Check if variable is instance of ArrayList in SSJS?

Question

I have in a SSJS javascript a function that takes in a parameter. In the function I need to check what type of element the parameter is.

I can check for example if that type is an array:

if(false == values instanceof Array)

I notice that sometimes the incoming parameter is an ArrayList of strings. Is it possible to check against this type also in SSJS?

For now I just convert the object type before I send it to the function.

Did you try `instanceof ArrayList` or `instanceof List` ? It should work. — Knut Herrmann, Nov 15 '18 at 08:55
Script interpreter error, line=212, col=43: [ReferenceError] 'ArrayList' not found — Patrick Kwinten, Nov 15 '18 at 11:53
Script interpreter error, line=212, col=43: [ReferenceError] 'List' not found — Patrick Kwinten, Nov 15 '18 at 11:53

score 3 · Accepted Answer · answered Nov 15 '18 at 12:15

3

You can check with

values instanceof java.util.ArrayList

or with

values instanceof java.util.List

if you want to cover all sorts of Java Lists.

answered Nov 15 '18 at 12:15

Knut Herrmann

1

In SSJS you either need to do `importPackage` or use the full Java class name (`java.util.ArrayList` rather than just `ArrayList`). It's one of the key reasons for coding in Java vs SSJS, being able to incorporate standard Java code more easily. – Paul Stephen Withers Nov 15 '18 at 13:04

1 Answers1