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How to do SELECT COUNT(*) GROUP BY and ORDER BY in Django?
...('actor').annotate(total=Count('actor')).order_by('total')
values() : specifies which columns are going to be used to "group by"
Django docs:
"When a values() clause is used to constrain the columns that are
returned in the result set, the method for evaluating annotations is
slightly different. I...
Infinite scrolling with React JS
...s is a great technique... thx! However, it fails when the recordHeight is different for each row. I'm experimenting with a fix for that situation. I'll post it if I get it to work.
– manalang
Jun 26 '14 at 18:42
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Why does int num = Integer.getInteger(“123”) throw NullPointerException?
...ring nm): Determines the integer value of the system property with the specified name. If there is no property with the specified name, if the specified name is empty or null, or if the property does not have the correct numeric format, then null is returned.
In other words, this method has noth...
What is a domain specific language? Anybody using it? And in what way?
I guess I am looking for some kind of intro and see if anybody have used it. Are there any particular advantages of using it?
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What's the best way to determine the location of the current PowerShell script?
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If you are creating a V2 Module, you can use an automatic variable called
$PSScriptRoot.
From PS > Help automatic_variable
$PSScriptRoot
Contains the directory from which the script module is being executed.
...
Git diff -w ignore whitespace only at start & end of lines
I love to use git diff -w to ignore whitespace differences. But, I just noticed that it ignores even whitespace differences in the middle of lines. How could I only ignore whitespace differences that come at the start (^) or end ($) of lines?
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Changing the current working directory in Java?
...OutputStreams.
The File(String parent, String child) constructor can help if you build up your directory path separately from your file path, allowing easier swapping.
An alternative is to set up a script to run Java from a different directory, or use JNI native code as suggested below.
The relev...
Setting unique Constraint with fluent API?
... IsUnique = true, Order = 2)]
public int UniqueKeyIntPart2 { get; set; }
If the data type is string, then MaxLength attribute must be added:
[Index("IX_UniqueKeyString", IsUnique = true, Order = 1)]
[MaxLength(50)]
public string UniqueKeyStringPart1 { get; set; }
[Index("IX_UniqueKeyString", IsU...
wait() or sleep() function in jquery?
...
That'd be .delay().
http://api.jquery.com/delay/
If you are doing AJAX stuff tho, you really shouldn't just auto write "done" you should really wait for a response and see if it's actually done.
sha...
Heavy usage of Python at Google [closed]
...ome specialized languages such as sawzall are also in the mix for very specific tasks, and of course Javascript is very important for browser-side work.
Other languages, including the ones that Greg mentioned back in '06, are either "kind of accidental" or used for other specific tasks (e.g., Objec...