Programmer Think

prefaceAs we all know, kotlin is an android development language pushed by google to replace java kotlin is easy to use and has a lot of grammar This paper mainly explains some practical kotlin skillsCustom rounded rectangleIn projects, we often define rounded rectangular backgrounds, which are generally implemented with custom drawable Howe ...

MySQL transactions must meet the A (atomicity) C (consistency) I (isolation) D (persistence) principle. Among them, isolation is to minimize the impact of concurrent transactions on each other. The highest isolation level can ensure that concurrent transactions do not affect each other.   in the actual application process, in order to ada ...

Although most of my work is Java related development, I am exposed to Linux system every day, especially after using Mac. I work in the command line environment with black background every day I don't have a good memory. I can't remember many useful linux commands very well. Now I'll summarize them gradually for later viewing.basic operation Li ...

With regard to design patterns, if used properly, it will make our code more concise and extensible. This article mainly explains how to use policy pattern, factory method pattern and Builder pattern in Spring. 1. Strategy mode The usage of policy pattern is actually relatively simple in Spring. In essence, policy pattern is that there are mu ...

Reading harvest 👍🏻 Learn to customize spring boot starter👍🏻 Understand the principle of SpringBoot auto configuration Download the source code of this chapter ❤️Development starter❤️Test starter What is Starter Starter is a very important concept in Spring Boot. Starter is equivalent to a module. It can integrate the dependencies require ...

preface Spring is certainly no stranger to everyone. It is a barrier that every java developer can't get around. Spring framework provides a complete set of solutions for Java based enterprise applications, which facilitates developers to quickly carry out business development on the basis of the framework. On the official website, we found t ...

Introduction: Hello, Hello, do you like the iron juice duck with cartoon series as my avatar!!             I really like this (the original picture can also be a private letter to me, remember to pay attention to roar) but sometimes the avatar hasn't been changed for a long time 🤦‍♀️ You'll find a crash 😳 Alas, everyone seems to ...

Introduction: Hello, iron juice, a few days ago, it was snowing heavily in many cities ~ (Xiaobian in Hunan really didn't get too excited to see such heavy snow after a few years) I don't know if the lucky youyoumeng had fun snow? The snowball fight and the snowman wo are all played~ 😜😜 Skiing didn't come true, so this issue of Xiaobian wan ...

Although you have built an index on this column and the query criteria are also index columns, the final execution plan does not take its index. Here are some key points causing this problem. Column to column comparison In a table, two columns (ID and c_id) have separate indexes. The following query criteria will not go through the index ...

Another solution is to escape with a backslash before the newline character. var-kept: export foo<span class="token operator" style="margin: 0px; padding: 0px; list-style-type: none; border: none; color: rgb(166, 127, 89);">=</span>bar<span class="token punctuation" style="margin: 0px; padding: 0px; list-style-ty ...