array.containsNoCase()
Returns the position of the first element in the array whose string value contains the substring passed (not case sensitive), or 0 if no such element is found.
array.containsNoCase( needle=object, substringMatch=boolean )
Returns: Number
Examples
fruits = ["apple","orange","BANANA","banana","orange","Banana","orange"];
writeDump(fruits.containsnocase("banana"));