django essentials

Catalogueone, Django URL Applicationsecond, Django View Applicationthird, Django Template ApplicationIv. Django's ORM ApplicationAdd:Supplement One: GetlisApplication Scenario: The current side of the data sent at multiple times, the background if you also get data with get, then there will be a problem, so there is a getlist method for data Acquisition.Test Case

[Django] user permission operation commands (1), django operation commands To create a py file for testing, add the following code to the file. # Coding: UTF-8 import OS. environ. setdefault ("DJANGO_SETTINGS_MODULE", "www. settings ") ''' when the Django version is greater than or equal to 1.7, add the following two statements: import djangodjango. setup () othe

In order to speed up the loading speed of the website, we usually need more JS and CSS for compression processing. These JS and CSS compression work if all manual processing, time-consuming and laborious. The Django compressor enables automatic compression of js/css. Django compressor is very good with ease of use, and the document is simple to set up to work properly. It is highly recommended that you rea

The main way I studied Django was http://djangobook.com, and the author's book appeared to have been published. The author's thinking is very refreshing, the explanation is easy to understand, the depth of the place in depth, I like, more than the official Django documents feel much better, the official document is too obscure. These essays are a combination of some examples of Django's Learning

Photoswipe is a dedicated image gallery for mobile devices that is inspired by IOS Image browser and Google mobile images. Photoswipe provides your visitors with a familiar and intuitive interface that enables them to interact with the images on your mobile site.Online Demo Source Download　Related articles that may be of interest to you The JQuery effect "attached source" is very useful in website development Share 35 amazing CSS3 animation effects Demo Stunning 8 x HTML5 JavaScript

TenSerializer.setoutput (FOS, "Utf-8"); One ASerializer.startdocument ("Utf-8",true); -Serializer.starttag (NULL, "SMSs"); - for(Smsinfo sms:list) { theSerializer.starttag (NULL, "SMS"); - -Serializer.starttag (NULL, "Address"); - Serializer.text (Sms.getaddress ()); +Serializer.endtag (NULL, "Address"); - +Serializer.starttag (NULL, "Date"); A Serializer.text (Sms.getdate ()); atSerializer.endtag (NULL, "Date"); -

Answer: Must worry about, ARC also not omnipotent.This is mainly related to the data type of the collection class.For example, we define a mutable array muarr1, and then add an object P1 to the MUARR1, and this object retain once, equivalent to retaincount+1, only when the array removeobject:p1 delete the object, Or the array itself Muarr1=nil, or the array removeallobjects, it will release the object or all of its objects once.iOS Dev 35 has an arc memory management mechanism, do you still need

with a variety of popular social media platforms, where developers can integrate this component into their mobile apps, allowing users to easily share the content of their apps in the most popular social media platforms. Mobile Development Payment Platform Class solutions: for developers to provide payment platform API interface, to achieve the functions such as remittance transfer. Mobile Development Voice class solutions: for mobile developers to provide convenient speech recognition ser

Answer: You have to worry, arc is not omnipotent.This is mainly related to the data type of the collection class.For example, an array, we define a mutable array muarr1, and then add an object P1 to Muarr1, this object retain once, the equivalent of retaincount+1, only when the array removeobject:p1 Delete this object, Or the array itself muarr1=nil, or if the array removeallobjects, it will release the object or all of its objects once.iOS Dev 35 has an arc memory management mechanism, do you n

1, Python's int type has no size limit (or only by machine memory limit), str type with single or double quotation marks, as long as the symmetry is OK. (attention to fixation)2. Use [] to denote an entry of a sequence such as an access string (index starting at 0)3. Type conversion4, the dynamic type mechanism, the variable can be any type, can switch freely.5.6. Identity operator7. Comparison operators8. Member Operators9. Logical operators10. Control Flow StatementsPass is empty statement, go

Chip ShaderInput: Result of interpolation of vertex information in previous stage (vertex shader)Output: One or more color valuesRendering Techniques: Texture sampling2.3.8 per-slice operation1. Determine the visibility of each slice, for example, depth test, template test2. Mix the slice color value from the test with the color in the buffer3. Mixed, opaque objects directly overwrite the pixel values of the original buffer, and transparent objects are blended with the original buffer pixel val

1, the content of the user review should use the Htmlspecialchars () function to filter, such as Htmlspecialchars ($_post[' content '), and then write to the database, to prevent user comments containing JS and HTML code, etc.2, about deleting the article, need to delete the picture of the idea: see Brother even PHP project video 24 speak 44 minutes or so3, about the design of the data table:3.1, two related tables, when the relationship is1 to 1 o'clock, you need to build one word in either of

In iOS programming, we often talk about proxy agents, which is delegate, so what is a proxy?Let's take a look at Cocoa's description of it:Delegation is Cocoa's term for passing off some responsibilities of a object to anotherName implies:An agent is the transfer of responsibility from one object to another.In fact, if you have written a Java or C # program friends should know that we are in the design of the use of the interface and combination, the same truth.Take a look at the following code:

;@InjectView(R.ID.TEXTVIEW2) TextView textView2;@InjectView(r.id.imageview1) ImageView imageView1;@InjectResource(R.string.app_name) String name;@InjectResource(R.drawable.ic_launcher) Drawable Iclauncher;@InjectLocationmanager Locmanager;@InjectLayoutinflater Inflater;@InjectNotificationmanager Notifymanager;@Override protected void onCreate(Bundle savedinstancestate) {Super. OnCreate (Savedinstancestate); Setcontentview (r.layout.layout_test); Textview1.settext (name); }}Benefits

instance, the parent class reference is polymorphic when the method is called, because the child class overrides the method of the parent class.Conditions: 1. Must inherit 2. Subclasses must override the parent class Method 3. Parent class reference to child class instanceStaticKeywords: staticAn ordinary member belongs to an object.A static member is a class-ownedStatic members can be called in normal methodsStatic methods cannot invoke ordinary membersCalled with the class name: Ren::say ();S

parameter 2 passes to the function's argumentsfunction Saynameforalla (label) {console.log (label+":"+ This. Name)} varPERSON1A ={name:"ZS1" } varPERSON2A ={name:"LS2" } varName ="CCC"Saynameforalla.call ( This,"name") Saynameforalla.call (person1a,"person1a")Apply ()Saynameforalla.apply (This, ["namea"]) Saynameforalla.call (person1a,[ "person1a"])Determines whether an object contains attribute in (including prototype properties)Console.log ("name" in person2a); //

,+) (string is a decimal integer, converted toconvert integers to Strings: String s=string.valueof (i); String s=integer.tostring (i);the character is converted to an integer:str.charat (i)-' 0 '; or Str.charat (i)-;character to integer:int num = integer.valueof (ch[i]);type cast: int n= (int) num; ( Num to be Double type of)Convert string to character array:char ch[]=str.tochararray ();intercept string:str.substring (0,8): intercepts a substring of position 0 to position 7Str.substring (8): in

times times slower than parsing a static HTML page. Use static HTML pages as much as possible and use fewer scripts. 27. Unless the script can be cached, it will be recompiled every time it is called. Introducing a set of PHP caching mechanisms can typically improve performance by 25% to 100% to eliminate compilation overhead. 28, try to do the cache, you can use memcached. The memcached is a high-performance memory object caching system that can be used to accelerate dynamic Web applications a

character, rather than write a line of code to accept the array as the query and replace parameters.13. Use the Select Branch statement (that is, switch case) better than using multiple if,else if statements.14. Masking error messages with @ is extremely inefficient and extremely inefficient.15, open the Apache mod_deflate module, can improve the browsing speed of the page.16, the database connection should be turned off when used, do not use long connection.17. Error messages are costly.18, in

Apache mod_deflate module, can improve the browsing speed of the page.16, the database connection should be turned off when used, do not use long connection.17. Error messages are costly.18, increment the local variable in the method, the speed is the quickest. is almost equivalent to the speed at which local variables are called in the function.19, incrementing a global variable is twice times slower than incrementing a local variable.20, incrementing an object property (such as: $this->prop++