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Filtering for empty or NULL names in a queryset
...e.objects.exclude(alias__isnull=True)
If you need to exclude null values and empty strings, the preferred way to do so is to chain together the conditions like so:
Name.objects.exclude(alias__isnull=True).exclude(alias__exact='')
Chaining these methods together basically checks each condition i...
Grab a segment of an array in Java without creating a new array on heap
... of an array. An example would be to get the byte array containing the 4th and 5th bytes of a byte array. I don't want to have to create a new byte array in the heap memory just to do that. Right now I have the following code:
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How to remove constraints from my MySQL table?
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Postgres, MSSQL, and Oracle all have alter table .. drop constraint. MySQL is the odd one out, it seems.
– Jared Beck
Mar 23 '15 at 23:48
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Bootstrap modal appearing under background
I have used the code for my modal straight from the Bootstrap example, and have included only the bootstrap.js (and not bootstrap-modal.js). However, my modal is appearing underneath the grey fade (backdrop) and is non editable.
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Why call git branch --unset-upstream to fixup?
...topress is not under any development since 2011, it serves my purpose well and so I haven't thought of changing anything so far.
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Mockito - difference between doReturn() and when()
...e thing or what is the subtle difference between doReturn(...).when(...) and when(...).thenReturn(...) ?
5 Answers
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How to automatically reload a page after a given period of inactivity
...the actual inactivity time. For example if the inactivity time is 1 minute and the interval is 1 minute, if the user moved the mouse after 1 second and then stopped, the refresh will only occur after 2 minutes. The lower the interval the more accurate the refresh time will be.
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Vim search and replace selected text
Let's say we have a text, and I enter visual mode and select some text. How do I quickly do a search for the highlighted text and replace it with something else?
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Catch a thread's exception in the caller thread in Python
I'm very new to Python and multithreaded programming in general. Basically, I have a script that will copy files to another location. I would like this to be placed in another thread so I can output .... to indicate that the script is still running.
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Using Pylint with Django
... or generated-members.
Use an actively developed Pylint plugin that understands Django.
This Pylint plugin for Django works quite well:
pip install pylint-django
and when running pylint add the following flag to the command:
--load-plugins pylint_django
Detailed blog post here.
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