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How to remove all of the data in a table using Django
...del._meta.db_table
sql = "DROP TABLE %s;" % (table_name, )
cursor.execute(sql)
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How do I purge a linux mail box with huge number of emails? [closed]
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It is not a good praxis data manipulation from outside an application. If there is an option or command that can do the job, it is better to use it. As @timaschew answered, you can use the ‘d’ command inside the mail tool.
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Does the join order matter in SQL?
...same as b LEFT JOIN a
Outer joins are not associative either, so in your examples which involve both (commutativity and associativity) properties:
a LEFT JOIN b
ON b.ab_id = a.ab_id
LEFT JOIN c
ON c.ac_id = a.ac_id
is equivalent to:
a LEFT JOIN c
ON c.ac_id = a.ac_id
LEFT JOIN...
Decimal number regular expression, where digit after decimal is optional
I need a regular expression that validates a number, but doesn't require a digit after the decimal.
ie.
15 Answers
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Why would I ever use push_back instead of emplace_back?
...e a bit over the past four years. I have come to the conclusion that most explanations about push_back vs. emplace_back miss the full picture.
Last year, I gave a presentation at C++Now on Type Deduction in C++14. I start talking about push_back vs. emplace_back at 13:49, but there is useful inform...
How do I fix “Failed to sync vcpu reg” error?
I'm trying to use the Intel HAX x86 emulator for Windows (8, if that matters). I installed everything and created an AVD for the android version, and everything appears correct, but when I run it, I get this output:
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Call a Server-side Method on a Resource in a RESTful Way
...tues of the Web. This is fine. What we don't really like is needless complexity. Too often a programmer or a company brings in RPC-style Services for a job that plain old HTTP could handle just fine. The effect is that HTTP is reduced to a transport protocol for an enormous XML payload that explains...
How to prompt for user input and read command-line arguments [closed]
...md module for easily creating a mini-command line interpreter (with help texts and autocompletion) and raw_input (input for Python 3+) for reading a line of text from the user.
text = raw_input("prompt") # Python 2
text = input("prompt") # Python 3
Command line inputs are in sys.argv. Try this ...
An item with the same key has already been added
...1 (it'll throw the error). Also, check to make sure there's no similar edmx names (table column has "CURRENCY", one of Navigation Properties name had "Currency")
– Robert Koch
Mar 1 '12 at 23:06
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Python 3: ImportError “No Module named Setuptools”
...-get install python3-setuptools
For an older version of Python (Python 2.x):
sudo apt-get install python-setuptools
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