coalesce

coalesce(value1, value2, ...) → value · Type

Returns the first non-null argument. Accepts any number of arguments.

value1, value2, ... (variadic): values to check in order

bash

echo '{"nickname": null, "displayName": null, "fullName": "Alice Johnson"}' \
  | utlx -e 'coalesce($input.nickname, $input.displayName, $input.fullName, "Anonymous")'
# "Alice Johnson"

utlx

{
  name: coalesce($input.nickname, $input.displayName, $input.fullName, "Anonymous")
}

Note: for two values, the ?? operator is cleaner: $input.name ?? "Unknown" (see Chapter 9).

coalesce ​

coalesce