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What is the purpose of the '@' symbol in CSS?
...ace (CSS3) constructs. The @ syntax itself, though, as I mentioned, is not new.
These are all known in CSS as at-rules. They're special instructions for the browser, not directly related to styling of (X)HTML/XML elements in Web documents using rules and properties, although they do play important ...
Quick way to list all files in Amazon S3 bucket?
...
Could you add a variant to this using the new boto3 package?
– yeliabsalohcin
Jan 9 '18 at 11:04
...
Create a custom event in Java
...Hello"
class Initiater {
private List<HelloListener> listeners = new ArrayList<HelloListener>();
public void addListener(HelloListener toAdd) {
listeners.add(toAdd);
}
public void sayHello() {
System.out.println("Hello!!");
// Notify everybody t...
Django REST Framework: adding additional field to ModelSerializer
...
if you want read and write on your extra field, you can use a new custom serializer, that extends serializers.Serializer, and use it like this
class ExtraFieldSerializer(serializers.Serializer):
def to_representation(self, instance):
# this would have the same as body as i...
onchange event on input type=range is not triggering in firefox while dragging
..."> , Firefox triggers an onchange event only if we drop the slider to a new position where Chrome and others triggers onchange events while the slider is dragged.
...
InputStream from a URL
...m() with a proper URL (including the protocol!). E.g.
InputStream input = new URL("http://www.somewebsite.com/a.txt").openStream();
// ...
See also:
Using java.net.URLConnection to fire and handle HTTP requests
share
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INSERT statement conflicted with the FOREIGN KEY constraint - SQL Server
...as familiar with SQL. I am fairly apt at writing code but SQL queries are new to me as well as building database tables.
Despite the checked answer being correct:
Mike M wrote-
"The way a FK works is it cannot have a value in that column that is
not also in the primary key column of the referenced...
Set custom HTML5 required field validation message
...nd doesn't apply to your case. At any rate, the technology is still fairly new and not widely-supported enough for most, so whatever your implementation in my opinion you are still better off using an alternative solution for the time being.
– Levi Botelho
May ...
Execute AsyncTask several times
...ask instances can only be used one time.
Instead, just call your task like new MyAsyncTask().execute("");
From the AsyncTask API docs:
Threading rules
There are a few threading rules that must be followed for this class to work properly:
The task instance must be created on the UI thread.
execute(P...
The Guava library: What are its most useful and/or hidden features? [closed]
I have had a quick scan of the Guava API and the new collection types it provides( Multimap and BiMap for example appear useful) and I am thinking of including the library in the project(s) I work on.
...