Introduction to the initialization process of the Bluetooth protocol stack (taking CSR8311 as an example)

I. Statement We will continue to update this column by serialization. The planned update of this column is as follows: The first article: Comprehensive introduction to Bluetooth, mainly introduces some concepts of Bluetooth, its background, development track, introduction to Bluetooth on the market, and introduction to Bluetooth development ...

Posted by bumbar on Wed, 25 May 2022 22:44:40 +0300

[algorithm] the course schedule is not simple -- topological sorting

  introduction   >_< Now we need to arrange a timetable for the students (the learning order of the course) But it's not that simple:   curriculum Precursor course Course 0 Course 1 Course 0, course 4 Course 2 Course 3 Course 0 Course 4 Course 5 Course 3 Course 6 Course 3   Might as well draw a Graph and try i ...

Posted by noimad1 on Wed, 25 May 2022 22:41:14 +0300

Egret Mini Game Practical Tutorial Jump Jump (Handling 2)

Start page logic Since the start page is relatively monotonous, there is only one button to start the game, so we only need to add an event listener to the button The specific logic is that when the touch event occurs, we will add the SceneGame to the stage and remove the BeginScene from the stage The code of SceneBegin.ts is as follows: publi ...

Posted by tlavelle on Wed, 25 May 2022 21:58:45 +0300

Cache elimination algorithms LRU and LFU

Caching is a computer thinking. For repeated calculations, cache the results. The next time you calculate this task, you don't go to the real calculation, but directly return the results, which can speed up the processing speed. Of course, for some things that will change over time, the cache will fail and have to be recalculated. For example, ...

Posted by fiztec on Wed, 25 May 2022 21:58:16 +0300

138. Copy linked list with random pointer

138. Copy linked list with random pointer Given a linked list, each node contains an additional random pointer that can point to any node in the linked list or to an empty node. Ask to return a deep copy of this linked list. A deep copy means that the source object and the copied object are independent of each other, and changes to either objec ...

Posted by Iokina on Wed, 25 May 2022 21:50:30 +0300

spring boot: use redis+lua to limit the frequency of sending SMS verification codes (spring boot 2.3.2)

1. Why limit the sending frequency of SMS verification codes? 1, SMS verification code Each SMS has cost constraints, Certainly can not be brushed the random hair of the interface And the interface is brushed will affect the user's experience, Affect the normal access of the server, So even with the protection of graphic verification codes, etc ...

Posted by shashiku on Wed, 25 May 2022 21:42:39 +0300

[SSM framework] Spring notes - Spring overview; Detailed explanation of IOC control inversion

1. What is the Spring framework It is a container that integrates other frameworks. Its core is IOC and AOP. Spring framework consists of more than 20 modules, which provides excellent solutions in many fields.   2. Features of Spring 1) Lightweight It is composed of more than 20 modules. Each jar package is very small, less than 1M, and the ...

Posted by F1Fan on Wed, 25 May 2022 21:29:24 +0300

10 JavaScript snippets you can now use

There is no doubt that JavaScript is one of the most popular programming languages in Web development. Whether you use React, Vue or Angular, it's just JavaScript. An extensive and important ecosystem has been developed around JS, providing countless frameworks and libraries to help you develop applications faster. But sometimes it's best to st ...

Posted by Boerboel649 on Wed, 25 May 2022 21:22:40 +0300

ThingJS official demo: 3D visualization of underground pipelines to improve urban emergency response capacity

For cities, underground pipelines and their ancillary facilities are important infrastructure and lifeline to ensure the operation of cities. Now, in order to improve the construction and management level of underground pipelines, the demand for 3D visualization came into being. How to use thingjs to quickly generate pipeline visualization demo ...

Posted by jstgermain on Wed, 25 May 2022 21:12:15 +0300

Unit reads external resources

1. Dynamically read files in the editor In the actual game development, a considerable part of the static data can be placed on the client, so the demand for dynamic reading of these files naturally arises, such as csv, xml, etc. no matter what system is used for Unity development, if you want to achieve this effect, you obviously need to imple ...

Posted by nbalog on Wed, 25 May 2022 21:11:22 +0300