Algorithm {Find the area of the union of horizontal matrices} Find the area of the union of horizontal matrices Definition In two-dimensional space, find the area of the union of several matrices (side lengths parallel to the X|Y axis); Properties Algorithm Dynamic scan line ( O ( N ? l o g N ) O(N*logN) […]
Tag: find
Linear regression predicts Boston housing prices & the reason for loss is NAN & draws a scatter plot to find the relationship between features and labels
Boston house price csv file Link: https://pan.baidu.com/s/1uz6oKs7IeEzHdJkfrpiayg?pwd=vufb Extraction code: vufb Code %matplotlib inline import random import torch import matplotlib.pyplot as plt import numpy as np import pandas as pd import torch Get the data set from CSV # Load data, the first line is a useless line, skip it directly boston = pd.read_csv(‘../data/boston_house_prices.csv’,skiprows=[0]) # There […]
How to find and delete duplicate rows in MySQL?
How to find duplicate rows The first step is to define what rows are duplicates. Most of the time it’s simple: some of their columns have the same values. This example uses this definition. Maybe your definition of “repeat” is very complicated and you need to make some modifications to the sql. Data samples to […]
Easily search for GitHub treasures! Find your ideal project quickly with these tips
“Blogger Profile” Hello friends, my name is A Xu. Focus on sharing research related to artificial intelligence AI, python, and computer vision. ?For more learning resources, you can follow Gong-Zhong-hao: [Axu Algorithm and Machine Learning] to learn and communicate together~ Thank you guys for liking and following! “——Recommended Classics from Previous Issues——“ 1. Practical Column […]
Solving errors in web projects, java.io.FileNotFoundException: druid.properties (the system cannot find the specified file); [spring factory decoupling development]
When using Tomcat9.0, spring5.0 framework original factory class decoupling, druid-1.0.9jar version, JDK9, MSQL8 version database to simulate web page login case, an error message that the druid.properties file cannot be found appears, the details are as follows [Case code posted at the end]; Normally speaking, the configuration file is placed under the src directory, and […]
Spring-dependency injection findAutowireCandidates source code implementation
findAutowireCandidates() implementation 1. Find the names of all beans of type type in the BeanFactory. Based on the BeanDefinition, you can determine whether they match the current type without generating a Bean object. 2. Find the object whose key is type in resolvableDependencies and add it to result. 3. Traverse the beanName found based on […]
Data structure C language version-finding the critical path (pure C code)
Why is topological sorting needed? :The reason is because topological sorting can ensure that the dependencies of our activities are calculated in order, that is, the predecessor of a node must be before the node. Interface #include <stdio.h> #include <stdlib.h> #define MAX 65535 typedef struct Graph { char* vexs; int** arcs; int vexNum; int arcNum; […]
Regarding the problem of error report when building springboot2.x, the image cannot find the springboot package.
Error reason Today I got an error while learning springboot for the first time. When building springboot on 2023.10.31, springboot2 could only select version 2.7.17. After JDK selected the matching 1.8, I still got an error org.springframework.boot:spring-boot-starter. -parent:pom:2.7.17.RELEASE was not found in http://maven.aliyun.com/nexus/content/groups/public/ during a previous attempt. This failure was cached in the local repository […]
SolutionCouldn’t find meta-data for provider with authority
Today, when I reused the code related to installing the APK that I wrote before, an error occurred. That is because the higher version of Android requires a new FileProvider. New file_paths <?xml version=”1.0″ encoding=”utf-8″?> <paths xmlns:android=”http://schemas.android.com/apk/res/android”> <!– <root-path name=”root” path=”” />–> <files-path name=”files” path=”files” /> <cache-path name=”cache” path=”files” /> <!– <external-path name=”external” path=”files” />–> […]
Use BFS breadth-first search algorithm to find string similarity
Now there are two strings, mother and monster. To change mother into monster, each operation can only modify one letter, delete one letter, and add one letter. There are many editing paths to change monther into monster. We need Find the shortest edit path, because the similarity of these two strings is determined by the […]