Programmer Think

1. In development, sometimes some small triangles are used to emphasize or mark elements, so as to distinguish different items, and then draw the triangles into a more obvious color to achieve the effect. How can we draw triangles? I didn't know before. Recently, I saw some web pages being used and marked, They all use background pictures for m ...

1 logistic growth model 1.1 J-type growth and S-type growth Exponential growth, J-shaped curve: exponential growth, that is, the growth is not restrained and explosive. For example, one person can infect three people, three people can infect nine people, and nine people can infect 27 people, which keeps doubling. This is J-type growth, ...

In many cases, we do need to access multiple data sources in one service. Although it makes the overall design less elegant, the real world does need it. For example, your business serves two larger customers, but you want them to share a set of code.In other words, your code didn't consider the function of multi tenancy at the beginning, but t ...

principle We can use java to develop apps, or use Java and C|C + + to develop apps. NativeActivity provides support for developing apps using C|C + + alone. From the perspective of developers, we are developing app s in C + + alone, but from the bottom, we still can't do without Java. In the android source code, an intermediate class has bee ...

Go MySQL operation Install: go get - u GitHub com/go-sql-driver/mysql The operation database driver of GO language supports connection pool and is a standard library for concurrency security. There is no specific implementation, but lists the specific contents of some third-party libraries that need to be implemented //Successfully connected t ...

Related links CSDN_GroupiesM notes sorting No.3.1_25 JavaSE-JDK8 new feature P1 [Lambda expression]No.3.1_26 JavaSE-JDK8 new feature P2 [Stream stream] operation setNo.3.1_27 JavaSE-JDK8 new feature P3 [Optional container class] handles null valuesNo.3.1_28 JavaSE-JDK8 new feature P4 [Date] API No.3.1_ 28_ 5. Detailed explanation of Ch ...

1.Shell condition test 1.1. Numerical comparison: Operator: gt: greater thanlt: less thaneq: equal tone: not equal toge: greater than or equal tole: less than or equal to Test syntax: Mode 1: test conditional expression [root@VM-0-17-centos ~]# test 8 -ge 2 / / no value is returned when the command is executed directly [root@VM-0 ...

The whole blog is a correction book at the end. The code is all right and can be simulated normally 1. Introduction to FIFO FIFO-IP call. 2. Synchronous FIFO A clock is used for reading and writing Module implementation Module block diagram Port introduction: sys_clk: 50MHz system clocksys_rst_n: System reset, low effectivewr_e ...

1, Container technologyBefore the emergence of virtual machine (VMware), due to the dependency of application deployment, new applications often need to be deployed on independent servers, resulting in low utilization of hardware resources. The emergence of VMware perfectly solves this problem.However, VMware also has shortcomings. First, VMwar ...

1, Branch statement 1.if statement Conditional statement, which determines whether to execute its statement block according to the value of the expression Syntax: if (Boolean expression) { <Statement block> } Common Boolean expression operators: == > < >= <= != && || ! Code example: int num = ...