The DatetimePicker component of vant-ui can only choose the year, month, day, hour, and minute. Maybe the component maintainer thinks that the selection of seconds is not useful, but today’s demand is to choose the year, month, day, hour, minute, and second, so the DatetimePicker component is encapsulated. Select the year, month, day, hour, minute, […]
SIMD Optimized Gaussian Elimination Algorithm
Article directory SIMD parallel optimization idea of Gaussian elimination algorithm Parallel Optimization Using NEON Instruction Set on ARM Platform Optimization Optimization Results Optimization of SSE/AVX instruction set on x86 platform Optimization Optimization Results The impact of memory alignment on SIMD parallel optimization Optimization Test Results SIMD Optimization of Special Gaussian Elimination Algorithm of Grobner Basis […]
The time complexity and space complexity of the algorithm
Article directory 1. Algorithm efficiency 2. Time complexity 3. Space complexity 4. Complexity oj topic Article content 1. Algorithm efficiency 1.1 How to measure the quality of an algorithm We can measure the quality of a car from the aspects of price, fuel consumption, etc., but which aspect should we start with to measure the […]
How to improve code efficiency – time complexity and space complexity – [C Language]
When we face a problem, there are many ways to solve it. Our current computer technology has reached a very advanced level, so when we use different methods to deal with problems, the time difference will not be obvious, and the memory difference is generally not felt when we have small problems, so we will […]
Python implements face recognition function
Python implements face recognition function I’m free, let’s record the small face recognition project I learned a few days ago. In order to realize face recognition, we must first understand, what are the main steps of face recognition? In order to improve the accuracy of face recognition, we must first detect the faces in the […]
Python Web Development Tips VII
Directory decorator inject_serializer Decorator @atomic rebase git cleans up the data of add View the current working directory of git makemigrations file name @action(detail=True, methods=[“GET”]) How to take only one field of the serializer and return it What is the difference between Response and JsonResponse How to write the serializer to fill in the form […]
Add Native system service callback
Source code download address for this article: https://github.com/yuandaimaahao/AIDLCppCallbackDemo First of all, we need to make it clear that whether calling the server from the client or calling back the client from the server is essentially cross-process communication, which requires the help of the binder framework. Next, we will introduce the sample program in the aidl-cpp […]
[C language] Creation and destruction of function stack frames
Hello everyone, I am deep fish~ Directory 1. Register 2. Stack area 3. Creation of function stack frame 1. Open up a stack frame for the main function 2. Create variables in the main function 3. Preparations before calling the Add function 4. Create a stack frame for the Add function 5. Create variables and […]
codeforce div3 1851(E-G)
Problem – E – Codeforces It should be noted that this sentence means that drug i cannot be synthesized directly or indirectly through drug i. In other words, there is no ring. If you understand this condition, this question is very simple We can use recursion + dp thinking. For each medicine, we can synthesize […]
Docker installs InfluxDB and integrates SpringBoot
Foreword: The first part of the tutorial on the Internet is uniform and uneven, so I decided to sort out the basic installation of InfluxDB by myself. The basic introduction of InfluxDB will not be repeated. Docker install InfluxFB If you don’t have a Docker environment, you can move: Linux installation Docker (with Redis, MySQL […]