
> Does anyone know if ETS can support pattern matching on "the > rest of a list of terms" if the key is a list of terms?
Yes, it does in the cases you describe.
> Examples:
>
> Given keys:
>
> [a,b,c,d]
> [a,b,c]
> [a,b]
Eshell V5.2 (abort with ^G)
1> T=ets:new(my_table,[]).
11
2> ets:insert(T,[{[a,b,c,d],1},{[a,b,c],2},{[a,b],3}]).
true
> Find all three with the following pattern:
>
> [a,'*']
3> ets:match(T,{[a'$1'],'$2'}).
[[[b,c,d],1],[[b],3],[[b,c],2]]
> Find the last two with this pattern:
>
> [a,b,'*']
If '*' means zero or more elements, it would match all keys:
4> ets:match(T,{[a,b'$1'],'$2'}).
[[[c,d],1],[[],3],[[c],2]]
If it matches one or more elements, I have to add another element:
5> ets:match(T,{[a,b,'$3''$1'],'$2'}).
[[[d],1,c],[[],2,c]]
> Find [a,b] with this pattern:
>
> ['_',b]
6> ets:match(T,{['$1',b],'$2'}).
[[a,3]]
It seems to work fine.
Regards,
*Erik.
