xxxInPlace or xxxCopy?

[so]

> And honestly, from the standpoint of code simplicity and  
> understandability,
> there's a lot to be said for making copies being the default rather than
> mutation. You can then use the InPlace versions if you need the boost in
> efficiency.
>
> - Jonathan M Davis

Isn't simplicity and understandability favors the in-place style on these  
type of algorithms?
As Jesse Phillips said, it is same as sort.