Lists of records
julian@REDACTED
julian@REDACTED
Mon Jul 16 06:04:46 CEST 2001
Hi All,
I'm new to Erlang, and I'm still trying to get familiar with lists and
records.
I have a (small) list containing records (all of the same type) and I'm
trying to write a function to return a record when supplied with a field
name and value.
I'm happy to assume the field name chosen happens to contain unique values
for now.
I've tried a few things, including the idea below.. but I'm not having much
luck.
Is there a way to do something like this without hardcoding the Fieldname?
Are there any other docs and/or examples on the subject of records apart
from the "Erlang Extensions Since 4.4" doc?
find_record(Fieldname,Searchvalue,[H|T]) ->
case H of
#recordtype1{Fieldname=Searchvalue} ->
H;
_ ->
find_record(Fieldname,Searchvalue,T)
end;
find_record(Fieldname,Searchvalue,[]) ->
not_found.
The above seems to compile & work only if Fieldname is replaced with an
atom.
I had also hoped to extend this so that the recordtype isn't hardcoded.. any
ideas?
Thanks & Regards,
Julian Noble
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