This article mainly introduces the use of React-router and webpack how to quickly build a react program, the following words not to say, interested can learn together.
Initializing a project
We first create an empty folder, then initialize the Package.json and fill in some basic information.
$ NPM Init
Next we start to install the dependencies, and my Package.json dependencies are as follows
# # #React简介RN is based on react design, understand react help us develop RN application;react wants to break down functionality and make development look like building blocks, fast and maintainablereact mainly has the following 3 characteristics:* As UI (Just the UI)* Virtual dom (Vsan)This is the highlight is the mos
React Native is a set of programming frameworks that use React to build Native appsReact Native at first sightwhat is React Native?According to the official description, React Native is a set of programming frameworks that use React to build Native apps. The launch soon spar
React-native Getting Started GuideGitHub:https://github.com/vczero/react-native-lession React-native: Develop your native app with JavaScript, unleash the Native UI experience and experience hybird development efficiency.The last one weeks of writing the article below, the link is GitHub page, in fact, you can also find the article in the series blog:
1t
Preface: As the name implies React-native-device-info this third party is to obtain equipment information.
In fact, React-native have many similar third parties and are used in much the same way as in this case. As an example record, for students who need to learn: 1, initialize the project:
Initialize a react-native project: command:
Win+r//Enter command line
C
This article mainly introduces how nodejs uses phantomjs to download webpages. For more information, see. The function is actually very simple. You can use phantomjs.exe to collect url-loaded resources and use sub-processes to start nodejs to load all resources. For css resources, match the css content, download the url Resource
Of course, the function is still very simple. In the case of responsive design and asynchronous loading, there are still a
1. Installing SeleniumPIP/PIP3 Install SeleniumPay attention to dependency relationships2.PHANTOMJS for Windows: http://phantomjs.org/download.htmlPhantomjs-2.1.1-windows only supports 64-bit systemsPhantomjs-1.9.7-windows supports 32-bit systems, earlier versions not testedCopy the Phantomjs.exe file from the downloaded installation package bin directory to the scripts directory under the Python installation directory3. Simulate browser operationImpo
Nodejs uses phantomjs to download the webpage. nodejsphantomjs
The function is actually very simple. You can use phantomjs.exe to collect url-loaded resources and use sub-processes to start nodejs to load all resources. For css resources, match the css content, download the url Resource
Of course, the function is still very simple. In the case of responsive design and asynchronous loading, there are still a lot of resources that cannot be downloaded a
()Installing PHANTOMJS
http://phantomjs.org/
Download installation
Add directory to path (copy exe to Python directory if problem is used)
Capture the entire Web page#-*-coding:utf-8-*- fromSeleniumImportWebdriver fromUrllibImportQuoteImportsysreload (SYS) sys.setdefaultencoding ('Utf-8') Driver=webdriver. PHANTOMJS (executable_path="C:\Python27\phantomjs.exe") URL=quote ("searchtype=
Phantomjs because it is a headless browser can run JS, so the same can run the DOM node, used to crawl the web is better.
For example, we want to bulk crawl Web page "Today in history" content. Website
The observation of the DOM structure shows that we only need to take the title value of the. List Li A. So we use the advanced selector to build the DOM fragment
var d= '
var c = document.queryselectorall ('. List li a ')
var l = c.length;
for
[React Native Development] React Native porting nandroid Project(1) Preface
In the first three courses, we have explained the React Native For Android environment setup, IDE installation configuration, application running, and debugging knowledge. Today we are talking about a very useful knowledge point. Transplant our existing Native Android project to
general, you will passstore.dispatch()upload the action to the store. This is an official explanation, and my personal understanding is that action is about defining an event, but not doing anything logically, just binding the data and events you need to work with, and then waiting for the store to distribute it, i.e. update the store. It's like defining a click event for a button;Btn.addeventlistener (Mouseevent.click,onclickhandle);This code actually does nothing, just tells the system what t
use Facebook's create-react-app scaffolding to quickly build a react development environment (Ant.design,redux ...). )
The "scaffolding" in the programming field refers to a kind of tool that can quickly build a "skeleton" of the project scaffolding. For example, most react projects have src,public,webpack profiles, and so on, and the SRC directory contains comp
EnvironmentOperating system: CentOS 6.7 32-bitPython version: 2.6.6Third-party pluginsSeleniumPhantomjsBeautifulSoupCode#-*-coding:utf-8-*-Importsysreload (SYS) sys.setdefaultencoding ('Utf-8')" "The stars last night" "ImportReImportOSImport TimeImportShutilImportRequestsImportsubprocess fromBs4ImportBeautifulSoup fromSeleniumImportWebdriver#Stitching URLdefJoint_url (String):return 'https:'+string#determine if the folder exists and delete it if it exists, or create it. defCreate_folder (path):i
,db):‘‘‘constructor function:p Aram Websearchurl: Search Page URL:p Aram pagecountlable: Search page Labels:p Aram Htmllable: tags to search for:p Aram Originalurllabel: The URL tag for each record:p Aram Nexturllabel: Next page tab:p Aram Keywords: keywords to search, separated by semicolons in the middle of multiple keywords (;):P Aram DB: Saving the Database engine‘‘‘Thread.__init__ (self)Self.websearchurl = WebsearchurlSelf.pagecountlable = pagecountlableSelf.htmllable = htmllableSelf.origin
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