prepend_item(arr: array, val: storable) -> generic array

Returns an array containing all elements from the source array as well as the new element.

The new element is located at the beginning of the array.

Domain

This is a scalar function (calculates a single output value for a single input row).

Categories

• Semistructured

Examples

make_col foo:make_array(1,2,3)
make_col bar:prepend_item(foo, 0)
// [0,1,2,3]

Prepend integer 0 at the beginning of array-type column foo. The resulting array is stored in bar.