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How to 'bulk update' with Django?
...
Update:
Django 2.2 version now has a bulk_update.
Old answer:
Refer to the following django documentation section
Updating multiple objects at once
In short you should be able to use:
ModelClass.objects.filter(name='bar').update(name="foo")
...
Fastest way to list all primes below N
...tmp) )//const
del_mult(tmptk[off], start, prime)
# now we go back to top tk1, so we need to increase pos by 1
pos += 1
cpos = const * pos
# 30k + 1
if tk1[pos]:
prime = cpos + 1
p.append(prime)
lastadded = 1
...
Detect enter press in JTextField
...d textField = new JTextField(10);
textField.addActionListener( action );
Now the event is fired when the Enter key is used.
Also, an added benefit is that you can share the listener with a button even if you don't want to make the button a default button.
JButton button = new JButton("Do Someth...
Access properties file programmatically with Spring?
...ceholder
implementation injected by the context:property-placeholder tag.
Now as a final note, if you really need a to capture all placeholder properties and their values, you have to pipe them through StringValueResolver to make sure that placeholders work inside the property values as expected. T...
Convert NSArray to NSString in Objective-C
...rWords = [myString componentsSeparatedByString:@" "];
// yourWords is now: [@"This", @"is", @"a", @"test", @"string"]
if you need to split on a set of several different characters, use NSString’s componentsSeparatedByCharactersInSet:
NSString *yourString = @"Foo-bar/iOS-Blog";
NSArray *you...
What is a difference between
... arrays are what we call reifiable types. This means that at runtime Java knows that this array was actually instantiated as an array of integers which simply happens to be accessed through a reference of type Number[].
So, as you can see, one thing is the actual type of the object, and another thin...
Run cURL commands from Windows console
...ble, but rather just need to e.g. see or save the results of a GET request now and again, can use powershell directly. From a normal command prompt, type:
powershell -Command "(new-object net.webclient).DownloadString('http://example.com')"
which, while a bit wordy, is similar to typing
curl htt...
How to show Page Loading div until the page has finished loading?
...at;
background-attachment: fixed;
background-position: center;
}
Now we need to create our div with this class which cover entire page as an overlay whenever the page is getting loaded
<div id="coverScreen" class="LockOn">
</div>
Now we need to hide this cover screen whenev...
Download file from an ASP.NET Web API method using AngularJS
...e available saveBlob support caused an exception; hence why the code below now tests for navigator.msSaveBlob separately. Thanks? Microsoft
// Based on an implementation here: web.student.tuwien.ac.at/~e0427417/jsdownload.html
$scope.downloadFile = function(httpPath) {
// Use an arraybuffer
...
Regex Named Groups in Java
...
(Update: August 2011)
As geofflane mentions in his answer, Java 7 now support named groups.
tchrist points out in the comment that the support is limited.
He details the limitations in his great answer "Java Regex Helper"
Java 7 regex named group support was presented back in September 2...