elegant dogs

: 1 ifnin[1,4,5,6]: To replace the following method: 1 ifn==1 or n==4 or n==5 orn==6: string/Inverse sequenceYou can use the following methods to quickly reverse the sequence of columns: 12345678 >>> a= [1,2,3,4]>>> a[::-1][4,3,2,1]# This creates a new reversed list.# If you want to reverse a list in place you can do:a.reverse() This general approach also applies in reverse order of strings:

ifsuch as e-commerce, customers to buy things, through multi-criteria screening, data exist MongoDB, attributes have price/brand/size/color.The user may not set or set multiple filter criteria, and we want to judge each one.According to the general wording, it should be:QUERYEXR = {}if Price: queryexr.update ({' P ':p rice}) If Brand: queryexr.update ({' B ': brand}) if size: Queryexr.update ({' s ': size}) If color: queryexr.update ({' c ': color}) Dp.collection.find (QUERYEXR)Too

Japanese-style fresh and elegant wind, that is, and wind, is a Japanese photographer to use a special tone. Features can be summed up as: dilute the peace, natural freehand brushwork. The highest rate of domestic awareness for Kanoeron, small Lin Jiqing, and its clear, almost sad style, attracted a large number of fans at home. Of course, there are many disgusted with the irony of the "cataract defects Photo Method" ... Tastes, please. Unfortunately,

The soft, dreamy color of the wedding film has never lacked the appreciation of the fans and advocates, they are soft and elegant color, easy to create a sweet breath and romantic atmosphere. However, this soft color, in the early stage of the shooting is almost impossible to appear perfectly, it requires the late adjustment of the steps of the fine carving, "polished" the attractive color. This article is specially aimed at the most popular soft tone

The final effect for us very much like the Japanese elegant style. Like friends can come together to study, don't forget to do homework. First look at the effect and original image: The following is a detailed tutorial " The first step: use Photoshop to open the original image, copy a layer for layer 1, in order to increase the sensitivity of the picture contrast, the implementation of graphics-adjustment-color, and then sli

Click to see more "ps wedding photo processing tutorial The tutorial teaches you to use Photoshop to get the elegant Korean style wedding photo effect, the color palette is to change the specific hue to form another tonal picture of different feelings. The correct way to learn color, first of all, is to carefully interpret the color composition of Photoshop theory, first of all, the theory of color composition chipboard, and then take some typical d

This tutorial mainly uses Photoshop to pull out the photos of the outdoor children's photo day elegant effect, Japanese and Korean photo style is full of color candy, such as orange, green, blue, pink and other high gray, high-profile colors, this color gives people the feeling is: warm, comfortable and sunny, like friends let us learn together. Effect Chart: Original: The first step: Copy the layer first I suggest in the la

The soft, dreamy color of the wedding film has never lacked the appreciation of the fans and advocates, they are soft and elegant color, easy to create a sweet breath and romantic atmosphere. However, this soft color, in the early stage of the shooting is almost impossible to appear perfectly, it requires the late adjustment of the steps of the fine carving, "polished" the attractive color. This article is specially aimed at the most popular soft tone

going to be slow to inherit so many layers? Sure, the deep prototype chain will be slow, but I have a way. Remember what happens when you write to an object's properties? Copy Code code as follows: var ego = function (x) {return x} For (var all in driver) { if (! (each in nulldriver)) { Driver[each] = ego (Driver[each]) } } Yes, the original high in the prototype chain above the method will "wow" a bit fell to the bottom! This time not to go up the prototype ch

lightweight and very user-friendly, its API is also very easy to understand, but also provides some very convenient instructions and attributes. For example: (1) Bind Click eventcan be abbreviated as: (2) Binding dynamic properties can be abbreviated as: (3) Handy modifiers (4) Practical parameter characteristics How about, is not feeling very elegant. Compact Speaking of small, it should be the first to pay attention to the source siz

many layers Is it going to be slow? Sure, the deep prototype chain will be slow, but I have a way. Remember what happens when you write to an object's properties? Copy Code code as follows: var ego = function (x) {return x} For (var all in driver) { if (! (each in nulldriver)) { Driver[each] = ego (Driver[each]) } } Yes, the original high in the prototype chain above the method will "wow" a bit fell to the bottom! This time not to go up the prototype chain, di

The previous (ASP.net extended ExtJS) article used the old method to add a subclass, creating a list Using the. NET self-action ASPX code: 　　　 .Columns 　　　 .Columns 　　　 .ToRender() %> C # code public ExtWindow Columns { 　　 T t=new T() ; 　　 columnBuilder(t); 　　 Item.Add(t); 　　 return this; } The generated JS code is still not listed as above. You can see that the method of using columns is still not elegant enough, since all controls are based

If we have more than one Linux server, and need to manage maintenance, if you are using putty, usually you will open multiple Windows without a window is a server account login. This can make you confused if we can manage through the following so is it much easier?What tools and skills do we need to complete the above operations: Generate Keys for individual servers SSH Password-free interoperability for each server http://www.voidcn.com/article/p-ficywqgl-oz.html The

(); /// /// /// /// Public Override BOOLTrysetmember (SetMemberBinder Binder,Objectvalue) {Viewdata[binder. Name]=value; return true; } }To run the code: classProgram {Static voidMain (string[] args) {Dynamic Varo=NewVarobject (); VARO.A="value"; VARO.B="2"; varo["C"] =3; varD = varo++; varE = Varo +Varo; Varo (); Varo. Method (); foreach(varVinchVaro. Getdynamicmembernames ()) {Console.WriteLine (v); } Console.WriteLine

IMPORTNBSP;JAVA.UTIL.ARRAYS;CLASSNBSP;ADD2NBSP;{NBSP;NBSP;NBSP;NBSP;INTNBSP;ADD2 (Inta,int NBSP;B) {returna+b; NBSP;}}INTERFACENBSP;ADD3NBSP;{NBSP;NBSP;NBSP;NBSP;DEFAULTNBSP;INTNBSP;ADD3 (Inta,int NBSP;B,NBSP;INTNBSP;C) {returna+b +c;}}// using the default method of the interface we implement the multi-inheritance, what thing?classaddallextends Add2implementsadd3{}publicclasstestjdk8{public staticvoidmain (String[]args) { System.out.println (Newaddall (). ADD2 (1,2)); System.out.println (Newadda

Method One: adornersWith the "adorner will only perform once" feature def Singleton(CLS):instances = []# Why this is not direct to none, because the intrinsic function cannot access the non-container variables of the external function def getinstance(*args, **kwargs): if notInstances:instances.append (CLS (*args, **kwargs))returninstances[0]returnGetInstance@singleton class Foo:A =1F1 = foo () F2 = foo ()PrintID (F1), ID (F2)Method Two: base classUse "class variable to be unique to a

longer needed!LIST-INSERT‘(L,x)1 x.next=L.nil.next2 L.nil.next.prev=x3 L.nil.next=x4 x.prev=L.nilSentinel's role and precautionsAs can be seen from the 3 operations with no Sentinels above, the Sentinel does not reduce the progressive time bounds of the algorithm, but it can reduce the constant factor, such as List-delete ' and List-insert ' both save O ( 1 ) 。 Of course, in some cases, sentinels can reduce the number of more. But it's more about

__new__: Object creation , is a static method, the first parameter is CLS. (Think about it too, it can't be self, the object hasn't been created, it's self)__INIT__: initialization of an object, is an instance method, and the first argument is self.__call__: Object cancall, note is not a class, is an object.It is created before it is initialized. Namely first __new__, then __init__.The above is not a good understanding, see examples.For __new__Class Bar (object): passclass foo (object): de