Has anyone a string comparison program that can be told to use
the N'th field with fields defined by some user-specified character,
e.g. space or tab.
It would be nice to have such a thing partly in order to generalise
ved_smr (Sort Marked Range).
I have a first draft implementation, allowing things like
ENTER smrn 3
Sort marked range using third space-delimited field
ENTER smrn -f 2
Sort marked range using second field and fold upper into
lower case.
Mine's a quick hack. If someone else has a good implementation of this
sort of thing I'd be interested to see it. I'll post mine if there isn't
already something better.
Aaron
PS
For the comparison, I've used a procedure defined thus
field_before(s1, s2, startloc, endloc, fold) -> boolean
s1 and s2 are strings, startloc and endloc are procedures.
fold is a boolean to control mapping of upper to lower case
If string s1 is alphabetically earlier than s2 with the
comparison starting at a locations startloc(s1) and startloc(s2),
and ending at locations defined by
endloc(s1, startloc(s1))
endloc(s2, startloc(s2))
then return true, otherwise false.
Aaron
|