Programmer Think

background Because of the use of WebSocket's custom binary protocol in the project, it is necessary to convert the binary to Long type defined in the back-end service. The Number type in JavaScript, for its own reasons, does not fully represent Long-type numbers, so we need to store Long-type values in other ways. target In GitHub, there is an ...

When you first learned Python multithreading, searching for data on the web almost completely reflected that Python did not have a true sense of multithreading, Python multithreading is chicken ribs.It was not clear at that time, but the concept of python with a GIL interpreter lock was understood. Only one thread could be running at a time, an ...

Code address please github View If there is new content, I will update it regularly, and welcome you to star,issue and make progress together. 1. Where does our server render data come from? 1.1 How to write isomorphic components Sometimes the HTML structure generated by the server side is not perfect, sometimes it is not possible witho ...

Text view commands: hexdump, od, cat, tac, head, tail, more, lessText processing commands: tr, cut, wc, sort, uniq, rev, colrm, paste, diff, pathText View CommandhexdumpView the file and display it in ASCII code or hexadecimal, decimal, octal.hexdump [options] file... -b Single byte octal display -c Single byte character dis ...

This blog is mainly divided into three parts: 1. Interrupt initialization 2. Connection of vxbus architecture interruption 3. Interrupt Linking of Non-vxbus Architecture 1. Initialization of interruption Function calls: usrInit->sysStart->palInit->palDescInit() /* For easy viewing, the function is deleted here. * The palDescI ...

Index maintenance is an important task in the daily maintenance of database. In fact, the index maintenance of SQL Server mainly focuses on the following three issues. Overindexing Insufficient index Index fragmentation rate This paper also introduces some practical daily maintenance methods and tools from these three perspectives. Overindexi ...

Java 9 is coming, so we have to sort out Java 8. Official documents: http://docs.oracle.com/javase/specs/jls/se8/html/index.html I. Default and static methods of interfaces The method body can also be written in the interface. The class that implements the interface no longer enforces the implementation of the method, but only needs to add defa ...

Multi-column Layout of css3 Attributes and Realization of Waterfall Flow by JS Background: I planned to summarize the knowledge points of flex layout by myself before, and found myself unable to start. What's the reason? I reflected on it. The reason is very simple: less use, more time use percentage, floating and positioning solution. This al ...

Last article In this article, we will further understand the common methods of google benchmark. Index of this article Passing parameters to test cases Simplify the generation of multiple similar test cases Using parameter generator Passing parameters to test cases Previously, all our test cases accepted only one benchmark:: S ...

Teacher's Test Questions Three object classes Commodity category User class Order Category Commodities contain the following attributes: Commodity id Name of commodity item pricing Order, the order contains the following attributes: Order id username, the user name to which the order belongs items in the commodity array (where m ...