Programmer Group

catalogue 1, Properties of commonly used elastic boxes 1. flex container 2. flex project 3. Arrangement direction 4. Properties of the flex container 5. Project properties (itme) 6. Grail layout   7. Length units in CSS 2, Use of multimedia tags in HTML5 1. Format of video file 2. Usage of Video Tags 3. Audio format file 4. Ho ...

This is an upgrade of the last encapsulated table, adding multi-level header and column consolidation functions. I put the code and reference articles at the bottom. Let's put some important nonsense on it, mainly my summary. You can take a look or slide directly to the code below. This time it's just a record to make it convenient for the futu ...

        Recently, a code scanning gun will be integrated in the project, and I will be responsible for docking. I have to say, this code scanning gun is really the most annoying I've ever seen. The first is the hardware, which needs to be assembled by yourself, and then the network cable needs to make one to connect to thei ...

preface In the last article, I mainly explained Detailed explanation of Groovy classes, methods and closures, In this article, we will explain Groovy's dynamic features and metaprogramming in detail. 1. Groovy dynamic features Speaking of dynamic characteristics, in the first article Understand Gradle and automated build In, it is just a bri ...

Shiro address: https://shiro.apache.org/ reference resources: Crazy God says Java Springboot 1, Construction project 1.1 configuration dependency Select the Springboot project to build, and select the web and thymeleaf templates. Spring boot starter thymeleaf, spring boot starter web and spring boot starter test will be imported automati ...

Basic introduction Flowable definition Flowable is a lightweight business process engine written in Java and open source using Apache V2 license protocol. In October 2016, the main developer of Activiti workflow engine left Alfresco and started the flowable open source project on the basis of Activiti branch. The first Flowable release ve ...

1. Continuous characteristics: Frequent releaseAutomated processRepeatableFast iteration 2. Purpose of continuous integration: The team is developed by multiple people. Everyone can submit code independently. Continuous integration can be verified by automatic construction (including compilation, release and automatic testing), so as to find ...

preface When creating a table, you can add corresponding constraints to the fields of the table. The purpose of adding constraints is to ensure the legitimacy, validity and integrity of the data in the table. Common constraints nameexplainNon NULL constraint (not null)The field of the constraint cannot be NULLUnique constraintConstrained ...

search 1. Sequential search Through subscripts, we can access and search data items in order. This technology is called "sequential search" def sequentialSearch(alist,item): pos = 0 found = False while pos<len(alist) and not found: if alist[pos] == item: found = True else: ...

1, Foreword In previous articles, I mentioned that I have been doing things related to sql injection recently, and I have also been doing problems related to sql injection. However, in fact, many competition questions have different test sites. They often need to combine other knowledge to get the desired results. The following question is the ...