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Django filter queryset __in for *every* item in list
...ld not be a problem for small set of categories.
There is the aggregation approach. This query would be shorter and perhaps quicker for a large set of categories.
You also have the option of using custom queries.
Some examples
Test setup:
class Photo(models.Model):
tags = models.ManyToMan...
Practical use of `stackalloc` keyword
... @MaxBarraclough Because you add the GC cost to heap allocations over the application lifetime. Total allocation cost = allocation + deallocation, in this case pointer bump + GC Heap, vs pointer bump + pointer decrement Stack
– Pop Catalin
Dec 18 '18 at 10:04
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How do I create a round cornered UILabel on the iPhone?
... the inspector. You won't see the rectangle until you compile and run your app, but at least you'll be able to place the subview and connect it to outlets or actions if needed.
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Invoke(Delegate)
...ound thread and this would mostly work. Sometimes it would just cause your app to exit because you were effectively interrupting the GUI thread while it was doing something else. This is the Cross Threaded Exception - imagine trying to update a TextBox while the GUI is painting something else.
Wh...
Small Haskell program compiled with GHC into huge binary
...braries are copied in verbatim.
Aside: since this is a graphics-intensive app, I'd definitely compile with ghc -O2
There's two things you can do.
Stripping symbols
An easy solution: strip the binary:
$ strip A
$ du -hs A
5.8M A
Strip discards symbols from the object file. They are generall...
How to find unused images in an Xcode project?
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Slender is paid app. several false positives and not good for commercial products. script provided by emcmanus is really great.
– Arun
Nov 15 '12 at 16:06
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Can I change the viewport meta tag in mobile safari on the fly?
I have an AJAX app built for mobile Safari browser that needs to display different types of content.
3 Answers
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Calling a function of a module by using its name (a string)
...attr can be used to determine if a function is defined. I had a database mapping (eventType and handling functionName) and I wanted to make sure I never "forgot" to define an event handler in my python
– Shaun
Jun 3 '14 at 13:20
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Openssl is not recognized as an internal or external command
I wish to generate an application signature for my app which will later be integrated with Facebook. In one of Facebook's tutorials, I found this command:
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Android Bitmap to Base64 String
...load all bytes of the image into a byte array, which will likely crash the app in low-end devices. Instead, I would first write the image to a file and read it using Apache's Base64InputStream class. Then you can create the Base64 string directly from the InputStream of that file. It will look like ...