django essentials

1:2.x and 3.x differences:2.x: Old class, all inherit from object, inheritance mechanism is depth first3.x: New class does not need to write (object), the inheritance mechanism is breadth first2: Class Description:Under Define class, use "" "" "" "" "" PackageView method: Classname.__doc__ or Help (classname)3:classname () is instantiated and is typically assigned to a variable4: Instantiation Process:1): __new__ () method to establish an instance2): __init__ () method Initialize instance* The c

mouse slide over the picture, you can display the picture text description. More important, this HTML5 image text description provides a variety of animation effects, when you slide the mouse over the picture will have a variety of text description effect.Online DemoSOURCE download8. CSS3 Gesture Transform animation effectThis CSS3 animation is very special, it shows in front of us is a palm, the palm has a sliding button, click the button to toggle gestures, can now switch two different gestur

+$/, "")}// TRIM2function() { returnthis. replace (/^\s+|\s+$/, "") }In fact, trim2 is slower than trim1, because TRIM1 simply retrieves the original string once and retrieves the string that removes the whitespace from the head again. and trim2 needs to retrieve the original string two times.It is also necessary to disassemble the usual complex regular expressions with many conditional branches, which are mainly due to the backtracking problems caused by conditional branching.Of course, if th

... ..... .... ... ..... ..... ..... ..... ..... ..... ....... ................ 10Project Options ...... ..... ...................... ............................. 10Build configurations ... .... ... ..... ... ..... ... ..... ..... ..... ..... ..... ..... ..... ..... ..... ..... .......... 11Warnings as Errors ... ..... ... .... ... .... .... ..... ..... ..... ..... ..... ..... ..... ..... ..... ............. 11Resource Compiler ... ..... ... ... .... ... .... ..... ..... ..... .... ...........

DefWindowProc function as the topmost function. This function emits a wm_syscommand message that is used by the system to perform various common operations that are common to most windows in the window environment, such as updating the body title of the window, and so on. Under MFC, you can use some of the following code to implement the same functionality as the SDK code above:Begin_message_map (Ctemmsview, CFormView){{Afx_msg_map (Ctemmsview)On_wm_lbuttondown ()On_wm_timer ()}} Afx_msg_mapEnd

your program's priority is reduced and may be withdrawn by the system. The data that is stored here should be inRead it in the Onresume, note: This method takes a short time, because the next activity does not wait until this method is completed to startOnStop: becomes invisible and is covered by the next activityOnDestroy: This is the last method that was called before the activity was killed, perhaps the outer class called the Finish method or the system to save space to temporarilyThe time o

Developer Essentials App (download once for life)This application provides a collection of third-party libraries, as a development of this application is essential for you.You will have information about the author, capture, license, and link to the library that you can try to work in the application sample.Recently also added a tab with fragments that will keep updating.The version of the application in order to collect the maximum possible number of

Apachesamza) in the case of complexity, develop a new ML algorithm. The user can develop a distributed stream ml algorithm and can execute on multiple dspes. Neuroph -. Neuroph simplifies neural network development by providing Java network libraries and GUI tools that support the creation, training, and preservation of neural networks. Oryx2 -. Oryx2 is a lambda architecture built on Apachespark and Apachekafka, but gradually began to specialize with real-time, large-scale machine learning. Th

= name;}varnew Person("ligang");var p2 = Person("camile"instanceof// trueinstanceof// falseA scope-safe constructor is a constructor that can be called to generate a new object instance without using new. Its this will already point to the instance of the custom type at the beginning of the constructor execution. Of course, you can determine the behavior of the constructor based on whether or not new is used.function Person(name){ if(thisinstanceof Person){ this.name = name; }else

Summarize a few key questions and simply list them.1.kvc,kvo differencesKVC key valued coding key value encodingKVC relative to the time kvo, that is, key valued observer key value observation. Listen to the properties of a model, as long as the value of the model property changes to notify youHttp://www.cnblogs.com/wendingding/p/3751279.html2.runloopThread looping, http://www.dreamingwish.com/frontui/article/default/ios-multithread-program-runloop-the.htmlRunloop UnderstandingNsrunloop Overview

removed.SOURCE Download:Android Boutique: Side menu.android Source parsing6. High- Quality Android Project source code Android-pulltorefreshA powerful pull refresh open source project that supports various controls drop-down refreshes, ListView, Viewpager, WebView, Expandablelistview, GridView, ScrollView, Horizontal ScrollView, fragment up and down around to pull the refresh, than the following Johannilsson that only support the powerful more than the ListView. And it implements a pull-refres

,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, 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

First, the head settingModel:Second, dialing, SMS, mailHTML5 "Grammar Essentials"

Introduction:JQuery Mobile is the front-end development framework for creating mobile Web apps.JQuery Mobile can be used on smartphones and tablets.JQuery Mobile uses HTML5 CSS3 to layout Web pages with minimal script. jQuery Installation: Load JQuery Mobile from CDN ?? The full name of the CDN is the Content Delivery network, which is the contents distribution networks. The basic idea is to avoid the bottleneck and link of the Internet which may affect the speed and

Although volley has provided for the parsing of string, picture, json,request, but there is always some data does not belong to the above three kinds of, this time we need to implement a request to resolve the data we need.Implementing a custom request is simple:1. Inheritance request2. Implement the Parsenetworkresponse() and Deliverresponse() methods.Parsenetworkresponse@Overrideprotected responseParsenetworkresponse () parameter networkresponse, this parameter contains the HTTP status code, r

interfaces for an object so that it can communicate related events to other objects.Define the interfaces that the delegate object should support as protocols, and define the events that may need to be handled as methods in the protocol.When an object needs to be from another object or data, the delegate mode can be used, which can be referred to as the "Data Source Protocol (protocol)" in this mode.If necessary, a struct containing a bit segment can be implemented to cache the information that

addition, polymer provides an example of a series of components, including weather, clocks, stock quotes, and line charts.The Polyfills in polymer provides a variety of web technologies for building applications that need to use Web Components successfully, including:HTML imports: The method of introducing and reusing HTML document in other HTML document.Custom elements: Let developers define and use custom DOM elements.Shadow DOM: The encapsulation provided in the DOM.Model Driven Views: Provi

, let's look at the use of closure code to be more conciseImport Cocoa // use closure var counts = [16229 - = counts.sort ({ in return i j})Swift's closure syntax:{(parameters), [return type] inCode}The closure is made more concise by type inference (inference):= [1622930 in i Make your code more concise with parameter placeholders:= [16229 Counts.sort ({$0 1 })It is not difficult to judge that the code above represents the first parameter, which is I, and that the first parameter

. Navigation tests. When you run the app, the navigation is intuitive, accurate, and the page is switched correctly, regardless of the contact. Picture Test. Picture, whether the button is self-adapting. Content testing. To make extra-long characters, check for null characters and check for typos Functional testing. Whether the feature is implemented. Ease of use testing. The development of the function, whether the user is easy to accept, whether it is in line with the publi

CSS3 has 3 types of animation-related properties: Transform, transition, animation.Different points:1. Trigger conditions are different. Transition is usually used in conjunction with events such as hover and is triggered by events. The animation is similar to the GIF animated diagram and plays immediately.2. Cycle. Animation can set the number of cycles.3. Accuracy. Animation can set the style and time of each frame. Tranistion can only be set to the tail. In animation, you can set style proper