Cross-domain issues Cross-domain refers to requesting the resources of another domain name from a web page of one domain name, such as currently requesting the JD server (https://www.jd.com) on the Baidu page (https://baidu.com) Resources Traditional requests will not cross domains On the a site, you can submit it through hyperlink or form form or window.location.href […]
Tag: dom
[Update] C language simply simulates Gaussian ants: random walk problem (compressed version)
At the request of some people, the number of lines of code has been violently compressed. If it is not easy to read, please see [Update] C language to simply simulate Gaussian ants: random walk problem #define _CRT_SECURE_NO_WARNINGS #include <stdio.h> #include <string.h> #include <stdlib.h> #include <math.h> #include <Windows.h> #include <time.h> #include “unistd.h” #define NumberOfAnts 100///Constant […]
DOM node operations & M-side events
1. What is a DOM node? 1.1. DOM node: Each content in the DOM tree is called a node. 1.2. Classification of DOM nodes : Element node such as div tag Attribute node such as class attribute Text node For example, the text in the label ? 2. Find nodes Any node in the DOM […]
C++ binary algorithm: random numbers in blacklist
Involving knowledge points binary search Title Given an integer n and a non-duplicate blacklist integer array blacklist . Design an algorithm to select an integer that is not included in the blacklist from any integer in the range [0, n – 1]. Any integer in the above range that is not in the blacklist should […]
Simple HTTP service to implement random return of directory pictures and HTML to implement Web page design (experiment summary)
1. HTTP service for returning random pictures Implement the configuration environment: python, flask package (install with pip command or directly search for it in the ide and install it directly) Create a flask project directly in python and put the code from flask import Flask app = Flask(__name__) import os import random from flask import […]
Pseudo-random sequence-m sequence and MATLAB simulation
Article directory Preface 1. m sequence 1. Generation of m sequence 2. Properties of m sequence ①.Balance ②. Run distribution ③、Shift addition characteristics ④.Autocorrelation function ⑤.Power spectral density ⑥. Pseudo noise characteristics 2. M sequence 1. Generation of m sequence 2. Properties of m sequence 3. m sequence in MATLAB 1. MATLAB code of m […]
Decision tree: the path of wisdom from root to leaf
Article directory Preface 1. What is a decision tree? 1. Classification trees and regression trees 2. Basic concepts 2. Basic algorithmic ideas of decision trees How to choose the splitting condition of a certain node? 1. Information Entropy 2. Information Gain (ID3 algorithm) 3. Gain Ratio (C4.5 algorithm) 4. Gini Index (CART algorithm) When to […]
SpringBoot solves cross-domain problems/Nginx configuration solves cross-domain problems
Solving cross-domain issues Foreword Cross-domain issues are an unavoidable problem in web development. We must first understand these points. 1. Cross-domain only exists with the browser and does not exist with other environments such as Android/iso/js/java and other environments. 2. Cross-domain requests can be sent, and the server can receive the request and return the […]
[Update] C language simply simulates Gaussian ants: random walk problem
Previous article Portal: C language simply simulates Gaussian ants: random walk problem (graphical) 1. Update content Note: The code shared in the previous article will not be repeated here. 1. Fixed coordinate system In C language, we can use printf to change the position of the cursor, thereby changing the starting position of printing. When […]
JavaScript dom (2)
Click event case <!DOCTYPE html> <html> <head> <meta charset=”utf-8″> <title></title> </head> <body> <button>Start roll call</button> \t\t \t\t <script> //The requirements are as follows: Click the button to display back and forth to start or stop roll call. //Idea: Get the button label, and then assign a click event to it. //Then judge the value inside […]