Programmer Help

When we use Redis as cache, one of the problems we need to consider is cache penetration. There are many types of cache penetration, and different types have different solutions. As one of the solutions, the bloon filter is used. The bloom filter is mainly used to determine whether an element is contai ...

C language uses suffix expression to parse string Recently, I wrote a parsing string in C language of 98 Standard, which is similar to eval function in JavaScript. It feels very practical (transplanted to calculator, you can draw F(X,Y)==0). I'd like to share with you that you can use it. Thank you ...

1.spring cache parsing 1.1.RedisCache and RedisCache Manager 1.1.1. Structure 1.1.2. Resolution RedisCache uses the RedisCacheWriter interface for reading and writing redis; RedisCacheWriter Differences between RedisCacheWriter and Cache interfaces: All methods need to specify a name, which ...

Design pattern What is design pattern Why learn design patterns Where design patterns come from Principles of design pattern Object oriented design principles Principle of single responsibility Principle of opening and closing Richter's principle of substitution Dependence Inversion Principle In ...

1, PropertyValuesHolder Reading this article requires the foundation of Android attribute animation in the previous article, so that you can understand what to say next. 1. Understanding and use PropertyValuesHolder is a method similar to ObjectAnimation, but with one target missing, it is the control to be executed. Look at the normal usage: a ...

character string String is a constant,String is also called constant string //All operations on strings return a new string (that is, the original string cannot be changed) // String exists in constant pool // The string itself does not change, but the reference address changes, which is equivalent t ...

Biological neuron and artificial neuron Before we understand the neural network, let's take a brief look at what biological neurons look like. The following figure is excerpted from Wikipedia: (because I'm not an expert, the explanation here is only used to understand where the artificial neuron simulates the biological neuron, which may not ...

Lambda expression The problem with anonymous classes is that if the implementation of an anonymous class is very simple, such as an interface with only one method, the syntax of an anonymous class may look clunky and unclear. In these cases, you usually pass an anonymous inner class object as a parameter to a method, such as what to do when som ...

Learning PyQt Because I love it. Content reference from ARCHi's blog 1, Object oriented creation GUI 1. Create a graphical interface according to the following format class Example(QWidget): # The above can be inherited from QWidget and QMainWindow, indicating that they are controls or main windows respectively ...

Name: Gong Zheng Place: Home Experiment time: March 25, 2020 Experimental items: Purpose and requirements of the experiment 1,...... 2,...... Experimental content Experiment exercise: 1. Simple description of the problem: simple description of the project 2 experiment code: it needs to use MARKDOWN to insert code. 3 problem analysis: (focus on ...