countBy

countBy(array, predicate) → number · Array

Count elements in an array that match a predicate.

• array (required): the array to count

• predicate (required): lambda (element) -> boolean

echo '{"orders": [{"status": "ACTIVE"}, {"status": "CLOSED"}, {"status": "ACTIVE"}]}' \
  | utlx -e 'countBy($input.orders, (o) -> o.status == "ACTIVE")'
# 2

let active = filter($input.orders, (o) -> o.status == "ACTIVE")
{
  activeCount: count(active),
  closedCount: countBy($input.orders, (o) -> o.status == "CLOSED"),
  activeNames: map(active, (o) -> o.name)
}