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What does .SD stand for in data.table in R
...ly know what I am doing with it. What does it stand for? Why is there a preceding period (full stop). What is happening when I use it?
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Does order of where clauses matter in SQL?
Let's say I have a table called PEOPLE having 3 columns ID, LastName, FirstName , none of these columns are indexed.
LastName is more unique, and FirstName is less unique.
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What is the meaning of the prefix N in T-SQL statements and when should I use it?
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C# HttpWebRequest vs WebRequest
I saw this piece of code:
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How to create a css rule for all elements except one class?
I have created a CSS stylesheet for my project. Is there any way I can create a css rule that applies to all table elements EXCEPT table elements belonging to the class "dojoxGrid"? Something like:
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Export a graph to .eps file with R
How do I export a graph to an .eps format file? I typically export my graphs to a .pdf file (using the 'pdf' function), and it works quite well. However, now I have to export to .eps files.
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How does “make” app know default target to build if no target is specified?
Most linux apps are compiled with:
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Rails params explained?
Could anyone explain params in Rails controller: where they come from, and what they are referencing?
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Can anyone explain python's relative imports?
I can't for the life of me get python's relative imports to work. I have created a simple example of where it does not function:
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How to print full stack trace in exception?
For example, in one place...
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