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In C#, what happens when you call an extension method on a null object?
Does the method get called with a null value or does it give a null reference exception?
7 Answers
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Why does Math.Round(2.5) return 2 instead of 3?
In C#, the result of Math.Round(2.5) is 2.
15 Answers
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Python loop that also accesses previous and next values
How can I iterate over a list of objects, accessing the previous, current, and next items? Like this C/C++ code, in Python?
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What is the difference between ArrayList.clear() and ArrayList.removeAll()?
...; arraylist , is arraylist.removeAll(arraylist) equivalent to arraylist.clear() ?
9 Answers
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How to install node.js as windows service?
I have downloaded node.js executable. How can I run that executable as windows service?
I cannot use standard node.js installer, since I need to run multiple version of node.js concurrently.
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Replacement for “rename” in dplyr
I like plyr's renaming function rename . I have recently started using dplyr, and was wondering if there is an easy way to rename variables using a function from dplyr, that is as easy to use as to plyr's rename ?
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LINQ Select Distinct with Anonymous Types
So I have a collection of objects. The exact type isn't important. From it I want to extract all the unique pairs of a pair of particular properties, thusly:
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How can I read a function's signature including default argument values?
Given a function object, how can I get its signature? For example, for:
8 Answers
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Is there a documented way to set the iPhone orientation?
I have an app where I would like to support device rotation in certain views but other don't particularly make sense in Landscape mode, so as I swapping the views out I would like to force the rotation to be set to portrait.
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Selecting/excluding sets of columns in pandas [duplicate]
I would like to create views or dataframes from an existing dataframe based on column selections.
9 Answers
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