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Checking network connection
...tp://216.58.192.142', timeout=1)
return True
except urllib2.URLError as err:
return False
Currently, 216.58.192.142 is one of the IP addresses for google.com. Change http://216.58.192.142 to whatever site can be expected to respond quickly.
This fixed IP will not map to goog...
How to do an INNER JOIN on multiple columns
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OK, I tried the above solution and go the following error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'INNER_JOIN airports to_port ON (to_port.code = flights.tairport) WHERE ' a...
Is it safe to use -1 to set all bits to true?
... the data type you use (unsigned and no larger) twice, which could lead to errors. The error is most likely to show up if the assignment and initial variable declaration are farther apart, though.
– David Stone
Dec 13 '12 at 1:26
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What's the best way to iterate over two or more containers simultaneously
... access through the zip_c... functions.
And if you're an advocate of nice error messages, like me, then you probably want this, which checks if any temporary containers were passed to any of the zip_... functions, and prints a nice error message if so.
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PostgreSQL Crosstab Query
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This does not work for me, for postgresql. I get the error ERROR: 42803: aggregate function calls may not be nested
– Audrey
Nov 12 '14 at 12:05
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Django migration strategy for renaming a model and relationship fields
...ions.RenameField('YetAnotherModel', 'foo', 'bar')
]
You may get some errors if you don't update the names where it's imported e.g. admin.py and even older migration files (!).
Update: As ceasaro mentions, newer versions of Django are usually able to detect and ask if a model is renamed. So tr...
Accidentally committed .idea directory files into git
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If you get @annedroiid error of 'did not match any files', you can try and add its path. Like when I was deleting the database.yml file, I simply did 'git rm -r --cached config/database.yml'
– Kaka Ruto
Mar 15...
How to prune local tracking branches that do not exist on remote anymore
...to squash commits on merge, which gets us The branch x is not fully merged errors when running with -d.
– Mateus Gondim
Mar 9 '18 at 13:40
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Get generated id after insert
...he insert method returns the id of row just inserted or -1 if there was an error during insertion.
long id = db.insert(...);
where db is SQLiteDatabase.
share
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improve this answer
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Find running median from a stream of integers
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Count-Min Sketch is better than P^2 in that it also gives error bound while the latter does not.
– sinoTrinity
Feb 25 '15 at 17:29
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