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Deleting all pending tasks in celery / rabbitmq
How can I delete all pending tasks without knowing the task_id for each task?
9 Answers
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How to force a web browser NOT to cache images
...for events where they fill the fields (date, place, title, description, links, etc.) and save it. On that form I allow the administrator to upload an image related to the event. On the HTML page displaying the form, I am also showing a preview of the picture uploaded (HTML img tag).
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How to avoid the “divide by zero” error in SQL?
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In order to avoid a "Division by zero" error we have programmed it like this:
Select Case when divisor=0 then null
Else dividend / divisor
End ,,,
But here is a much nicer way of doing it:
Select dividend / NULLIF(divisor, 0) ...
Now the only problem is to remember the NullIf bit, if I u...
SQL Server IN vs. EXISTS Performance
...TS will be faster because once the engine has found a hit, it will quit looking as the condition has proved true.
With IN, it will collect all the results from the sub-query before further processing.
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Performance difference for control structures 'for' and 'foreach' in C#
...any way significant or not will depend on whether you're doing any real work in the loop. In almost all cases, the difference to performance won't be significant, but the difference to readability favours the foreach loop.
I'd personally use LINQ to avoid the "if" too:
foreach (var item in list.Wh...
what is faster: in_array or isset? [closed]
This question is merely for me as I always like to write optimized code that can run also on cheap slow servers (or servers with A LOT of traffic)
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UnicodeEncodeError: 'charmap' codec can't encode - character maps to , print function [du
...ding when piping stdout in Python, but I could not get these example to work.
Following example code makes the output aware of your target charset.
# -*- coding: utf-8 -*-
import sys
print sys.stdout.encoding
print u"Stöcker".encode(sys.stdout.encoding, errors='replace')
print u"Стоескер"...
Hide/Show Column in an HTML Table
...ns and I need to implement a column chooser using jquery. When a user clicks on a checkbox I want to hide/show the corresponding column in the table. I would like to do this without attaching a class to every td in the table, is there a way to select an entire column using jquery? Below is an exa...
How can I get file extensions with JavaScript?
...information in wallacer's revised answer as well as VisioN's excellent breakdown
Edit: Just because this is the accepted answer; wallacer's answer is indeed much better:
return filename.split('.').pop();
My old answer:
return /[^.]+$/.exec(filename);
Should do it.
Edit: In response to Ph...
How can I change the color of a Google Maps marker?
I'm using the Google Maps API to build a map full of markers, but I want one marker to stand out from the others. The simplest thing to do, I think, would be to change the color of the marker to blue, instead of red. Is this a simple thing to do or do I have to create a whole new icon somehow? If I ...