[rules-users] How to count distinct?

[Yaniv Itzhaki]

Hi All,

I need to go over a not distinct list and count distinct each element in the
list.

for example:

Object XXX {
     int id;
     String type;
}

XXX:
id type
1    A
2    B
3    A
4    C
5    C

The rule should be activated per type and give as a result the count of each
type:
A 2
B 1
C 2

Thanks
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