CODE EXAMPLE FOR DART

get second to last item in a list dart

var list = ['a', 'b', 'c', 'd'];
//index of last two element
final indexOfsecondToLast = list.length - 2; 

//index of last element
final indexOfLast = list.length - 1; 

//last element in array
final LastElement = list.elementAt(list.length - 1);

//last two element in an array
final secondToLastElement = list.elementAt(list.length - 2);