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).
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