How to check a string existing in a list of strings

Question

Hi,
I have a code like below where I am getting a list of text strings into a local!leadIDs. When I try to use contains() function to check whether a specified string exists, then I am getting an error like 
Expression evaluation error at function 'contains' [line 11]: Invalid types, can only act on data of the same type (Any Type, Text)
Can someone advise, how to fix this.

a!localVariables( local!leadIDs: index( rule!getLeads(key: null()), "id", null()), contains(local!leadIDs, "AB12345"))
Expression evaluation error at function 'contains' [line 11]: Invalid types, can only act on data of the same type (Any Type, Text)

mikes0011 · Accepted Answer

contains() is finnicky about data types - you should try the following:

contains(
  touniformstring(local!leadIds),
  "ABCDEFG"  /* etc */
)

This will force-cast "local!leadIDs" to "array of string" type instead of "array of any type", and will not trip up contains().

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