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Check for column name in a SqlDataReader object
How do I check to see if a column exists in a SqlDataReader object? In my data access layer, I have create a method that builds the same object for multiple stored procedures calls. One of the stored procedures has an additional column that is not used by the other stored procedures. I want to ...
Reverse / invert a dictionary mapping
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edited Oct 14 '16 at 16:21
Dave Lasley
4,94111 gol...
Can virtual functions have default parameters?
...s in the base class are not inherited by derived classes.
Which default is used -- ie, the base class' or a derived class' -- is determined by the static type used to make the call to the function. If you call through a base class object, pointer or reference, the default denoted in the base cla...
Replacing NAs with latest non-NA value
... non-NA value. A simple example, using vectors (instead of a data.frame ) is the following:
18 Answers
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Why do I need to explicitly push a new branch?
...to the repository. I had to actually do: git push -u origin --all .
Why is this? Isn't a branch a new change to be pushed by default? Why do I need to run the second command?
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Android accelerometer accuracy (Inertial navigation)
...plementing an Inertial Navigation System for an Android phone, which I realise is hard given the accelerometer accuracy, and constant fluctuation of readings.
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Functional style of Java 8's Optional.ifPresent and if-not-Present?
In Java 8, I want to do something to an Optional object if it is present, and do another thing if it is not present.
12 A...
How to design a database for User Defined Fields?
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If performance is the primary concern, I would go with #6... a table per UDF (really, this is a variant of #2). This answer is specifically tailored to this situation and the description of the data distribution and access patterns describe...
DateTime2 vs DateTime in SQL Server
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The MSDN documentation for datetime recommends using datetime2. Here is their recommendation:
Use the time, date, datetime2 and
datetimeoffset data types for new
work. These types align with the SQL
Standard. They are more portable.
time, datetime2 and datetimeoffset
provide more...
Why is early return slower than else?
This is a follow-up question to an answer I gave a few days back . Edit: it seems that the OP of that question already used the code I posted to him to ask the same question , but I was unaware of it. Apologies. The answers provided are different though!
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