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Dealing with null values in #DBLookup

I have a domino view with an amount column but some values are empty...and need to be. The problem is that the #Sum works fine until I have an empty value then it stops summing.
eg: if the values are 5,5,"" and 5 I get a sum of 10 and not 15.
I've traced the problem to the #DbLookup which is that it stops building the return array when it encounters a blank value. There is no built in method of dealing with null values.
https://www.ibm.com/support/knowledgecenter/en/SSVRGU_9.0.1/reference/r_wpdr_atfunctions_dblookup_r.html
To make things harder, #dbLookup returns a string if only one is found or an array if more than one are found. If the values are 5,5,"" and 5 it returns an array of 2 values.
var alloc = #Sum(#DbLookup(#DbName(), "SubForms",MainFrmID , "ca_ca_ca_ca_amount"));
if (isNaN(alloc)){
return "$0.00";
}else{
return "$" + alloc.toFixed(2);
}
Can anyone help me refactor the #sum or #DbLookup to allow for empty values? Unfortunately I cannot define any new functions for this solution. The environment is locked down tightly. With a list of values of 5,5,"" and 5 I need a sum of 15.

I would try #Sum(#TextToNumber(#Trim(#Text(#DbLookup(...)))))

I would try
#Sum( #Transform( #Dblookup ( ....

If #DbLookup does not do what you need, you could always iterate over documents or view entries to build the sum.
The flow would be roughly like this:
1. Get a handle to the current database.
2. Get a handle to the "SubForms" view.
3a. Get a view entry collection using using getAllEntriesByKey() with MainFrmID as key, if a view column exists that displays the values you need.
--OR--
3b. Get a document collection using getAllDocumentsByKey() with MainFrmID as key, if no view column exists that displays the values you need.
4. Iterate over the collection to sum up values, using getColumnValues().get(columnNumber) to access the value from each view entry, or getItemValueDouble(fieldName) to access the value from each document.
That way you can easily detect null values and discard them.

Emitted Values Being Sent as One String Instead of Individual Values

In my Angular app I'm returning results via an API call, and allowing users to filter those results through a series of checkbox selections. Right now I'm running into an issue where, while results are returned as expected when one value is sent for a certain filter, when multiple values are selected (like filtering by more than one zipcode, for instance) I get zero results printed to the view. No errors, just no results.
After scratching my head for a while, using Chrome devtools network tab, I finally determined that the problem is that rather than wrapping each item in quotes in the payload - like this: "90001", "90002", what's being sent is this: "90001, 90002". In other words, quotes are wrapped around as if it were one value, not two.
This is the code, where I'm using a "join" to put together the values that are selected:
this.sendZipcode.emit(this.zipcodeFilters.text = arr.length === 0 ? undefined : arr.join(','));
I'm not sure how I can adjust the way this "join" is constructed, or find some other solution instead of "join", in order to have each item wrapped in quotes, rather than wrapped like one long string.
FYI, this is what I see in the network tab of Chrome devtools after selecting two zipcodes. As I explained, it's wrapped like one string, rather than as two values:
addresses.zipCode: {$in: ["90001, 90002"]}

Array.prototype.join will return a string. So you are converting your array to a single string which is being sent as a string. You want to send an array. Simply remove the join call and return arr directly.
String: "value, value"
Array: "value", "value"

How To Get javascript Array in Code behind

This is javascript array
var data =['athar','naveed','123','abx'];
Now I want to access this array in code behind array or list variable. Don't want to use Hidden field.

If you want to use in anyother javascript function,you can simply use data[0] to access first element i.e.,athar.
data.length will give you the count of values present in the array.

check if any column in JSON object is undefined/null/empty

I'm new, but did run a search that yielded no results on this topic. Is there any way to check a JSON object for blanks?
Like if(json[randomInt()].hasBlanks) or something to that effect? Or do I have to ask for each column manually?

There are no columns in JSON. It's a document format not a table format. That means that every entry ("row") in an array can have any fields. Field names in one array entry can be completely different from the previous or any other. So in that sense, no, such a function does not exist. You would have to write it yourself.

JavaScript array to ColdFusion

I have an array I've created in JavaScript. The end result comes out to element1,element2,,,element5,element6,,,element9.... etc
Once passed to ColdFusion, it removes the null elements, I end up with element1,element2,element5,element6,element9
I need to maintain these spaces, any ideas? My problem may begin before this, to explain in more detail...
I have a form with 13 elements that are acting as a search/filter type function. I want to "post" with AJAX, in essence, i'm using a button to call a jQuery function and want to pass the fields to a ColdFusion page, then have the results passed back. The JavaScript array may not even be my best option.
Any ideas?

Are you deserializing the jS array into a list? CF ignores empty list fields using its built-in functions. This can be worked around by processing the text directly. Someone has already done this for you, fortunately. There are several functions at cflib.org, like:
ListFix
ListLenIncNulls
etc, etc, etc.

In exchanging data between javascript and coldfusion have a look at using JSON.
http://www.json.org
http://www.epiphantastic.com/cfjson/

Instead of using the CF ListToArray function, use the Java String methods to split the string into an array. This will maintain the empty list items.
<cfset jsList = "item1,item2,,item4,item5,,item6">
<cfset jsArray = jsList.split(",")>
<cfdump var="#jsArray#">

you are using array in JavaScript,Fine. instead of assigning by default empty value,assign some dummy value. whenever you use this array value ignore dummy value using condition.