I think the api implies they all work and will have differing
outcomes depending on what you would like to 'sum' or 'count'
etc. e.g., Consider the keypath:
'company.people.accounts.totalLiability'.
You can think of the keypath as a tokenized string that is
evaluated recursively through the elements toward the end of the
string and the @operators are looking for scalar values to iterate
over and accumulate. So, for company.people.account.totalLiability
where people is the only array, then
email@hiddenLiability would produce the sum as
desired. Suppose, however, that each person had multiple
accounts. The following would also be valid:
email@hiddenemail@hiddenLiability.
The point of this was to not leave the thread with the idea that
there can only be one @operator in a keypath.
This is the kind of thing that WOBuilder provided without thought ;-)
I was sure it was possible but had a mental blank. Thanks.
