youngnh

public class Next<A, B, C> extends Task<A, C> {

  private Task<A, B> task;
	private Task<B, C> nextTask;

	public Next(Task<A, B> task, Task<B, C> nextTask) {
		this.task = task;
		this.nextTask = nextTask;
	}

youngnh

(define tolerance 0.00001)

(define (fixed-point f first-guess)
  (define (close-enough? v1 v2)
    (< (abs (- v1 v2)) tolerance))
  (define (try guess)
    (let ((next (f guess)))
      (if (close-enough? guess next)
        next