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1. CausesThe reason why I pay attention to this is a question, which is described as follows:Given n points on a 2D plane, find the maximum number of points that lie on the same straight line.The main idea is to give me the X and Y coordinates of some points, find the line with the most points, and output the number of points on this lineSo I t ...

4.2.1. Bitwise operators 4.2.1.1 bit and& (1) Note: the bit and symbol are one &, and the two & & are logical and. (2) Truth table: 1 & 0 = 0 1 & 1 = 1 0 & 0 = 0 0 & 1 = 0 (3) It can be seen from the truth table that the characteristic of bit and operation is that only 1 and 1 are located, and the result is 1, ...

Catalog 1. Overview of firewalld 2. Differences between firewalld and iptables 3. The concept of firewalld region Fourth, firewalld firewall predefined nine zones 5. Firewall Data Processing Process 6. Configuration method of Firewall 1. Runtime Configuration 2. Permanent Configuration 7. Configuration method of firewalld 8. Common fi ...

Preface: without any fancy preface, it is a basic and practical thing. 1. Introduction to listener What is a web listener? Web listener is a special class in Servlet, which can help developers monitor specific events in the web, such as the creation and destruction of ServletContext, httpsession and ServletRequest; Creation, destruction an ...

preface This article is mainly written by vue2 0 source code Mixin mixing principle In the last article, we mainly introduced Vue Asynchronous update principle The core is to use nextTick to realize asynchronous queue. This article mainly includes Mixin mixing, which is a very key api in Vue. It plays an important role in merging options duri ...

catalogue 1, Container adapter 1. What is an adapter? 2, Introduction and use of stack and queue 1. Introduction to stack 2. Use of stack 3. Introduction to queue 4. Use of queue 3, deque's brief introduction (understanding) 1. Principle of deque 2. Defects of deque 4, Simulation of stack and queue 1. Simulation Implementation of st ...

Objective: to predict whether a college student can be admitted to the university according to the score. Methods: call the advanced optimization algorithm or write the gradient descent function (choose the learning rate and iteration times by yourself) Data: ex2data1 txt 1, Read in data. 1.1 INTRODUCTION Kit import numpy as np import pa ...

1 case 1 - automatic login 1.1 requirements and process introduction When the user directly accesses the login page (e.g. shopping cart page, order page, etc.), the user object of the last login is directly displayed. This function is the function of automatic login. If the user did not check auto login when logging in last time, the user wil ...

1, Introduction Vector quantization is defined as the process of encoding points in a vector space with a finite subset. In vector quantization coding, the key is the establishment of codebook and codeword search algorithm. For example, the common clustering algorithm is a vector quantization method. In the ANN approximate nearest neighbor sea ...

Cron timed task expression manual Cron expression is applied in Unix and Unix like operating systems to make scripts and tasks execute periodically and repeatedly. Cron expression has poor and rich expression ability and can meet various time expression needs. This page arranges some basic grammar and common examples for your reference. Basic ...