Logical Operator Clarification

[ailich]

Thanks for this awesome book. It's been my go to reference for all things Rcpp. One thing that I think that could be clarified though is the section on logical operators (chapter 11). Coming from an R background, I expected & and | to take and return logical values, but my code wasn't working. After a bit of digging, I learned it was because && and || are the logical operators in C++ while & and | are bitwise (1 is interpreted as TRUE and everything else is interpreted as FALSE).

Most people from an R background would probably be looking for the logical operators so a clarification and a table like this could be useful.

Operator	Symbol	Form	Operation
Logical NOT	!	!x	true if x is false, or false if x is true
Logical AND	&&	x && y	true if both x and y are true, false otherwise
Logical OR	||	x || y	true if either x or y are true, false otherwise

Logical Operators in C++ (Source: learnCpp.com)

[teuder]

Thanks, @ailich. Yea, that may be a confusing point. I would consider adding the explanation to the Chapter on the LogicalVector.

I really appreciate this kind of advice to make the book sensible for people who are not familiar with C++.