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Combine two ActiveRecord::Relation objects
...inal question was: "is it possible to combine the two relations to produce one ActiveRecord::Relation object containing both conditions?" This answer returns an array...
– courtsimas
Aug 3 '17 at 19:02
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Java synchronized static methods: lock on object or class
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Please answer Elaborate so that everyone can understand.
– Madhu
Sep 2 '09 at 4:49
6
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How do I get the object if it exists, or None if it does not exist?
... SomeModel.objects.get(foo='bar')
except SomeModel.DoesNotExist:
go = None
What I did do, is to subclass models.Manager, create a safe_get like the code above and use that manager for my models. That way you can write: SomeModel.objects.safe_get(foo='bar').
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How to delete a remote tag?
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And just in case someone wonders how to delete multiple tags at a time you simple list them using white space, e.g. git push --delete origin tag1 tag2. Same is valid for local tags deletion git tag -d tag1 tag2
– dVaffection...
How do I control how Emacs makes backup files?
...here else in the file system, the hard link points to the backup when I'm done editing, and that's confusing and awful. How can I either eliminate these backup files, or have them go somewhere other than the same directory?
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How to refresh app upon shaking the device?
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Nice one! I've also added a check to avoid shakes too often (in my app I've set it to 750 ms after the last shake)... Calendar last = Calendar.getInstance(); Calendar now = Calendar.getInstance(); last.set...
TypeScript “this” scoping issue when called in jquery callback
...uires some initial setup but pays off with its invincibly light, literally one-word syntax is using Method Decorators to JIT-bind methods through getters.
I've created a repo on GitHub to showcase an implementation of this idea (it's a bit lengthy to fit into an answer with its 40 lines of code, in...
How to convert Strings to and from UTF8 byte arrays in Java
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@Pacerier because the docs for Charset list "UTF-8" as one of the standard charsets. I believe that your spelling is also accepted, but I went with what the docs said.
– mcherm
Jan 17 '12 at 19:44
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T-SQL: Selecting rows to delete via joins
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One question. Why do we need to write 'DELETE TableA FROM' instead of 'DELETE FROM'? I see it works only in this case, but why?
– LaBracca
Oct 20 '10 at 13:53
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Python: most idiomatic way to convert None to empty string?
... like the str() built-in, but return an empty string when the argument is None, do this:
def xstr(s):
if s is None:
return ''
return str(s)
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