Programmer Group

1. Reflection: (introspection) Reflection mainly refers to the ability of a program to access, detect and modify its own state or behavior (introspection). Reflection in Python Object Oriented: Operating the properties of an object in the form of strings. Everything in Python is an object (reflection can be used) <1> getattr () acquisitio ...

1. Factory mode Advantages: The ability to create objects in batches. Disadvantage: The method above is added for each object. function createCat(name, age, color) { var cat = new Object(); cat.name = name; cat.age = age; cat.color = color; c ...

When we create Java bean objects, we usually override the toString object method. Why? 1. The toString method is one of the methods in the Object class, which is used to return the string of the object. Two. Why rewrite the toString method? 3. Code demonstration // Create a Person class objec ...

_To go deep into the authentication (authentication) and access-control workflow of spring security, it must be clear that the main technical points of spring security include how key interfaces, classes and abstract classes work together to implement authentication and access-control. 1.spring security authentication and authorization process ...

import axios from '@/libs/api.request' const MODULE_URL = '/log'; export const actionLogData = (params, cb) => { axios.request({ url: `${MODULE_URL}/actionLog`,//Interface location method: 'get', params }).then(cb); };   Page Paging Problem. <Page class="table-page clearfix" :total="paging.total" :page ...

A few days ago, I helped a friend to build a website. All the websites were static pages. The only thing that needed to be developed in the back end was that he needed a message board. The traditional message boards are usually saved after submission to the database, and then provide a backstage message list for managers to see. I find it troub ...

JS-Native Animation Packaging Realization effect Code Realization effect In offset section, uniform animation and slow animation are realized, but only one attribute can be set at a time, and the animation can not be executed sequentially, so we need to solve the problem: Pass an array of styl ...

E-commerce magnifier I. Some Piecemeal Knowledge Points 1.style can only get in-line styles, but can be modified window.getComputedStyle can get all the styles in the browser, but it can't be modified. 2. If you use child elements, you must add children [] Eg: middle. children [0]. src attribute o ...

Window Features: Get other BOM objects, location, history, document objects Method Popup Alert (content); warning box confirm(); confirmation prompt box, used to make a prompt when the user exits or deletes the operation If the user clicks OK, return true If the user clicks Cancel, return false ...

python Enumeration Module Learning ps: Xiaobian has just started to study for a short time. Some resources come from other netizens. If there are any mistakes, please contact and modify Kazakhstan, help each other and make progress together. Enumeration and Dictionary Types Disadvantages of dictionary type: 1. Variable value 2. No function t ...