treehouse full stack

Path to full-stack JavaScript (19th) html 5 insertion of html tags (1) innerHTML and outerHTML, html5outerhtml It is difficult to use DOM operations to insert a large number of html tags to a document. You must not only create a series of nodes, but also carefully link them in order. Using the html tag insertion technology, you can directly insert html code strings, which is simple and efficient! The foll

Full-stack JavaScript path (15th) HTML5 focus extension (focus extension), html5 HTML5 adds the focus management function. The focus of documents can be obtained through page loading, user input (usually by pressing the tab key), and the focus () function is called in the code. The attributes and methods of the auxiliary management focus added by HTML5 include: Document. activeElement attribute. This attri

Full-stack JavaScript path (13) Understanding of ElementTraversal specifications Browsers supporting Element Traversal specifications include IE 9 +, Firefox 3.5 +, Safari 4 +, Chrome and Opera 10 +. For spaces between elements, no document node is returned before IE9, and all other browsers will return the document node. In order to be compatible with the differences in browsers without changing the e

Full stack workshop training 13 --- Android --- message bus Mechanism The blog post published yesterday tells about the content of network requests using asynchronous tasks in Android. At the end of the asynchronous task, Handler mechanism is used to notify the original Activity to update the interface. The netizen traburiss pointed out that, the onPostExecute of the asynchronous task is already in the UI t

Python full stack Development 5. Several Common sorting algorithms and the data structure provided by the collections module, pythoncollections During the interview, I often encounter some questions about the sorting algorithm. Here, I simply listed several of the most common sorting algorithms for you to learn. Maybe the interview will be useful in the future, the second half of this article introduces the

Python thread pool and process pooling for concurrent application# thread pool requires imported module from Concurrent.futures Import threadpoolexecutor# process pool requires imported module from Concurrent.futures Import Processpoolexecutorimport time# test Function def task (ARG): print (ARG) time.sleep (1) # Instantiates a thread pool object with a maximum concurrency of 10pool= Threadpoolexecutor #pool. The submit parameter is a function and the parameter is passed for I in range:

not include HTML element tags, the result is to set plain text, such as:div.innerhtml = "Hello";Suppose the string includes HTML tags, such asdiv.innerhtml = "Hello Welcome, The results of the above write mode operations are as follows:After the innerHTML has been set. You can access the newly created node as you would any other node in the document.After you set the HTML string for innerHTML, the browser parses the string into the corresponding DOM tree. Therefore, after setting the innerHTML

:: return: "" With Open ("Db.log", "R", encoding= "Utf-8") as F:for line in f:line = Line.strip () l Ine_list = Line.split ("$") if line_list[0] = = Username:return True return falsedef main (): print (" Welcome login XXX System ") INP = Input ("1: Login; 2: Register") If InP = = "1": User = input ("Please enter User:") pwd = input ("Please enter password:") Is_login = Lo Gin (user, PWD) if Is_login:print ("Login Successful") Else:print ("Login Failed") elif INP = = "2": user = input ("Pl

/zh605929205/articles/7103825.html2, models operation:Http://www.cnblogs.com/zh605929205/articles/7103831.htmlSeven, the template:Http://www.cnblogs.com/zh605929205/articles/7103790.htmlEight, pagination:Http://www.cnblogs.com/zh605929205/articles/7103887.htmlIx. Django's XSS and CSRF mechanism:Http://www.cnblogs.com/zh605929205/articles/7103796.htmlTen, Django session:Http://www.cnblogs.com/zh605929205/articles/7103775.htmlXI. Middleware:Reference Address:Http://www.cnblogs.com/wupeiqi/articles

Basic elements of the interview:1. BasicFunction-Type programmingObject orientedBYTE, binary, and conversionHTTP request Flow2. Database designClassic (blog, press release system)3. Algorithms[11, 22, 33, 44, 55, 66, 12312312]Sort, maximum, second maximumThe most basic is the bubbling sort.4. Intelligence TestBubbling algorithm1. Two value swaps:1 #!/usr/bin/env python2 #-*-coding:utf-8-*-3A1 = 1234A2 = 3455 Print("a1=%d\t a2 =%d"%(A1,A2))6TMP =A17A1 =A28A2 =tmp9 Ten Print("a1=%d\t a2 =%d"% (A1,

I in range (+): # pool.apply (Foo, (i)) apply the application at the time of one application and execute the pool.apply_ Async (Func=foo, args= (i)) # Concurrent, can also set callback function print (' 666666666666 ') pool.close () pool.join ()　　Low version thread pool : The disadvantage is that after a thread executes a task, it cannot be reused and waits for Python to destroy itImport Queueimport threadingimport timeclass ThreadPool (object): def __init__ (

": None} try:cid = Request. Post.get ("cid") CNAME = Request. Post.get ("CNAME") sql = "Update class set cname =%s WHERE cid =%s" Sqlmodus.put (Sql,[cname,cid,])Except Exception as e:ret["status"] = falseret["message"] = "Handling Exception" return HttpResponse ((ret))//using JSON to convert objects to String return templateModal and new URLs application scenario analysis:Modal dialog box (Ajax) for:-Few input boxes-less Data example: LoginNew URL mode-operation multi-for a large number of data

: Shared directory destination Directory2. Scheduled TasksCrond services are divided into system scheduled tasks and user scheduled tasks.System-Level Scheduled tasks: Modify the configuration file/etc/crontab file to create a scheduled task.User-level Scheduled tasks: Normal users edit their own scheduled tasks directly using the CRONTAB-E command. The root administrator can use crontab-e-u [user name] To modify a user's scheduled tasks. All user-defined crontab files are saved in the/var/spool

): Print (key, value) def __delitem__ (self, Key): print (' simulated delete succeeded!! ') obj = Foo () print (obj.__dict__) # View the object encapsulated field ' ' {' name ': ' Alex ', ' gender ': ' Female '} ' Print (foo.__dict__) # View the members of the class ' ' {' __module__ ': ' __main__ ', ' __doc__ ': ' \ n I am the comment of the class \ n ', ' __init__ ': 　　 6.4 Similar to string, list, why can we use for loop this object? 　　　　In fact: The __iter__ method in the default execution

1.rpmRPM: Used to install the local RPM package.-QA: Querying all Packages installed by the system-IVH: Installing Packages-QI: Querying Package information-QL: Querying files in a package-QF: View a file that was generated by the RPM package-E: Unload RPM Package2. YumYum install [package name]: Install packageYum Remove [package name]: Remove PackageYum Search [package name]: Query PackageYum Makecache: Creating a Yum Source cacheYum repolist: View Source listYum Groupinstall [Package group na

, which is the bytecode generated after the Python interpreter was compiled.PS: Code is compiled to generate bytecode, and bytecode can be obtained by decompile.3.3 VariablesConsists of letters, numbers, and _, which cannot begin with a number, and cannot be used as a variable name.Python-defined variables do not require a declaration type, variables that are not declared cannot be referenced directly4. Input and outputPython2 input has raw_input (), parse all input into a string, enter a string

(' Webpack-dev-middleware '), Webpackhotmiddleware= Require (' Webpack-hot-middleware '); varcompiler =webpack (config);Config.entry.unshift ("webpack-hot-middleware/client?reload=true?http://127.0.0.1:7777/"); Add this to the portal of the Webpack configuration file? reload=true Set whether the browser refreshes automatically;App.use (webpackdevmiddleware (compiler, {noinfo:true, PublicPath:config.output.publicPath})) App.use (webpackhotmiddleware (compiler)) App.listen (7777);Webpack.config.j

, tm_min=0 , Tm_sec=0, Tm_wday=3, tm_yday=28, tm_isdst=-1) ' Import Datetimeprint (Datetime.date.today ()) ' 2017-05-23 ' ' Print ( Datetime.date.fromtimestamp (Time.time () -664000000)) "1996-05-08" current_time = Datetime.datetime.now () print ( Current_time) ' 2017-05-23 19:38:20.001431 ' Print (Current_time.timetuple ()) # Returns the time Object format ' Time.struct_time (tm_ year=2017, tm_mon=5, tm_mday=23, tm_hour=19, tm_min=38, tm_sec=20, Tm_wday=1, tm_yday=143, Tm_isdst=-1) ' Print ( Cu

property). This includes all computed styles for the current element.(There is no getComputedStyle () method in IE, but in IE, each element with a style attribute has a Currentstyle attribute, which is an instance of the Cssstyledeclaration type)The border property may or may not return the actual border rule in the style sheet (Opera will return but not other browsers).The reason for this area is that different browsers interpret synthetic (rollup) attributes, such as border, in different ways

function call 'ret = func (*args,**kwargs)"' Add extension code after function call 'return retreturn innerOpen and closed principle of #设计模式 principle#对扩展是开放的#对修改是封闭的6, adorner decoration two functions1 defWrapper (func):#Decoration2 defInner (*args,**Kwargs):3 4ret = func (*args,**Kwargs)5 6 returnret7 returnInner8 9@wrapper#AAA = wrapper (AAA)Ten defaaa (): One Print('ASGHKSDLHF') A -@wrapper#BBB = wrapper (BBB) - defBBB (): the Print('ASGHKSDLHF') - - - aaa () + B