loop through

from Jargon File (4.4.4, 14 Aug 2003)

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).

from The Free On-line Dictionary of Computing (8 July 2008)

loop through

   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.

   [{Jargon File}]

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