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How to do SELECT COUNT(*) GROUP BY and ORDER BY in Django?
...y('total')
Transaction.objects.all().values('actor').annotate(total=Count('id')).order_by('total')
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Set the selected index of a Dropdown using jQuery
...t selector is pretty slow. It will scan every DOM element looking for the ids. It will be less of a performance hit if you can assign a class to the element.
$(".myselect")
To answer your question though, there are a few ways to change the select elements value in jQuery
// sets selected index...
How do you query for “is not null” in Mongo?
...ue. This includes documents that do not contain the field.
So in your provided case following query going to return all the documents with imageurl field exists and having not null value:
db.mycollection.find({ 'imageurl' : { $exists: true, $ne: null } });
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Center a button in a Linear layout
...
If you want to center an item in the middle of the screen don't use a LinearLayout as these are meant for displaying a number of items in a row.
Use a RelativeLayout instead.
So replace:
android:layout_gravity="center_vertical|center_horizontal"
for the re...
How to get the focused element with jQuery?
... Firefox and Safari, but nothing in IE
<form action="">
<div id="block-1" class="border">
<h4>block-1</h4>
<input type="text" value="enter name here" name="name"/>
<input type="button" value="Add name" name="addName"/>
...
How do I get the name of the active user via the command line in OS X?
...whoami' has been obsoleted, it's probably more forward compatible to use:
id -un
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“Keep Me Logged In” - the best approach
...o page within the app. In this specific application, I'm storing the user_id , first_name and last_name of the person.
...
Why would an Enum implement an Interface?
...ple here is wrong, since Enum already implements that. You can't even override it.
A better example is having an interface that defines, let's say, a data type. You can have an enum to implement the simple types, and have normal classes to implement complicated types:
interface DataType {
// met...
How do I see active SQL Server connections?
...
You can use the sp_who stored procedure.
Provides information about current users, sessions, and processes in an instance of the Microsoft SQL Server Database Engine. The information can be filtered to return only those processes that are not idle, that belong to a spec...
Is a one column table good design? [closed]
... with just one column? I know it isn't technically illegal, but is it considered poor design?
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