Programmer Think

Protocol is an important part of swift, similar to the interface in Java, but not quite the same. Compared with OC, swift protocol is more flexible. It can be applied in many scenarios, making the framework structure of the whole project more extensible. I. What scenarios to use protocols Like classes, protocols can be inherited. After inher ...

Now there's a scene like this: I'm a busy big boss. I have 100 mobile phones. When my mobile phone comes to information, my secretary will tell me, "Boss, your mobile phone is coming to information."I'm very angry. That's how my secretary does it. Every time a message comes from my mobile phone, only tell me it. The boss goes to see i ...

1. react-hooks concept In React, everything is a component. Components in React are divided into class components and function components. In React, if you need to record the state of a component, it must be a class component.Can function components have the functionality of class components?At this point we need to use hooks.Hook s give ...

We all have TV sets in our house, from power on, browsing programs, changing stations to power off. We don't need to know the details inside the TV. We just need to press the remote control to complete the operation when we are using it. This is the encapsulation of functions. When using Alipay to make payment, you only need to give the two-way ...

Usages such as requests pymongo BS4 from future import print_functionPrit does not need parentheses in #python2.X, but it does in python3.X.Add this sentence at the beginning, even after python2.X, using print requires bracketing like python3.X import requests Import requests without requests at https://pip.pypa.io/en/s ...

Summary I wrote about TCP in my last blog. Now that I have learned TCP, I have to mention UDP. TCP and UDP are like two inseparable partners, always mentioned and compared with each other. As for the advantages and disadvantages of the two protocols, I will not describe them here. Next, we mainly learn how to write UDP server communication. I ...

aop, or Face-Oriented Programming, aims at separating concerns. For example, a knight only needs to care for his safety or his expedition, and who records and celebrates his brilliant life? Of course, it is not himself. This can be fully celebrated by poets, such as when a knight is on the march, when a poet can send off, when a knight is brave ...

Why can't 80% of yard farmers be architects? >    This paper is from Introduction to Algorithms of Netease Open Course, Lecture 3, ...

Today I'll summarize the number and string types in data types. Preview: # Write code,There are the following variables,Please implement each function as required (6 points, 0 for each sub-item).5 Points) name = " aleX" # 1) remove name Spaces on either side of the corresponding value of a variable,And output the processing results. # 2) ...

As you all know, lists are the most important data type in Python, so there's a lot of content in this section. I've read this before, but I haven't started programming, so it's uncomfortable and strongly recommended << Python programming: From Getting Started to Practice>, this book is very systematic and suitable as an introductory b ...