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How to convert an Array to a Set in Java
...;T>(Arrays.asList(someArray)). See google.github.io/guava/releases/19.0/api/docs/com/google/common/…
– Alexander Klimetschek
Nov 11 '16 at 1:51
...
How to Display Selected Item in Bootstrap Button Dropdown Title
...sn't work for me when I have lists item <li> populated through ajax call.
so you have to delegate the event to the closest static parent with .on() jQuery method:
$(function(){
$(".dropdown-menu").on('click', 'li a', function(){
$(".btn:first-child").text($(this).text());
$...
Data binding to SelectedItem in a WPF Treeview
...SelectedItemChanged += new RoutedPropertyChangedEventHandler<object>(___ICH);
}
void ___ICH(object sender, RoutedPropertyChangedEventArgs<object> e)
{
if (SelectedItem != null)
{
SetValue(SelectedItem_Property, SelectedItem);
}
}
...
Python Create unix timestamp five minutes in the future
...
Now in Python >= 3.3 you can just call the timestamp() method to get the timestamp as a float.
import datetime
current_time = datetime.datetime.now(datetime.timezone.utc)
unix_timestamp = current_time.timestamp() # works if Python >= 3.3
unix_timestamp_pl...
How do I clone a Django model instance object and save it to the database?
...imary key of your object and run save().
obj = Foo.objects.get(pk=<some_existing_pk>)
obj.pk = None
obj.save()
If you want auto-generated key, set the new key to None.
More on UPDATE/INSERT here.
Official docs on copying model instances: https://docs.djangoproject.com/en/2.2/topics/db/que...
Function in JavaScript that can be called only once
...
If by "won't be executed" you mean "will do nothing when called more than once", you can create a closure:
var something = (function() {
var executed = false;
return function() {
if (!executed) {
executed = true;
// do something
}
...
What is this: [Ljava.lang.Object;?
...ct) and then reflecting on the returned Class object. Ideally, though, the API should've been designed such that reflection is not necessary (see Effective Java 2nd Edition, Item 53: Prefer interfaces to reflection).
On a more "useful" toString for arrays
java.util.Arrays provides toString overl...
How to create a GUID/UUID using iOS
...tring = CFUUIDCreateString(NULL, theUUID);
CFRelease(theUUID);
return (__bridge NSString *)string;
}
EDIT: Jan, 29 2014:
If you're targeting iOS 6 or later, you can now use the much simpler method:
NSString *UUID = [[NSUUID UUID] UUIDString];
...
What are file descriptors, explained in simple terms?
...you open a network socket, it is also represented by an integer and it is called Socket Descriptor.
I hope you understand.
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SQL Server Insert if not exists
...ode
BEGIN
INSERT INTO EmailsRecebidos (De, Assunto, Data)
VALUES (@_DE, @_ASSUNTO, @_DATA)
WHERE NOT EXISTS ( SELECT * FROM EmailsRecebidos
WHERE De = @_DE
AND Assunto = @_ASSUNTO
AND Data = @_DATA);
END
replace with
BEGIN
I...