Hi, I’m new to specter and have a select I keep trying to do but I’m not quite sure how. I have data like this:

{:foo [{:data "text" :required true}]
 :bar [{:data "text"}]
 :baz [{:data "text" :required true}]}

(map first (s/select [s/ALL (fn[[k,v]] (:required (first v)))] data))

(:foo :baz)

@slpssm can those inner vectors have multiple elements?

if so then it's (select [ALL (selected? LAST ALL (must :required)) FIRST] data)

otherwise it's (select [ALL (selected? LAST FIRST (must :required)) FIRST] data) to match your code

this code just checks for existence of a :required key, if you need to match only when :required is truthy replace (must :required) with :required identity

I think it can have more than one item, but I’ve never seen one so I’m going with the first version. 🙂 With a note on the second version just in case. Now I just need to parse this so I know how it works.

selected? is a filter based on whether the subpath selects at least a single value

LAST gets you into the array, the next ALL looks at key/values, (must :required) does the :required check and the last FIRST is the outer key. About right?

the initial LAST goes to the value for that key/value pair, the subsequent ALL looks at all maps inside that vector

Ah, OK. Yes. FIRST would be the key, LAST is the value.