Programmer Think

This article was originally written because there was an interview in the reboot group, and the written examination question had this question. I don't know how to do it, what kind of thinking, so I sent it to everyone in the group for discussion I've thought about it for a moment. Let's briefly talk about my idea. Of course, there is also a ve ...

When using external input method in email, the biggest problem is that when switching the email mode, there will be a delay for input, because you need to manually switch the input method to the corresponding English mode to use the shortcut keys normally. But if you use Emacs' own input function, you don't need to do these synchronizations. Yo ...

seata introduction Seata is Alibaba's open-source distributed transaction solution in 2019, which is committed to providing high-performance and easy-to-use distributed transaction services under the microservice architecture. Before the open source of Seata, the corresponding internal version of Seata played a role of distributed consistency M ...

Raspberry pie is a necessary toy for many hands-on people. In this section, let's take out raspberry pie, connect it to Microsoft cloud Azure's IoT Hub in 30 minutes, and then visualize the temperature and humidity curve. More content, please pay attention to the public number "cloud computing actual combat". For the complete operat ...

1. String Class 1.String classes are not mutable, that is, after a String object is declared 2.java.lang.String; is a string type (1) Once a string is created, it can no longer be changed, "abc" string object cannot be changed to "abcd" once it is created. (2) Enhance string access efficiency: Cache technology is used in the ...

Explain TouchId fingerprint recognition, FaceId face unlocking, collectively referred to as biometrics. Realization Introduce the Local Authentication Framework. If it's iOS 13, it's available by default. You don't need to re introduce it. import LocalAuthentication Check that biometrics are avail ...

Recently, I was looking at the hencoder custom view series of the throwing line. There is an icon turning the page and rotating the effect is cool. After thinking about it and seeing the thought of a great God, I finally made it. (GIF recorded a bit of card, the real effect can be run and viewed by yourself) thinking The w ...

There are several core points to implement an OAuth 2 service: OAuth 2 protocol analysis There may be many connected users, and the system needs to support horizontal expansion State control of access_token of each connected user: validity control Services should support fault tolerance, recoverability, scalability, high concurrency and other ...

Preface To be a great Android developer, you need a complete Knowledge System Here, let's grow up as we want. 1. Understanding the composition of Activity An Activity contains a Window object, which is implemented by PhoneWindow.PhoneWindow uses DecorView as the root View of the entire application window, and this DecorView divides the screen i ...

As a novice to Django, it is difficult for me to make an upload application in Django 1.3.I can't find any recent examples/snippets.Can someone publish a minimum but complete (model, view, template) sample code to do this? #1st floor I must say I find the documentation on django confusing.Also for the simplest example, why mention the fo ...