Prototype usage of JavaScript prototype
JavaScript object prototype
All JavaScript objects inherit properties and methods from the prototype.
<!DOCTYPE html>
<html>
<meta charset="utf-8">
<title>js</title>
<body>
<h2>JavaScript object</h2>
<p id="demo"></p>
<script>
function Person(first, last, age, eye) {
...
Posted by Whyme on Wed, 23 Oct 2019 10:26:03 -0700
Thermal planet software development program
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 ...
Posted by behrk2 on Fri, 18 Oct 2019 12:43:06 -0700
SpringBoot take-off series - internationalization
I. Preface
We may not use internationalization very often, but we still have to do it where we need it. Today, let's look at how to configure internationalization in our web development, so that our websites can display different forms according to the language. This article continues with the previous one. SpringBoot Take-off Series - Web Dev ...
Posted by michelledebeer on Thu, 10 Oct 2019 05:46:14 -0700
Tuple Data Types of Python Full Stack Road Series
The only difference between tuples and lists is that lists can be changed, tuples can't be changed, and other functions are the same as lists.
Two ways to create tuples
First kind
ages = (11, 22, 33, 44, 55)
Second kinds
ages = tuple((11, 22, 33, 44, 55))
If there is only one element in the meta-ances ...
Posted by canobi on Thu, 03 Oct 2019 13:47:13 -0700
Python Rapid Development of Scrapy, a Distributed Search Engine - Configuration of Scrapy Startup Files - xpath Expressions
We customize a main.py as the startup file
main.py
#!/usr/bin/env python
# -*- coding:utf8 -*-
from scrapy.cmdline import execute #Import and execute scrapy command method
import sys
import os
sys.path.append(os.path.join(os.getcwd())) #Add a new path to the Python interpreter, and add the directory of the main.py file to the Python interpr ...
Posted by double on Tue, 01 Oct 2019 13:15:07 -0700
Use Python to capture all the movies of Mouton Video, and you can watch VIP movies without money!
Crawler for all movie crawlers implemented by python
# -*- coding: utf-8 -*-
import re
import urllib2
from bs4 import BeautifulSoup
import string, time
import pymongo
NUM = 0 #Global variables, number of movies
m_type = u'' #Global variables, movie types
m_site = u'qq' #Global Va ...
Posted by eRott on Tue, 01 Oct 2019 02:45:40 -0700
Ali P7 Architect Shares: 15 minutes to quickly master Spring Cache
There are many caching strategies, which can be selected according to the situation in the application system. Usually, some static data with low frequency of change are put into the cache, such as configuration parameters, dictionary tables, etc. Some scenarios may need to find alternatives, for example, to improve the speed of full-text retr ...
Posted by PRSBOY on Tue, 17 Sep 2019 06:16:39 -0700
web Crawler Explanation - Scrapy Framework Crawler - Scrapy crawls Baidu News, crawls Ajax dynamically generated information
crapy crawls Baidu News, crawls Ajax dynamically generated information, and grabs the news rul address of Baidu News Home Page
There are many websites, when you visit the browser, the information you see can not be found in the html source file. If you scroll the information or scroll bar to the corresponding location before displaying the inf ...
Posted by listenmirndt on Mon, 02 Sep 2019 07:23:48 -0700
The Black Magic of Class and Metaclass in Python
Enumeration types can be considered as labels or sets of constants, usually used to represent certain finite sets, such as weeks, months, states, etc.
There is no specific enumeration type in Python's Built-in types, but we can implement it in many w ...
Posted by busyguy78 on Fri, 23 Aug 2019 04:31:50 -0700
Three Frameworks of Web Front-end _angular.js 6.0
Click to read angular (1)Click to read angular (2)Check out nicknames and get a full set of angular video tutorials
I. Angular 6.01.1 Custom Directives1.1.1 icktBindBinding this data to an element, similar to interpolation syntax
1 // Introducing services
2 import { Directive, ElementRef } from '@angular/core';
3
4 @Directive({
5 selecto ...
Posted by RGBlackmore on Thu, 01 Aug 2019 01:22:37 -0700