Friday, April 17, 2009

STL vector, according to Stanford lecture

In c++, technically vector can (though occasionally not recommended) replace arrays in all cases except...? That's actually a question (Q1)

* if a func param is an array i.e. a pointer to the element type. [[effective stl]] Item 16 comes to the rescue.
* (not for vector) if you need thread safety but your string implementation uses ref counting

The Stanford lecturer Julie Zelenski suggests the answer to Q1 is "nothing". She did point out

+ vector offers bound checking.
- Every insert and remove must copy/relocate elements "on the right", to keep memory contiguous.

[[effective stl]] also covers this topic.

However, we still must master C arrays, as they are widely used in production c++ code, not to mention C.

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