source files: x01v.[ch] xflv.[ch] x32v.[ch] xcsy.[ch] xgrl.[ch]
SYNTAX
(SEND <ary> :POSITION <value>)
DESCRIPTION
Returns the row-major index of the given <value>
within the given <ary>, if present, else NIL.
May be used, for example, to find the slot containing
the minimum value in the array, by first using the
:min message to find the minimum value, then
the :position message to find its index.