JAVA Foundation (day 7) nested for loop while do while

1 nested for loop 1.1 general There are at least two for loops. Judge whether the inner layer can be executed according to the conditions of the outer layer If it can be executed, loop the inner layer code, and then continue to judge whether to execute the next loop of the outer layer loop 1.2 nested for m   1.3 exercise: nested for loop ...

Posted by Saviola on Sun, 07 Nov 2021 14:42:30 -0800

Multithreaded learning

1, Java Memory Model JMM is the Java Memory Model, which defines the abstract concepts of main memory and working memory. The bottom layer corresponds to CPU register, cache, hardware memory, CPU instruction optimization, etc. JMM is reflected in the following aspects: 1. Atomicity - ensure that the instruction will not be affected by thread co ...

Posted by miro on Sun, 07 Nov 2021 14:33:22 -0800

[medical image processing] 5 basic operations between images (point, arithmetic and geometric operations)

   1 point operation    features: the input image and output image are point-to-point copy operations. In this copy process, the gray value will be converted. This conversion operation can be linear or nonlinear. It can be expressed as:    application: contrast enhancement, contrast stretching, image gray translation ...

Posted by AdRock on Sun, 07 Nov 2021 14:22:04 -0800

Dapr publish / subscribe

preface  Previous article This article will learn about the state management of Dapr, and this article will continue to learn about the subscription / publication building blocks. 1, Definition: The concept of publish and subscribe comes from the design idea of event driven architecture (EDA), which is a main way to decouple programs (applicat ...

Posted by DoctorWho on Sun, 07 Nov 2021 14:15:57 -0800

Leetcode 5921. Maximize the path value anonymous function dfs or bfs with bitset in a graph

5921. Maximize the path value in a graph meaning of the title Here is an undirected graph with n nodes numbered from 0 to n - 1 (both included). At the same time, give you an integer array values with subscript starting from 0, where values[i] is the value of the ith node. At the same time, give you a two-dimensional integer array edges with su ...

Posted by balacay on Sun, 07 Nov 2021 13:56:59 -0800

SRE operation and maintenance engineer's notes - Linux user group and permission management

Users, groups, and permissions Content overview Security model of LinuxUser and group related filesUser and group management commandsUnderstand and set file permissionsDefault permissionsspecial competenciesFile access control permissions 1. Linux Security Model Resource allocation: Authentication: authentication to verify the user's i ...

Posted by cerin on Sun, 07 Nov 2021 13:54:44 -0800

Generic tree traversal C# detailed tutorial

1, Foreword Purpose of this article Build a custom generic TreeDefine the enumerator of this class to realize sequential traversalUse get accessor to realize the middle order, post order and sequence traversal of the tree development environment Operating system: Windows 10 X64SDK: NET Framework 4.7.2IDE: Visual Studio 2019 2, Interpretat ...

Posted by ethan89 on Sun, 07 Nov 2021 13:27:22 -0800

java to import and export excel, read object pictures, and upload qiniu cloud

java implementation of excel import and export and solution Because of the company's business requirements, excel uses the MultipartFile class to import and export tables , here are some key codes. I hope they can help //To obtain the input stream of excel file, it must be. Xlsx suffix. If it is xlsx suffix, use HSSFWorkBook X ...

Posted by erokar on Sun, 07 Nov 2021 13:25:03 -0800

Python file operations and modules - Python Day11

catalogue 1. File opening and closing 2. Document reading and writing 3. Application: file backup script 4. Document positioning 5. Module introduction 6.os module operation file 7.time and datetime modules 8. Module production, release and installation   Reading guide File operation is a very common function. Of course, we also ...

Posted by Sangre on Sun, 07 Nov 2021 13:06:13 -0800

[UE4] use StreamableManager to load resources

[UE4] method of loading resources (VI) using StreamableManager for loading References & original links TAssetPtr and FStreamableManager of AssetManager series UE4 resource loading method Unreal4 load resources asynchronously (ue4.20) UE4 synchronous loading and asynchronous loading uobject ------------- loadobject, loadclass, fstreamableman ...

Posted by Loriq on Sun, 07 Nov 2021 12:59:00 -0800