us that the Flow object helps us switch to this screen. In addition, as we have expected, Flow is instantiated to implement the GoBack () and Goup () methods. However, many developers think of the Goto statement in Java as a scourge, but in fact the Goto statement in Java does not sound as scary as it sounds.In essence, Flow simply tells us which screen we're going to switch to in the APP. The advantage of this design is that Flow is designed so that we can easily switch between the various cus
The Analects of Confucius Zi Lu said: "The name is not regular words, but not words. "
Although the term enterprise architecture (EA) originated in the West, its English expression is not so accurate. For example, the "What's XXX" we are used to has two different translation methods. One is "What is XXX", which reflects the definition of connotation; the other is "What is XXX", which reflects the description of extension. As the cloud in Mozi Sutra: "That's why the name is also true. The so-ca
the design of the Web page reduces the introduction of code, improve page loading efficiency.4. BluetripBluetrip is a well-done part integrating the Blueprint Tripoli Framework, Hartija print style, 960.gs simplicity, and a CSS framework for the Elements icon. Provides you with a handy collection of styles and a common way to make websites. So you can focus on the design.5. Elastic CSSElastic is a simple CSS framework used to lay out web pages. Elas
(Gameobject) on the main menu to apply the changes to the preset (apply changes to Prefab), which saves you a lot of time setting up and updating resources.If the game object (Gameobject) contains multiple components (Component) and a sub-game object (Gameobject) level, you can create a preset (Prefab) in the top-level game object (Gameobject) (root). Then use the entire collection of Game objects (Gameobject).You can use Presets (Prefab) as a blueprint
(GameObject) level, you can go to the top-level game object (GameObject) (or root )) create a preset and then use the entire game object set.
Prefab can be used as a game object structure blueprint. All the preset (Prefab) clones are the same as the blueprint. If the blueprint is updated, all clones will also be updated. There are multiple ways to update a prese
describes a series of objects with the same meanings in terms of concept, and defines the attributes and methods of programming languages for these objects.
Class is the definition of an object. It contains information about the object action method, including its name, method, attribute, and event. In fact, it is not an object because it does not exist in the memory. When the code of the referenced class is run, a new instance of the class, that is, an object, is created in the memory. Althoug
: 2014_10_12_000000_create_users_table
Check the mysql database again, and the migrations table is left. The users password_resets is deleted.
Modify the migration file and run the migration again.
New Migration
Copy codeThe Code is as follows:Php artisan make: migration create_article_table -- create = 'articles'# OutputCreated Migration: 2015_03_28_050138_create_article_table
Create a new file under database/migrations.
The id column is automatically added and automatically increases. timesta
To solve the Android device fragmentation, introduce a concept density, that is, density. It refers to the number of pixels displayed on a physical screen of a certain size, generally using the dpi (dots per inch, pixel of each inch) as a single
such as the device resolution of 240x320, screen physical size of 1.5 inches x2 inches (Diagonal 2.5) Its density can be expressed in resolution/size: 240/1.5 or 320/2, density 160dpi. It's the same as the diagonal.
, the square of long square + width
its use.
What's the problem? Recently, I (the original author) and some design students to communicate, they asked a lot about the wireframe prototype problem. Through these questions, I find that their mental model of the concept of wireframe is far from the essence--in their understanding, this concept includes many factors related to visual design. To make matters worse, they don't even want to do wireframe prototypes, they only know that this is one of the processes that needs to be done,
(current gear, two wheels, etc.) and behavior (change gears, brakes, etc.). However, the status of each bike is independent and different from other bicycles.
When manufacturers make bicycles, manufacturers use the common characteristics of bicycles to make many bicycles according to the same blueprint. If making a bicycle is going to produce a new blueprint, the efficiency is too low.
In object-oriented s
We sometimes need to build Linux on the basis of busybox, but do not know how to do, here will be based on BusyBox Linux small system production to make detailed steps to explain.
Preparation environment:
1, a Redhat full system of virtual machines, this time the example is using Redhat Enterprise Linux 5.8
2, on the main virtual machine to add a hard disk as a small system storage disk, which is added to the IDE hard disk,
3, the preparation of Linux kernel source code and BusyBox source co
; @ decorator... def func (x ):... print x... decorator being called # using the func () function actually uses the decorated_func function >>> func () 1 >>> func. _ name _ 'corated _ func' if you want to ensure that the name of the returned decorated_func function is the same as that of func, add decorated_func.name = func before the decorator function returns decorated_func. name. In addition, the functools module provides the wraps modifier to comp
before the Decorator function returns DECORATED_FUNC. In addition, the Functools module provides a wraps decorator to complete this action.
# @wraps (func) operation equals # before return decorated_func, execution #decorated_func.__name__ = Func.__name__#func passed in as an adorner parameter, #decorated_ Func is passed as a parameter of the function returned by wrap
the decorator.
Simple decorator
Def use_logging (func): def wrapper (): logging. warn ("% s is running" % func. _ name _) return func () # When passing foo as a parameter, executing func () is equivalent to executing foo () return wrapperdef foo (): print ('I am Foo') foo = use_logging (foo) # The function object wrapper returned by the decorator use_logging (foo). This statement is equivalent to foo = wrapperfoo () # executing foo () is equivalent to executing wrapper ()
Use_logging is a decor
before executing a_func ()# I AM the another function which needs some decoration to remove my foul smell# I am doing some boring work after executing a_func ()Here @a_new_decorator is equivalent to A_new_decorator (b_function_requiring_decoration)6) Get NameFor the a_function_requiring_decoration in 4, we printed print (a_function_requiring_decoration.__name__) to get the result wrapthefunction , and what we actually want to get is the name of the A_function_requiring_decoration function that
One: Internal insert1:append: Appends content to each matching element.$("p").append("2:appendto (content): Appends all matching elements to another specified set of element elements.$("p").appendTo("div");3:prepend (content): The contents of the predecessor to each matched element.$("p").prepend("4:prependto (content): puts all matching elements in front of another, specified set of element elements.$("p").prependTo("#foo");Two: External insertion1:after (content): Inserts the contents after ea
functions with hope, for example, to decorate B with aJust on the line that defines the B function, write the @A
def A(): pass @A def B(): pass
Summary: Understanding is the decorator is actually a function of a parameter, and the parameter is a function of another functionThe purpose of using adorners is generally to change some properties/behaviors of a function at run time, you can add an adorner to the function, let the decorator go before and after the funct
"Useful information for functions"例:def login(user, pwd): ‘‘‘ 功能:登录调用 参数:分别有user和pwd,作用分别是用户和密码; return: 返回值是登录成功与否(True,False) ‘‘‘ print"欢迎登录")print(login.__name__#查看函数名字print(login.__doc__) #查看函数注释login 功能:登录调用 参数:分别有user和pwd,作用分别是用户和密码; return: 返回值是登录成功与否(True,False)The name of the function. __name__ this is the way to see the names of the functionsThe function name. __doc__ This is the way to see the commentThe above two methods are useful in the Operation audit l
constructors
No Custom function
7, Boolean
Final class
Starting from 1.0 there are
Implement Java.io.serializable,comparable
The Boolean class boolean wraps the value of the base type in an object. An Boolean object of one type contains only one boolean field of type. In addition, this class boolean String provides many methods for reciprocal conversions and provides boolean some other constants and methods that are usef
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