Index default value

RE: Index default value

Mike Schmitt — Thu, 05 Aug 2021 13:48:00 GMT

I've tested it a bit and it seems like it handles most corner cases well. I may have forgotten some of course.

RE: Index default value

Harshit Bumb (Appyzie) — Thu, 05 Aug 2021 06:12:01 GMT

Oh yes! How can I forget that 😛
But I wonder, does it checks for blank string and blank list too?

RE: Index default value

Mike Schmitt — Wed, 04 Aug 2021 13:40:07 GMT

[quote userid="32884" url="~/discussions/f/general/21483/index-default-value/84309#84309"]using an if condition[/quote]

And now in 21.2 they've made this even easier since we have a!defaultValue(), such things no longer need to be wrapped in an IF() statement.

RE: Index default value

ankitab254 — Wed, 04 Aug 2021 06:31:26 GMT

Thanks everyone for your inputs. i have tried a work around, where i am doing a null check for the index array, but I was just wondering index function itself does the null check and returns the default value, but it's not doing in this case.

RE: Index default value

Harshit Bumb (Appyzie) — Wed, 04 Aug 2021 06:03:45 GMT

Hi There,

In such cases, it is always best to add a null check.
E.g. Instead of retuning "Hello", please return a null and then in another variable, using an if condition, add a null check to return "hello" in case the indexed property is null or does not exists.

Also, please consider creating a custom nullCheck rule that treats null, empty string, and empty list as null.

RE: Index default value

Raghuvaran Nagarajan — Wed, 04 Aug 2021 01:13:30 GMT

Hi,

One of the weird behaviours of index(), When you pass empty array as index it returns all values in the array because it treats the index as a list of empty nested field names (text).

But if you pass empty integer array as index it returns empty.

wherecontains() has a return type as integer array even it's empty. so index will return empty.

please check this snippet below.

index({"A","B"},{},{"default"}) /*returns A,B */

index({"A","B"},tointeger({}),{"default"}) /*returns empty */

RE: Index default value

Selvakumar Kumarasamy — Thu, 22 Jul 2021 16:17:44 GMT

Hi ankitab254

The default value should be the same as that of the array elements as per the documentation.

docs.appian.com/.../fnc_array_index.html