Maple 9 Learning Guide - Maplesoft

{1,2,3,a,b,c} intersect {0,1,y,a};2.5 Basic Types of Maple Objects • 25{1, a}The nops command counts the number of elements in a set or list.> nops(%);2For more details on the nops command, see 2.6 Expression Manipulation.Mapping A common and useful command, often used on sets, is map.Mapping applies a function simultaneously to all the elements of anystructure.> numbers := {0, Pi/3, Pi/2, Pi};numbers := {0, π, 1 3 π, 1 2 π}> map(g, numbers);{g(0), g(π), g( 1 3 π), g(1 2 π)}> map(sin, numbers);{0, 1, 1 2√3}Further examples demonstrating the use of map appear in 2.6 ExpressionManipulation and 6.3 Structural Manipulations.Operations on Sets and ListsThe member command verifies membership in sets and lists.> participants := [Kate, Tom, Steve];participants := [Kate, Tom, Steve]