set method for learning ES6 grammar proxy

introduce The set method is used to intercept the assignment of an attribute and can accept four parameters. Target object, attribute name, attribute value and Proxy instance itself, the last parameter is optional demo1 assumes that the Person object has an age attribute, which should be an integer no ...

Posted on Sat, 05 Oct 2019 13:15:51 -0700 by AustinP

The TreeList of DevExpress in Winforn displays all directories and files under a certain path (with source downloads)

scene Introduction to TreeList of DevExpress in Winform (with source download): https://blog.csdn.net/BADAO_LIUMANG_QIZHI/article/details/100075677 https://www.cnblogs.com/badaoliumangqizhi/p/11412053.html On the basis of the above implementation of assigning value to TreeList, change its data so ...

Posted on Sat, 05 Oct 2019 11:58:45 -0700 by ChrisLeah

Shiro_Project_Purchase Order

Article directory Model Analysis of Purchasing Order 2 Code Implementation 2.1 Party (main table) 2.2 Multidimensional (from table) 2.3 Purchasebill date processing 3 Order Query List 3.1 purchasebill.jsp 3.2 purchasebill.js 3.3 Addition of Query Conditions 4 Add Modification Pop-up Dialog Box 4 ...

Posted on Sat, 05 Oct 2019 06:22:13 -0700 by spighita

37 Reptiles - Four Species of Beautiful Soup4 Objects

Beautiful Soup converts complex HTML documents into a complex tree structure. Each node is a Python object. All objects can be summarized into four types: Tag NavigableString BeautifulSoup Comment 1. Tag Tag is popularly referred to as a tag in HTML, such as: <head><title>The Dormouse's ...

Posted on Sat, 05 Oct 2019 04:19:46 -0700 by bluestar

vue uses the Notification custom button in element-ui to implement the shutdown function and how to handle multiple notifications

Using Notification in element-ui, there is only one message attribute that has a lot of operation space, and the rest are written to death, which can not be extended to achieve the desired effect. So we can only work on message. In the official element-ui document, you can see that the message attribute in Notification can handle VNode, so we ...

Posted on Fri, 04 Oct 2019 21:20:38 -0700 by izzy

Attributes like Python 3 and instance attributes

1. Class attributes and instance attributes Class attributes are equivalent to global variables, the attributes shared by instance objects, and the attributes of instance objects are private to the instance objects themselves. Class attributes are attributes owned by class objects (Tool s). They are shared by instance objects (instance method ...

Posted on Fri, 04 Oct 2019 19:25:27 -0700 by adnanhb

Flask Learning Tour--Making a Simple Verification Code System with Python+Flask

I. Write in front Now, large or small websites will basically use the verification code. When they are logged in, they should be verified. When they are downloaded, they must be verified, and the verification code will also evolve from those simple character verification codes to the verification code that needs to be recognized by pictures an ...

Posted on Fri, 04 Oct 2019 14:12:26 -0700 by Meltdown

Python: Selenium Chrome Bulletless Window + property/attribute/text

When we use Selenium to write automation programs, we don't want the program to play Chrome window all the time during the actual operation. At this time, we need to let Chrome open silently, read data automatically, and then close silently. The following is a method for chrome to open in a non-interfac ...

Posted on Fri, 04 Oct 2019 11:21:31 -0700 by spaggle

Preview and upload of native operation pictures of webform

1. Input tag is used for image manipulation. Input tag has an accept attribute, which can only be used in conjunction with <input type="file". It specifies the type of file that can be submitted through file upload. Multiple attribute values are separated by commas <input accept="audio/*, video/*, image/*">.   ...

Posted on Fri, 04 Oct 2019 08:33:53 -0700 by jonez

Encapsulation, Inheritance and Polymorphism in C Language

1. encapsulation Although there are no classes in C language, there are structs and pointers. We can simulate class behavior by storing data and function pointers in a struct. typedef struct _Parent { int a; int b; void (*print)(struct _Parent *This); }Parent; The significance of encapsulation is that functions and data are bound ...

Posted on Thu, 03 Oct 2019 20:01:00 -0700 by StoneJunkie