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Extracting specific columns from a data frame
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177
Using the dplyr package, if your data.frame is called df1:
library(dplyr)
df1 %>%
select...
Under what circumstances is an SqlConnection automatically enlisted in an ambient TransactionScope T
...urs only when a connection is opened inside an active transaction scope.
Q7. Yes. An existing connection can be explicitly enlisted in the current transaction scope by calling EnlistTransaction( Transaction.Current ). You can also enlist a connection on a separate thread in the transaction by usi...
Python str vs unicode types
Working with Python 2.7, I'm wondering what real advantage there is in using the type unicode instead of str , as both of them seem to be able to hold Unicode strings. Is there any special reason apart from being able to set Unicode codes in unicode strings using the escape char \ ?:
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What are best practices for using SmtpClient, SendAsync and Dispose under .NET 4.0
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edited Dec 8 '17 at 7:03
user276648
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a...
“Auto Layout still required after executing -layoutSubviews” with UITableViewCell subclass
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I encountered the same problem while manually adding constraints in code. In code, I was doing t...
How to get week number in Python?
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427
datetime.date has a isocalendar() method, which returns a tuple containing the calendar week:
&...
Ignoring new fields on JSON objects using Jackson [duplicate]
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Hadi EskandariHadi Eskandari
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Unable to launch the IIS Express Web server
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answered Jun 11 '13 at 7:13
Yehuda ShapiraYehuda Shapira
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