List Functions

Name(parameters)	Parameter Domain	Description	Example
list contains(list, element)	list, any element of the semantic domain including null	does the list contain the element?	list contains([1,2,3], 2) = true
count(list)	list	return size of list	count([1,2,3]) = 3
minimum(list)	(list of) comparable items	return minimum item	minimum([1,2,3]) = 1
maximum(list)	(list of) comparable items	return maximum item	maximum([1,2,3]) = 3
sum(list)	(list of) numbers	return sum of numbers	sum([1,2,3]) = 6
mean(list)	(list of) numbers	return arithmetic mean (average) of numbers	mean([1,2,3]) = 2
sublist(list, start position, length?)	list, number1, number2	return list of length (or all) elements of list, starting with list[start position]. 1st position is 1, last position is -1	sublist([1,2,3], 1, 2) = [2]
append(list, item…)	list, any element including null	return new list with items appended	append([1], 2, 3) = [1,2,3]
concatenate(list…)	list	return new list that is a concatenation of the arguments	concatenate([1,2],[3]) = [1,2,3]
insert before(list, position, newItem)	list, number1, any element including null	return new list with newItem inserted at position	insert before([1,3],1,2) = [1,2,3]
remove(list, position)	list, number1	list with item at position removed	remove([1,2,3], 2) = [1,3]
reverse(list)	list	reverse the list	reverse([1,2,3]) = [3,2,1]
index of(list, match)	list, any element including null	return ascending list of list positions containing match	index of([1,2,3,2],2) = [2,4]
union(list…)	list	concatenate with duplicate removal	union([1,2],[2,3]) = [1,2,3]
distinct values(list)	list	duplicate removal	distinct values([1,2,3,2,1]) = [1,2,3]
flatten(list)	list	flatten nested lists	flatten([[1,2],[[3]], 4]) = [1,2,3,4]