CALL SCAN

[PurushReddy]

Hi,
Can anyone give bref about CALL SCAN function

[Kurt_Bremser]

CALL SCAN Routine 

[s_lassen]

CLL SCAN is probably the routine that gets called from the SCAN function. It can be useful to call explicitly when

1. You are scanning all the words in a list e.g.
   

   do i=1 to countw(string);
     w=scan(string,i);

2. The list (the STRING variable in the example above) is long and performance is important. You can then change the code to something like
   

   Pos=1;
   len=0;
   do while(1);
     call scan(String,1,Pos,len);
     if pos=0 then leave;
     w=substr(String,Pos,len);
     pos=pos+len;

The code is a bit more complicated, so it is only something you should use when performance really matters.