FIRST() function (SB4)

SB4 adds the convenient LAST(ARY) function, which returns the last index in the array/string (LEN(ARY)-1):

FOR I=0 TO LEN(ARY)-1 'old
FOR I=0 TO LAST(ARY) 'new

However, they have neglected to include a FIRST function, to find the first index in the array. I'm sure FIRST will be added soon in an update, but until then, here is a user defined function you can use:

DEF FIRST(ARY)
 RETURN LAST(ARY)-LEN(ARY)+1
END

Example usage:

FOR I=FIRST(ARY) TO LAST(ARY)
 PRINT ARY[I]
NEXT