(examples-for mapreduce
("maps a function over a list and sums the result" (mapreduce car + '((2 3) (5 7) (11 13)) 0) 18) ("extracts an attribute and sums the result" (mapreduce &age + (list { name "a" age 10 } { name "b" age 7 } { name "c" age 12 }) 0) 29))