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What are naming conventions for MongoDB?
Is there a set of preferred naming conventions for MongoDB entitites such as databases, collections, field names?
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What is a word boundary in regex?
I am using Java regexes in Java 1.6 (to parse numeric output, among other purposes) and cannot find a precise definition of \b ("word boundary"). I had assumed that -12 would be an "integer word" (matched by \b\-?\d+\b ) but it appears that this does not work. I'd be grateful to know of ways ...
What new capabilities do user-defined literals add to C++?
C++11 introduces user-defined literals which will allow the introduction of new literal syntax based on existing literals ( int , hex , string , float ) so that any type will be able to have a literal presentation.
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How do I replace NA values with zeros in an R dataframe?
I have a data frame and some columns have NA values.
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Visual Studio debugger - Displaying integer values in Hex
I'm using Visual Studio 2008 and I have just noticed that the debugger is displaying integer values as Hex when I hover over variables and also in the immediate window. I guess I must have hit a shortcut key accidently or something.
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How to randomize (or permute) a dataframe rowwise and columnwise?
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Database Structure for Tree Data Structure
What would be the best way to implement a customizable (meaning, a tree structure with an unknown number of level) tree data structure in a database?
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How to display an unordered list in two columns?
... the following HTML, what is the easiest method to display the list as two columns?
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Do the parentheses after the type name make a difference with new?
If 'Test' is an ordinary class, is there any difference between:
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