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The flitter widget of Flutter is also very powerful. It can make the magic filter effect you want. Here we will make a ground glass effect in the way of actual combat, and learn the use of Fitler through examples. The effect is as follows: do you know this teacher? Implementation process: I. pre ...

Figure after filter: Implementation principle: This uses a method of canvas: getImageData , this method can obtain the pixel information of the picture **CanvasRenderingContext2D**.getImageData(), return a ImageData Constructor to create or use the creation methods of the CanvasRenderingContext2D object with canvas: createImageData() and getIm ...

When the project is very large, if all the states are concentrated in one object, the thermal planet software development (T: I8O-285I-O282 V forest) store object may become quite bloated. To solve this problem, Vuex allows us to divide the store into modules. Each module has its own state, mutation, action, getter, and even nested submodules ...

Vue (voice / vju ː /, similar to view) is a set of progressive framework for building user interface. >Features: easy to use, flexible, efficient, progressive framework. >Modules that need to be used can be combined at will Vue + components + Vue router + vuex + Vue cli I. concept and characteristics of Vue 1. What is a library and what ...

Jar package for lock analysis: spring-beans-3.2.5.RELEASE.jar How to read configuration files XmlBeanFactory xmlBeanFactory = new XmlBeanFactory(new ClassPathResource("spring-test.xml")); This is not recommended in spring 4.0, instead: ClassPathXmlApplicationContext content = new ClassPathXmlApplicationContext("classpath:spring-test.xml"); ...

Catalog 1. Modify function function or class property 2. Modify environment variables 3. Modify dictionary Sometimes, the test case needs to call some functions that depend on the global configuration, or these functions themselves call some code that is not easy to test (for example, network access ...

The strategy pattern is the behavior pattern in JavaScript Design pattern. Definition: Define a series of algorithms, encapsulate them into strategy classes (Methods), and then separate the invariant part and the changing part, and these algorithms can replace each other Vernacular explanation: In fact, the so-called policy pattern is ...

I. constructor (more to use in the future) The function of the constructor constructor is to execute the code in the constructor constructor first whenever the new class is used. Traditional constructor: function Animal (name, age) { //Instance attribute this.name = name; this.age = age; } const a1 = new Anima ...

The existing Person classes are as follows class Person: name = 'Xiao Bai' def hobby(self): print('coding') __Use of dict Function: view properties in objects and view properties and methods in classes per = Person() print(per.__dict__) print(Person.__dict__) The results are as ...

2. Introduction to Alibaba's FastJson package. The Fastjson API entry class is com.alibaba.fastjson.JSON. Common serialization operations can be directly completed in static methods on JSON classes. SerializeWriter: equivalent to StringBuffer JSONArray: equivalent to List JSONObject: equivalent to map ...