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Why is iterating through a large Django QuerySet consuming massive amounts of memory?
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Nate C was close, but not quite.
From the docs:
You can evaluate a QuerySet in the following ways:
Iteration. A QuerySet is iterable, and it executes its database query the first time you iterate over it. For example, this will print the headline...
How to install CocoaPods?
...essage that says
"Pod installation complete! There are X dependencies from the Podfile
and X total pods installed."
Now close your Xcode project. Then locate and open the .xcworkspace Xcode project file and start coding. (You should no longer open the xcodeproj file)
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When to use PNG or JPG in iPhone development?
... extra CPU energy to display. However, large PNGs may take longer to read from storage than more compressed image formats, and thus be slower to display.
JPG's are smaller to store, but lossy (amount depends on compression level), and to display them requires a much more complicated decoding algor...
How to write DataFrame to postgres table?
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Starting from pandas 0.14 (released end of May 2014), postgresql is supported. The sql module now uses sqlalchemy to support different database flavors. You can pass a sqlalchemy engine for a postgresql database (see docs). E.g.:
fro...
Remove an item from a dictionary when its key is unknown
What is the best way to remove an item from a dictionary by value, i.e. when the item's key is unknown? Here's a simple approach:
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A generic error occurred in GDI+, JPEG Image to MemoryStream
... new MemoryStream())
{
dst.Save(m, format);
var img = Image.FromStream(m);
//TEST
img.Save("C:\\test.jpg");
var bytes = PhotoEditor.ConvertImageToByteArray(img);
return img;
}
It appears that the memory stream that the object was created on has to be ...
Xcode Simulator: how to remove older unneeded devices?
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Did you tried to just delete the 4.3 SDK from within the Xcode Package?
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs
please also delete the corresponding .dmg file in
~/Library/Caches/com.apple.dt.Xcode/Downl...
How can I get the count of milliseconds since midnight for the current?
Note, I do NOT want millis from epoch. I want the number of milliseconds currently on the clock.
11 Answers
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What is the difference between Hibernate and Spring Data JPA
...nce api which provide specification for persisting, reading, managing data from your java object to relations in database.
Hibernate: There are various provider which implement jpa. Hibernate is one of them. So we have other provider as well. But if using jpa with spring it allows you to switch to d...
Pod install is staying on “Setting up CocoaPods Master repo”
I'm cloning a project from a git repo, but when I execute pod install the first line I see is "Setting up CocoaPods Master repo" and after that I can't see anything more, the console stops there.
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