loop through

loop through vt.  To process each element of a list of
   things.  "Hold on, I've got to loop through my paper mail."
   Derives from the computer-language notion of an iterative loop;
   compare `cdr down' (under {cdr}), which is less common among C
   and UNIX programmers.  ITS hackers used to say `IRP over' after
   an obscure pseudo-op in the MIDAS PDP-10 assembler (the same IRP op
   can nowadays be found in Microsoft's assembler).