insertBefore

insertBefore(array, index, element) → array · Array

Insert an element before the specified index in an array.

• array (required): source array

• index (required): position before which to insert

• element (required): element to insert

echo '{"items": ["a", "c", "d"]}' | utlx -e 'insertBefore($input.items, 1, "b")'
# ["a", "b", "c", "d"]

{
  updated: insertBefore($input.items, 0, "first")
}