Syntax
anArray[anIndex]
SemanticsThe operator [i] returns the i-th element of the array. The first element has the position 0. anIndex can be a static integer literal, an object of type Integer, or an action script language or expression returning an integer.
SubstitutablesanArrayCan be any variable or object attribute having the type Array
anIndexCan be any expression that evaluates to an integer.

It is not possible to use class operations as index function – only built-in action script language operations are allowed.

Examples
set arrayElement = inputContainer.myList[0];
set arrayElement = anArray[anArray.count() - 1].mySubList;
set arrayElement = anArray[indexVariable];
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