How to sort two lists? Sort distance

[StephenG1CMZ]

Sorry...I am a novice with the the CAS functions.
This program won't compile - where am I going wrong?

Code:



 LOCAL l:={
  {1,"H","Hydro"},
  {2,"He","Heli"}}; 
 //LOCAL x,y;
 EXPORT ASORT()
 BEGIN
  //SORT()
  sort(l); //OK
  sort(l,(x,y)->string(x[3])<string(y[3]));
 
 END;