FilteredDAO can hook up more than one DAO event relay

[adamvy-google]

Consider this code

foam.CLASS({
  name: 'Data',
  properties: [
    'id',
    'name'
  ]
});

var E = foam.mlang.ExpressionsSingleton.create();

var dao = foam.dao.EasyDAO.create({
  of: 'Data',
  daoType: 'MDAO',
  seqNo: true
});

var filtered = dao.where(E.EQ(Data.NAME, "hello"));

filtered.on.put.sub(function(s, on, put, obj) {
  console.log("First listener: ", obj.id);
});

filtered.on.put.sub(function(s, on, put, obj) {
  console.log("Second listener:", obj.id);
});

dao.put(Data.create({ name: 'hello' }));

Each listener will actually be called twice. The output will be:

Second listener: 1
First listener:  1
Second listener: 1
First listener:  1

[adamvy-google]

@kgrgreer