attributes

问题 I have the following XSD (part of the XSD) <xs:element name="sourceValue" minOccurs="0" maxOccurs="unbounded"> <xs:complexType> <xs:simpleContent> <xs:extension base="xs:normalizedString"> <xs:attribute name="label" type="xs:normalizedString" use="required"/> </xs:extension> </xs:simpleContent> </xs:complexType> </xs:element> In my XML I have: <?xml version="1.0" encoding="UTF-8"?> <Record xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="assertion.xsd">

问题 I'm trying to make a turtle game on Repl.it and I don't know why this error keeps coming up. Here is my code: import turtle wn = turtle.Screen() wn.bgcolor("white") wn.setup(width=800, height=800) wn.tracer(0) # Set up the ground ground = turtle.Turtle() ground.color("white") ground.shape("square") ground.speed(0) ground.shapesize(stretch_wid=200, stretch_len=20) ground.speed(0) ground.color("black") ground.penup() ground.goto(0, -400) ground.direction = "stop" 回答1: It seems that the

问题 Is this any possible way to set or change windows file and folder attribute with php? I'm creating desktop.ini file in some folders with php. But I need to make it HSA - Hidden, System file, Archive - In addition I need to make folder read-only which is a R flag. Is there anyway to do that with PHP ? please help me! 回答1: Finally I find the answer, exec("attrib +r <any directory>"); exec("attrib +h +s +a desktop.ini"); 来源： https://stackoverflow.com/questions/49629856/how-to-manipulate-windows

问题 I am at the very beginning with Python, and this is a very general question on the logic and implementation of classes. I apologize for the basic level of the question, but hopefully it will be useful for others too. Here is some context to make it clearer: Context I want to create a class representing an image. This image includes 3 bands (R,G,B, associated with 3 different files) and some metadata (one file, which contains the file path of the 3 bands files and other info like camera, geo

问题 I am at the very beginning with Python, and this is a very general question on the logic and implementation of classes. I apologize for the basic level of the question, but hopefully it will be useful for others too. Here is some context to make it clearer: Context I want to create a class representing an image. This image includes 3 bands (R,G,B, associated with 3 different files) and some metadata (one file, which contains the file path of the 3 bands files and other info like camera, geo

问题 I need a Guid property in some attribute class like this: public class SomeAttribute : Attribute { private Guid foreignIdentificator; public Guid ForeignIdentificator { get { return this.foreignIdentificator; } set { this.foreignIdentificator = value; } } } But in attribute definition I can use only primitive types, which are constants ( I understand why, and it's make me sense ). The workaround can be definition "ForeignIdentificator" as string, and creating Guid in runtime: public class

问题 I have created a Woocommerce plugin and require it to do two things: Send a notification message to a specific email address, based on which product variation is in the cart. The email must contain only the relevant product, and not products that contain other attributes. For example: Product A has an Attribute named Chef, with chef-one and chef-two as variable Terms. The user may select Product A from chef-one or chef-two. If the user selects Product A from chef-one, a notification email

问题 I stumbled across this behaviour, which suggests that you can use getattr to call methods on a class instance, as an alternative to the intuitively named operator.methodcaller : from operator import methodcaller class Foo(): def __init__(self, lst): self.lst = lst def summer(self): return sum(self.lst) my_obj = Foo(range(11)) res1 = methodcaller('summer')(my_obj) # 55 res2 = getattr(my_obj, 'summer')() # 55 assert res1 == res2 I'd like to understand, internally, why this works. Is it because

问题 TL;DR: Although I can edit component attributes directly in XML (sanity check — I'm sane) the Attributes inspector pane claims nothing is selected. I.e. "It doesn't work." I added a CardView to the main layout. It does show up in the Component Tree and in the Design Editor. I select the CardView in the Component Tree pane, but the Attributes pane says "No component selected". I'm using Android Studio 3.5.2 on MacOS 10.15.1. This happens with all three CardViews (see screenshot). Clicking the

问题 I'm researching someone else's code and there is a method like this: public SomeClass DoSomething(string param1, [Optional, DefaultParameterValue("")] string optional) Why would someone use these attributes instead of public SomeClass DoSomething(string param1, string optional = "") Is there any difference in the behavior, etc.? 回答1: If they weren't using C# 4, for example? I believe the second version will compile into exactly the first version... (I've compiled them both and run them