Stop show with sound -- Keyboard shortcut: 'x'  Next slide in show -- Keyboard shortcut: 'n'  44 secondsHigher-order Functions - slide 16 : 34

The reduction functions

The function reduce-right is a straightforward recursive function

The function reduce-left is a straightforward iterative function

reduction.scm
The function reduce-right.
reduction.scm
The function reduce-left.
Expression

 Value

(reduce-left - '(1 2 3 4 5))
 
-13
(reduce-right - '(1 2 3 4 5))
 
3
(reduce-left string-append (list "The" " " "End"))
 
"The End"
(reduce-left append 
  (list (list 1 2 3) (list 'a 'b 'c)))
 
(1 2 3 a b c)
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Quantifier Functions