Questions tagged [attributes]
The attributes tag should be used for any issues relating to a property of an object, element, or file, etc.
13,116
questions
2439
votes
16
answers
1.5m
views
How to check if an object has an attribute?
How do I check if an object has some attribute? For example:
>>> a = SomeClass()
>>> a.property
Traceback (most recent call last):
File "<stdin>", line 1, in <...
- 40.8k
1381
votes
8
answers
773k
views
What is the purpose of the "role" attribute in HTML?
I keep seeing role attributes in some people's work. I use it too, but I'm not sure about its effect.
For example:
<header id="header" role="banner">
Header stuff in here
...
- 13.9k
947
votes
7
answers
228k
views
What are differences between AssemblyVersion, AssemblyFileVersion and AssemblyInformationalVersion?
There are three assembly version attributes. What are differences? Is it ok if I use AssemblyVersion and ignore the rest?
MSDN says:
AssemblyVersion:
Specifies the version of the assembly being ...
- 35.5k
898
votes
21
answers
544k
views
Difference between id and name attributes in HTML
What is the difference between the id and name attributes? They both seem to serve the same purpose of providing an identifier.
I would like to know (specifically with regards to HTML forms) whether ...
- 14.7k
546
votes
5
answers
333k
views
Why use Ruby's attr_accessor, attr_reader and attr_writer?
Ruby has this handy and convenient way to share instance variables by using keys like
attr_accessor :var
attr_reader :var
attr_writer :var
Why would I choose attr_reader or attr_writer if I could ...
- 18k
509
votes
21
answers
771k
views
Python dictionary from an object's fields
Do you know if there is a built-in function to build a dictionary from an arbitrary object? I'd like to do something like this:
>>> class Foo:
... bar = 'hello'
... baz = 'world'
...
...
- 13.1k
453
votes
4
answers
284k
views
Specify multiple attribute selectors in CSS
What is the syntax for doing something like:
input[name="Sex" AND value="M"]
Basically, I want to select the input element that has the attribute name="Sex" as well as the attribute value="M":
<...
- 33k
439
votes
18
answers
574k
views
How can I create an object and add attributes to it?
I want to create a dynamic object in Python and then add attributes to it. This didn't work:
obj = object()
obj.somefield = "somevalue"
AttributeError: 'object' object has no attribute '...
- 21.4k
424
votes
34
answers
359k
views
Accessing dict keys like an attribute?
I find it more convenient to access dict keys as obj.foo instead of obj['foo'], so I wrote this snippet:
class AttributeDict(dict):
def __getattr__(self, attr):
return self[attr]
def ...
- 6,125
356
votes
1
answer
19k
views
List view getListItemXmlAttributes method fails with child publication items
I have created a JS class to populate SG/Folder list view data, when items are modified. (As per Jaime's approach)
Everything works great when I operate on items in the publication they're created in.
...
- 4,123
355
votes
2
answers
489k
views
correct way to define class variables in Python [duplicate]
I noticed that in Python, people initialize their class attributes in two different ways.
The first way is like this:
class MyClass:
__element1 = 123
__element2 = "this is Africa"
def ...
- 4,673
336
votes
22
answers
409k
views
private final static attribute vs private final attribute
In Java, what's the difference between:
private final static int NUMBER = 10;
and
private final int NUMBER = 10;
Both are private and final, the difference is the static attribute.
What's better? ...
okami
335
votes
5
answers
274k
views
How do I remove the "extended attributes" on a file in Mac OS X?
I have an AppleScript script that runs a stress test. Part of the test is to open, save, and close certain files. Somehow, the files have picked up some "extended attributes" that prohibit the files ...
- 3,359
315
votes
14
answers
155k
views
When to use setAttribute vs .attribute= in JavaScript?
Has a best-practice around using setAttribute instead of the dot (.) attribute notation been developed?
E.g.:
myObj.setAttribute("className", "nameOfClass");
myObj.setAttribute("id", "someID");
or
...
- 79k
295
votes
3
answers
176k
views
How to access (get or set) object attribute given string corresponding to name of that attribute
How do you set/get the values of attributes of t given by x?
class Test:
def __init__(self):
self.attr1 = 1
self.attr2 = 2
t = Test()
x = "attr1"
- 11.1k
272
votes
5
answers
299k
views
How do you programmatically set an attribute?
Suppose I have a python object x and a string s, how do I set the attribute s on x? So:
>>> x = SomeObject()
>>> attr = 'myAttr'
>>> # magic goes here
>>> x.myAttr
...
- 21.9k
270
votes
7
answers
500k
views
How to change an element's title attribute using jQuery
I have an form input element and want to change its title attribute. This has to be easy as pie, but for some reason I cannot find how to do this. How is this done, and where and how should I be ...
- 8,227
259
votes
7
answers
167k
views
Set attribute without value
How do I set a data attribute without adding a value in jQuery? I want this:
<body data-body>
I tried:
$('body').attr('data-body'); // this is a getter, not working
$('body').attr('data-body',...
- 108k
254
votes
6
answers
263k
views
Get Enum from Description attribute [duplicate]
Possible Duplicate:
Finding an enum value by its Description Attribute
I have a generic extension method which gets the Description attribute from an Enum:
enum Animal
{
[Description("")]
...
- 52.9k
253
votes
17
answers
261k
views
Select elements by attribute
I have a collection of checkboxes with generated ids and some of them have an extra attribute. Is it possible to use JQuery to check if an element has a specific attribute?
For example, can I verify ...
- 2,821
252
votes
1
answer
171k
views
What’s the purpose of the HTML "nonce" attribute for script and style elements?
W3C says there is a new attribute in HTML5.1 called nonce for style and script that can be used by the Content Security Policy of a website.
I googled about it but finally didn't get it what actually ...
- 3,516
251
votes
7
answers
326k
views
Iterate over object attributes in python [duplicate]
I have a python object with several attributes and methods. I want to iterate over object attributes.
class my_python_obj(object):
attr1='a'
attr2='b'
attr3='c'
def method1(self, ...
- 26.8k
245
votes
8
answers
185k
views
Python function attributes - uses and abuses [closed]
Not many are aware of this feature, but Python's functions (and methods) can have attributes. Behold:
>>> def foo(x):
... pass
...
>>> foo.score = 10
>>> dir(foo)
[...
- 268k
244
votes
6
answers
51k
views
What is the point of noreturn?
[dcl.attr.noreturn] provides the following example:
[[ noreturn ]] void f() {
throw "error";
// OK
}
but I do not understand what is the point of [[noreturn]], because the return type of the ...
- 63.4k
233
votes
8
answers
88k
views
What's the difference between a Python "property" and "attribute"?
I am generally confused about the difference between a "property" and an "attribute", and I can't find a great resource to concisely detail the differences.
- 17.5k
216
votes
10
answers
449k
views
Extracting an attribute value with beautifulsoup
I am trying to extract the content of a single "value" attribute in a specific "input" tag on a webpage. I use the following code:
import urllib
f = urllib.urlopen("http://58....
- 2,285
201
votes
21
answers
538k
views
Getting attributes of a class
I want to get the attributes of a class, say:
class MyClass():
a = "12"
b = "34"
def myfunc(self):
return self.a
using MyClass.__dict__ gives me a list of attributes and functions, and ...
- 7,869
193
votes
20
answers
347k
views
Get all Attributes from a HTML element with Javascript/jQuery
I want to put all attributes in a Html element into an array:
like i have a jQuery Object, whichs html looks like this:
<span name="test" message="test2"></span>
now one way is to use ...
- 2,427
185
votes
5
answers
282k
views
Are complex expressions possible in ng-hide / ng-show?
I want to do so:
ng-hide="!globals.isAdmin && mapping.is_default"
but the expression evaluates always to false.
I do not want to define special function on $scope.
- 26.2k
176
votes
9
answers
119k
views
How enumerate all classes with custom class attribute?
Question based on MSDN example.
Let's say we have some C# classes with HelpAttribute in standalone desktop application. Is it possible to enumerate all classes with such attribute? Does it make sense ...
- 12.9k
174
votes
3
answers
57k
views
Why "decimal" is not a valid attribute parameter type?
It is really unbelievable but real. This code will not work:
[AttributeUsage(AttributeTargets.Property|AttributeTargets.Field)]
public class Range : Attribute
{
public decimal Max { get; set; }
...
- 43.2k
172
votes
11
answers
159k
views
Get list of data-* attributes using javascript / jQuery
Given an arbitrary HTML element with zero or more data-* attributes, how can one retrieve a list of key-value pairs for the data.
E.g. given this:
<div id='prod' data-id='10' data-cat='toy' data-...
- 85.6k
171
votes
1
answer
246k
views
Getting the value of an attribute in XML
How would one get the value of attribute1 (blah) in the following xml using xslt:
<name attribute1="blah" attribute2="blahblah">
</name>
- 18.9k
168
votes
8
answers
56k
views
What are the best practices for using Assembly Attributes?
I have a solution with multiple project. I am trying to optimize AssemblyInfo.cs files by linking one solution wide assembly info file. What are the best practices for doing this? Which attributes ...
- 35.5k
163
votes
11
answers
94k
views
How to Compare Flags in C#?
I have a flag enum below.
[Flags]
public enum FlagTest
{
None = 0x0,
Flag1 = 0x1,
Flag2 = 0x2,
Flag3 = 0x4
}
I cannot make the if statement evaluate to true.
FlagTest testItem = ...
- 72.8k
160
votes
5
answers
76k
views
What is the difference between class and instance attributes?
Is there any meaningful distinction between:
class A(object):
foo = 5 # some default value
vs.
class B(object):
def __init__(self, foo=5):
self.foo = foo
If you're creating a lot ...
- 4,178
156
votes
6
answers
334k
views
javascript remove "disabled" attribute from html input
How can I remove the "disabled" attribute from an HTML input using javascript?
<input id="edit" disabled>
at onClick I want my input tag to not consist of "disabled" attribute.
- 6,751
154
votes
10
answers
114k
views
Can attributes be added dynamically in C#?
Is it possible to add attributes at runtime or to change the value of an attribute at runtime?
- 2,962
153
votes
7
answers
513k
views
Define an <img>'s src attribute in CSS [duplicate]
I need to define an <img>'s src attribute in CSS. Is there a way to specify this attribute?
- 4,433
151
votes
8
answers
234k
views
Get all attributes of an element using jQuery
I am trying to go through an element and get all the attributes of that element to output them, for example an tag may have 3 or more attributes, unknown to me and I need to get the names and values ...
- 10.4k
143
votes
11
answers
59k
views
Custom Compiler Warnings
When using the ObsoleteAtribute in .Net it gives you compiler warnings telling you that the object/method/property is obsolete and somthing else should be used. I'm currently working on a project that ...
- 114k
141
votes
8
answers
138k
views
Set attributes from dictionary in python
Is it possible to create an object from a dictionary in python in such a way that each key is an attribute of that object?
Something like this:
d = { 'name': 'Oscar', 'lastName': 'Reyes', 'age':32 }...
- 198k
141
votes
4
answers
99k
views
Test if a class has an attribute?
I'm trying to do a little Test-First development, and I'm trying to verify that my classes are marked with an attribute:
[SubControllerActionToViewDataAttribute]
public class ScheduleController : ...
- 10.2k
139
votes
16
answers
107k
views
NUnit Test Run Order
By default nunit tests run alphabetically. Does anyone know of any way to set the execution order? Does an attribute exist for this?
- 6,422
137
votes
3
answers
67k
views
XML Serialization - Disable rendering root element of array
Can I somehow disable rendering of root element of collection?
This class with serialization attributes:
[XmlRoot(ElementName="SHOPITEM", Namespace="")]
public class ShopItem
{
...
- 7,880
134
votes
11
answers
98k
views
Localization of DisplayNameAttribute
I am looking for a way to localize properties names displayed in a PropertyGrid. The property's name may be "overriden" using the DisplayNameAttribute attribute. Unfortunately attributes can not have ...
- 4,618
134
votes
3
answers
74k
views
How does inheritance work for Attributes?
What does the Inherited bool property on attributes refers to?
Does it mean that if I define my class with an attribute AbcAtribute (that has Inherited = true), and if I inherit another class from ...
- 103k
132
votes
3
answers
109k
views
JavaScript: Listen for attribute change?
Is it possible in JavaScript to listen for a change of attribute value? For example:
var element=document.querySelector('…');
element.addEventListener( ? ,doit,false);
element.setAttribute('...
- 15.3k
132
votes
9
answers
83k
views
Can a C# class inherit attributes from its interface?
This would appear to imply "no". Which is unfortunate.
[AttributeUsage(AttributeTargets.Interface | AttributeTargets.Class,
AllowMultiple = true, Inherited = true)]
public class ...
- 90.5k
131
votes
7
answers
134k
views
Unable to set data attribute using jQuery Data() API
I've got the following field on an MVC view:
@Html.TextBoxFor(model => model.Course.Title, new { data_helptext = "Old Text" })</span>
In a seperate js file, I want to set the data-helptext ...
- 29.1k