sorting field 2.2 You can create a joint index with the WHERT field 2.3 Optimize FilerSort sorting method 3. Group optimization strategy 3.1 Can WHERE but not HAVING 3.2 Reduce ORDER BY, GROUP BY, DISTINCT 3.3 Follow the […]
Paging and dynamic sorting of List through Stream
Article directory Paging and dynamic sorting of List through Stream Maven dependencies used ListUtil code test test code result Paging and dynamically sorting List through Stream During development, some scenarios require paging or sorting data according to a certain field. This can usually be done in the database. However, business requirements often require more business […]
Quicksort——an elegant sorting algorithm
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“One post to the soul” This article explains the quick sorting algorithm thoroughly
Table of Contents Quick sort core idea Quick sort graphic example Quick sort code implementation Quick sort complexity Quick sorting core idea 1) Select a pivot element (pivot), usually the first element or the last element. 2) Scan from the left and right ends of the array to the middle. Set two pointers left and […]
Advanced Python Algorithms: Bucket Sorting and Radix Sorting
Advanced Python Algorithm: Bucket Sorting and Radix Sorting Introduction What is bucket sort? Basic steps of bucket sorting Example of bucket sort What is radix sort? Basic steps of radix sort Example of radix sort Application of bucket sorting and radix sorting Application of bucket sorting Application of radix sort Python sample code Summary Introduction […]
Algorithm design and analysis—–sorting algorithm
1. Selection sorting The worst and average time complexity of insertion sort are both ) #include<iostream> using namespace std; //Implement selection sorting //The worst-case and average-case time complexity are both O(n^2) //Sort in place, space complexity is O(1) int main() { int arr[10] = { 23, 6, 1, 6, 45, 20, 15, 36, 5, 24 […]
Data structure sorting algorithm (simple selection, fast, half insertion sorting)
Table of Contents 1. Simple selection sorting 2. Quick sort 3. Half-way insertion sort 4. Data analysis 5. Source code analysis 1. Simple selection sort //Simple selection sorting void selection_sort(zstu &S,int sum){ bool desc; cout<<“Please enter the sorting method (1 means from high to low and vice versa 0….):”<<endl; cin>>desc; for(int i=0;i<sum-1;i + + ){ […]