Programmer Group

Python crawler, you can easily parse the page results by using beautiful soup. Here is the position information of the boss page using this method: including position name, salary, location, company name, company financing and other information. With this example, you can easily see how to use beautifulsop. import requests from bs4 import Beau ...

Refer to the first part for hardware construction: https://blog.csdn.net/qq_34472145/article/details/94561226 I. Preface In the previous part, the socket receives messages from MQTT server, while the server receives instructions from APP and converts them into customized messages and sends them to WiF ...

The most basic list in Delphi is TList class and TList < T > generic class, as well as thread safe TThreadList class and TThreadList < T > generic class. The underlying implementation is array. Go uses the container/list package, and the internal implementation is a two-way linked list. Delphi TList In TList, there is a pointer. Whe ...

Singleton mode Simply put, in an application, there is only one instance object of a class. You can't go to new because the constructors are decorated by private. Generally, they get their instances through getInstance(). The return value of getInstance () is a reference to an object, not a new instance, so don't misunderstand it as multiple ob ...

Preface After so many years of development, there must be a lot of small partners who can't figure out how to transfer various types of parameters. Many students are just using them and copying and pasting them. They are still confused when they encounter problems. posture Learn the correct posture of parameter transfer, first say how to ...

Some apps may make a lot of content into a high-definition picture to the mobile terminal for loading (our project is...), if the picture is small, it's OK, but if the picture is too large (we have more than 2M, MMP), it's either not displayed, or it's not always fuzzy. So what should we do? Use BitmapRegionDecoder to segment and then splice th ...

When the gateway and service are implementing the whole link distributed gray-scale publishing and routing, we need a tracking system to monitor which gray-scale group, which gray-scale version, which gray-scale area the gateway and service are going through, and even monitor the gray-scale rules and routing strategies that are passed from the ...

Why generics Efficiency, cost Reduce template code writing Classification of generics Generic class generic method Keywords of generics 3.1 T T represents any type, which can be any string, generally: T, U, S, E, K, V. T, U, S: any type E: element type of collection K, V: key and value types of Map 3.2 out Wildcard, equivalent to Java's & ...

First, the front end sends the token The location of token headers {'authorization': value of token ', content type': application / JSON} Write in ajax //Show only part of the headers code headers:{"authorization":this.$cookies.get("token")} //token value is usually put in cookies //The default is json format. You don't need to declare js forma ...

Catalog I. overview II. Renderings III. source code explanation 1. Source code structure 2. Header file 3. Add cursor 4. Monitoring movement 5. Move cursor 6. Other functions IV. test method 1. Test project 2. Test documents 3. Test co ...