chunkBy

chunkBy(array, predicate) → array of arrays · Array

Split a flat sequence into chunks. A new chunk starts whenever the predicate returns true.

• array (required): the array to split

• predicate (required): lambda (element) -> boolean — true starts a new chunk

echo '{"items": [1, 2, 10, 11, 12, 20, 21]}' \
  | utlx -e 'chunkBy($input.items, (x) -> x >= 10 and x % 10 == 0)'
# [[1, 2], [10, 11, 12], [20, 21]]

// See Chapter 20 for data restructuring patterns.
{
  groups: chunkBy($input.records, (r) -> r.isHeader)
}