React summary (2) - communication between components

1. Parent component communicates with child component: The parent component passes props to the child component, and the child component gets props and processes it accordingly. Container.js ..... import Sub from 'Sub.js'; class Container extends React.Component{ constructor(){ super(); } render ...

Posted on Fri, 24 Apr 2020 10:13:28 -0700 by EddieFoyJr

Best practice of interactive class library of remote control on lightweight TV terminal

1, Introduction Hello everyone, what I'm sharing today is the implementation of an interactive class library of TV remote control. From the end of April to the middle of July last year, tal developed our first intelligent hardware, the future treasure box. The future treasure box is similar to millet box, with cartoon shape, which can be easily ...

Posted on Fri, 24 Apr 2020 03:07:32 -0700 by nailzfan

Custom groovy scripts generate PO entity classes for databases in IDEA

Complete code implementation at the bottom of the article Preface We may encounter the following problems: A small project of the company has been split into two services, API and Background Management, but since they share a database, there are many identical database entity definitions. Therefore, we have to provide the same entity definiti ...

Posted on Wed, 22 Apr 2020 20:04:52 -0700 by harkly

Android adds shadow effect to layout and control

There are two solutions to increase the shadow effect and make the control or layout look three-dimensional. 1. Directly use the code of attribute: android:elevation="4dp" to achieve the effect. Elevation represents the altitude, which is the height of z axis of the layout. Adjust the height, and you can choose the weight of the sha ...

Posted on Mon, 20 Apr 2020 09:40:01 -0700 by eddy666

Three relationships in Python classes (dependency / composition / inheritance)

In object-oriented, there are three relationships between classes: dependency, composition, and inheritance. 1. Dependency: The relationship used to pass the class name or object of one class as a parameter to another function is dependency class People: def __init__(self,name): self.name = name def open(self,bx): bx.op ...

Posted on Mon, 20 Apr 2020 09:37:59 -0700 by bUcKl3

Request parameters in spring

Request parameters in spring Creation: April 20, 2020 Environment: spring boot 2.2.6.release Revised: April 20, 2020 @The RequestMapping annotation can receive string arrays. The class level functions on all methods. The access path of methods is the combination of class level and method level. The access paths of the following a methods are ...

Posted on Mon, 20 Apr 2020 09:29:49 -0700 by sk8erh4x0r

The use of asp.net core mvc ViewModel view model object

If the page needs to display multiple types of information, the movie class of poco cannot complete such information. At this point, you need to define a viewmodel object to use the data model. The viewmodel contains relatively complex data structures, such as a list and a class collection.ViewModel represents a concept, not a specific class. ...

Posted on Mon, 20 Apr 2020 08:12:31 -0700 by bdee1

The use of java generic T

1. Design background: there are three modules: common, web and mgr. Cmmon is the common module, web is the component of app, and mgr is the back management. The common module initiates the call interface call, but the common module cannot introduce the bean of web module. In order to use object-oriented programming, the bean of the web componen ...

Posted on Mon, 20 Apr 2020 07:03:30 -0700 by jplavoie

Vue.js calculation properties + listening properties

Vue.js calculation properties Calculation attribute keyword: calculated. Computational properties are useful when dealing with complex logic. You can see the following example of reversing a string: <template> <div id="app"> <p>{{info}}</p> <p>{{reverse}}</p> </div> </template> < ...

Posted on Mon, 20 Apr 2020 02:20:25 -0700 by ShootingBlanks

Tkinter Graphical Interface Design (GUI)

[Because this was the first GUI GUI python library I touched, and it's no longer used, most of the content comes from previous blossoms Money for some quick start content that can be used as a simple knowledge point query) Statement here: Content from WeChat public number GitChat, paid content Catalog brief introduction Window Creation and ...

Posted on Sun, 19 Apr 2020 18:54:11 -0700 by jackliu97