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How to convert nanoseconds to seconds using the TimeUnit enum?
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This answer is now wrong - convert() and the toFoo() methods all return longs now docs.oracle.com/javase/6/docs/api/java/util/concurrent/…
– Riking
Jul 30 '13 at 1:58
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What is the reason for having '//' in Python? [duplicate]
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In Python 3, they made the / operator do a floating-point division, and added the // operator to do integer division (i.e. quotient without remainder); whereas in Python 2, the / operator was simply integer division, unless one of the operands was already a floating point number.
In Python 2...
Determine the number of NA values in a column
...r of NA values in a data frame column. Say my data frame is called df , and the name of the column I am considering is col . The way I have come up with is following:
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Do I have to Close() a SQLConnection before it gets disposed?
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Since you have a using block, the Dispose method of the SQLCommand will be called and it will close the connection:
// System.Data.SqlClient.SqlConnection.Dispose disassemble
protected override void Dispose(bool disposing)
{
if (disposing)
{
this._userConnectionOptions =...
Python “SyntaxError: Non-ASCII character '\xe2' in file”
I am writing some python code and I am receiving the error message as in the title, from searching this has to do with the character set.
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Extract month and year from a zoo::yearmon object
... "%m"))
[1] 3
> as.numeric(format(date1, "%Y"))
[1] 2012
See ?yearmon and ?strftime for details - the latter explains the placeholder characters you can use.
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Adding one day to a date
...se fatal errors when run on your host ;)
– Henrik Erlandsson
Jan 13 '15 at 13:18
Don't apologize. Some people posted t...
Git: See my last commit
...s noted by other folks in this question, you can use git log -1, git show, and git diff to get the same sort of output. Personally, I tend to use git show <rev> when looking at individual revisions.
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How do I convert a Django QuerySet into list of dicts?
...dicts its actually a <class 'django.db.models.query.ValuesQuerySet'> and not a list.
– dm03514
Oct 18 '11 at 18:31
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Add number of days to a date
...time
expects to be given a string containing a US English date format and will try to parse that format into a Unix timestamp (the number of seconds since January 1 1970 00:00:00 UTC), relative to the timestamp given in now, or the current time if now is not supplied.
while date
Returns ...