Initializing an Empty List

Hello,

With the actual version of NQE not providing direct way to initialise an Empty list 

ex:

let empty_list = ]

or

empty_list = ]

A workaround for this is to construct the creation of that list and providing a value with the same data type you need

// an empty List<String>
FALLBACK =
foreach x in n""]
where x != ""
select x;

// an empty list of Numbers
FALLBACK_NUMBERS=
foreach x in i0]
where x != 0
select x;

Taking this logic further we can create a function that provides us an empty list of whatever generic type. by taking a default value of that type as an input, then comparing against that value

The below block contains the full PoC code

// an empty List<String>
FALLBACK =
foreach x in  ""]
where x != ""
select x;

// an empty list of Numbers
FALLBACK_NUMBERS=
foreach x in  0]
where x != 0
select x;

// An empty list of a generic type T
emptyListT(default_val)=
foreach x in  default_val]
where x != default_val
select x;

foreach a in  ""]
let empty_list_of_strings = FALLBACK
let empty_list_of_numbers = FALLBACK_NUMBERS

// this provides a List<IpAddress>
let empty_list_of_ips = emptyListT(ipAddress("127.0.0.1"))

foreach ip in empty_list_of_ips
select {ip}

Finally, Thanks to @cariddir for encouraging me to start publishing :)