How to filter an array_agg value?

[mhkeller]

I'm trying to filter the results of an array_agg operation. Is there a way to do this without doing a second .derive with an aq.escape?

Here's an example notebook

const t = aq.table({
  group:  ["a", "a", "a", "b", "b", "b", "b", "b", "c", "c", ],
  answer: ["n", "y", "y", "y", "n", "n", "n", "y", "y", "n"]
})

t.groupby('group')
  .orderby('answer')
  .derive({
    answers: d => op.array_agg_distinct(d.answer)
  })
  .unorder()
  .derive({
    // Is there a better way than this?
    answers: aq.escape(d => d.answers.filter(q => q !== 'y'))
  })
  .view()