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How to dynamically compose an OR query filter in Django?
...into list of Q objects
queries = [Q(pk=value) for value in values]
# Take one Q object from the list
query = queries.pop()
# Or the Q object with the ones remaining in the list
for item in queries:
query |= item
# Query the model
Article.objects.filter(query)
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Rails auto-assigning id that already exists
...e "company", and column name "id" ... please replace them with the correct ones. You can get the sequence name with SELECT pg_get_serial_sequence('tablename', 'columname'); or look at the table definition with \d tablename.
An alternate solution is to override the save() method in your company clas...
Can I implement an autonomous `self` member type in C++?
...s helpful to avoid redundancies in the code, so that changing something in one place does not require you to change code in another place. That's the whole point of auto and decltype or in this case of self.
– Ralph Tandetzky
Jan 23 '14 at 7:59
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Difference between InvariantCulture and Ordinal string comparison
...n (I'm a native speaker). There are cases where both are legal (but often one is outdated / not recommended) and there are cases where only one form is allowed.
– enzi
Mar 22 '16 at 17:22
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Accessing constructor of an anonymous class
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OMG, did someone blamed THE Jon Skeet for copying?
– user
Aug 15 '12 at 17:43
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How to comment a block in Eclipse?
... makes it a //, and Ctrl-Command-/ makes it a /* */. Removing comments is done with Ctrl-Command-\\ .
– Angelo van der Sijpt
Jul 26 '12 at 10:39
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Get list of a class' instance methods
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Accepted answer is great but this one is likely what more people will come here for!
– Aaron
Apr 12 '16 at 14:36
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Check if a string contains a number
...rue if all characters in the string are alphabetic and there
is at least one character, false otherwise.
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How do you unit test private methods?
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@Jay - couldn't one use #if DEBUG around the InternalsVisibleTo attribute to make it not apply to release code?
– mpontillo
Dec 1 '10 at 21:42
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What's the difference between a temp table and table variable in SQL Server?
In SQL Server 2005, we can create temp tables one of two ways:
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