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Filtering for empty or NULL names in a queryset
...at simple. filter is used to match and exclude is to match everything but what it specifies. This would evaluate into SQL as NOT alias='' AND alias IS NOT NULL.
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How can I upgrade specific packages using pip and a requirements file?
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@a1an please suggest what extra info that you think should be added in a "suggested edit". Thanks
– Aaron Lelevier
Jun 2 '15 at 14:22
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Undefined reference to `sin` [duplicate]
...9 'extended desciption — standard libraries' specifies the libraries somewhat differently — noting that the content of -lm (as one amongst a number of others) may be linked without necessarily needing an explicit mention on the linking command line. The quote in the answer is from SVID 4th Edit...
How to allow to accept only image files?
...e/*" />
Note that this only provides a hint to the browser as to what file-types to display to the user, but this can be easily circumvented, so you should always validate the uploaded file on the server also.
It should work in IE 10+, Chrome, Firefox, Safari 6+, Opera 15+, but support ...
How to remove trailing whitespaces with sed?
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Hey, that's just what I needed! The other sed solutions posted had issue integrating with a piped (and piped and piped...) variable assignment in my bash script, but yours worked out of the box.
– Eric L.
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Using CSS in Laravel views?
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If this doesn't work for you, here's what worked for me: stackoverflow.com/questions/15232600/…
– Dan Klos
Oct 1 '15 at 15:18
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Finding median of list in Python
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What if you want to find median of a sorted array. So you cannot use built in function statistics.median because it will slow down while sorting again
– GilbertS
Feb 22 at 16:44
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How is this fibonacci-function memoized?
By what mechanism is this fibonacci-function memoized?
4 Answers
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Byte array to image conversion
...output.UnlockBits(bmpData);
return output;
}
}
To illustrate what it can lead to, let's generate PixelFormat.Format24bppRgb gradient image 101x101:
var width = 101;
var height = 101;
var gradient = new byte[width * height * 3 /* bytes per pixel */];
for (int i = 0, pixel = 0; i < g...
Filter rows which contain a certain string
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what if the column name contains a space. like Tracking Pixels.
– MySchizoBuddy
May 9 '15 at 23:19
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