Programming VIP

preface Whether students or people who have worked, I think they all have the same dream: enter a big factory! Seeing that 2021 is half past, how can we overtake at the corner in the second half of the year and enter the dream factory First of all, you should know that now, whether large or small companies, the interview investigation is not ...

This article is based on: androidx.databinding:databinding-runtime:3.4.1 1. Introduction to Data-Binding A data binding library is a supporting library that allows you to bind interface components in a layout to data sources in your application using declarative formats rather than programmatically. Detailed documentation reference: https:/ ...

Symbol 1. Symbol usage let s = Symbol(); console.log(s); Symbol s will never be the same Symbol is a string that will never appear the same. When we declare the same variable, if it occurs repeatedly, only the variable declared for the first time will be printed. let a = Symbol(); let b = Symbol(); console.log(a == b); // false You can' ...

Ansible introduction Ansible, SaltStack and Puppet are configuration management system sAnsible ， and ， SaltStack ， are automatic operation and maintenance tools compiled by ， Python ， and both use module management. The difference is that ansible does not have a client (SSH channel transmission is used) while ， SaltStack ， has a client ...

database Basic concepts of database It is more convenient to manage the data in developmentPreviously, data was managed through IO flow Use the character stream to read one line of data at a timeEncapsulate the read data as an objectAdd multiple objects to the collectionTraverse the collection to determine whether the object is the object ...

Vue modifier The modifier is a half angle period " ”Indicates the special suffix used to indicate that an instruction should be bound in a special way <form v-on:submit.prevent="onSubmit">...</form> The. prevent modifier tells the v-on instruction to call event for the triggered event preventDefault() Event modifie ...

One of the main tasks of working with text data is to create many text-based features. People may want to find content in a specific format in the text, such as e-mail existing in the text, or telephone numbers in large text. Although it sounds cumbersome to implement the above functions, it can be made easier by using the Python regular ...

SSM framework integration SSM framework includes spring, spring MVC and Mybatis. Spring and spring MVC are both modules of the Spring Framework and do not need to be integrated. Just integrate Mybatis with spring 1, Integration concerns Application of Spring in web project When the web project starts, read ApplicationContext MXL configurat ...

Summary avformat_open_input(), which is used to open multimedia data and get some information. Its declaration is located in libavformat / avformat h. Main work 1) Through init_input opens the streaming media data, detects the most appropriate protocol type AVInputFormat of streaming media according to the probe, and sets the read/write/seek ...

Today, I share a few pieces of code commonly used in work and life, which are the most basic functions and operations, and most of them appear frequently. Many of them can be used directly or simply modified and can be put into their own projectsDate generationMany times, we need to generate dates in batch. There are many methods. Here are two ...