Re^4: Multi-core and the future

Consider multiplication. @a ť*Ť @b is explicitly element-wise looping over the operator. @a * @b is not built-in, and could be defined, for example, between two Matrix objects if you like, to do matrix multiplication. You could also define infix:<+> between two lists to simply call the hyperoperator. Also, the syntax generalizes more than the implicit way of Fortran: apply a method call to each element, rather than to the container itself.

Comment on Re^4: Multi-core and the future

Replies are listed 'Best First'.

Re^5: Multi-core and the future
by swampyankee (Parson) on Sep 01, 2008 at 19:24 UTC

Usually (F90 permits overloading), F90's array operations apply the same operation to each element of an array, and cannot process arrays which aren't conformal (same organization), so F90's array operation A = B * C would be the equivalent to

real,dimension(2,3,4) :: A, B, C
integer j, k, m

do j = 1, 2
  do k = 1, 3
     do m = 1, 4

         A(j,k,m) = B(j,k,m) * C(j,k,m)
     
     enddo
  enddo
enddo
[download]

Of course, Fortran programmers like typing no more than any other type of programmer¹, so A = B * C would be preferred ;-).

visible

¹ Well, maybe COBOL programmers like typing, but I wouldn't want to stereotype them.

Information about American English usage here and here. Floating point issues? Please read this before posting. — emc

[reply]
[d/l]


Think about Loose Coupling
	PerlMonks