How to cleanup array of structs?

[Suliman via Digitalmars-d-learn]

I remember that there was topic about remobing data from 
struct/arrays of structs. But I do not remember what is idiomatic 
way to do it, and can't google it.

something like:
     struct MyTrack
     {
         ulong id;
         string recordDate;
         int velocity;
         int maxAllowedSpeedForRoad;
     }

     MyTrack mytrack;
     MyTrack [] mytracks;

// filling

mytracks.clean() or what?