22 lines
		
	
	
		
			483 B
		
	
	
	
		
			Scheme
		
	
	
	
			
		
		
	
	
			22 lines
		
	
	
		
			483 B
		
	
	
	
		
			Scheme
		
	
	
	
| (import (scheme base)
 | |
|         (picrin control list)
 | |
|         (picrin test))
 | |
| 
 | |
| (test '(1 2 3)
 | |
|       (for
 | |
|        (yield (in '(1 2 3)))))
 | |
| 
 | |
| (test '((1 a) (1 b) (1 c) (2 a) (2 b) (2 c) (3 a) (3 b) (3 c))
 | |
|       (for
 | |
|        (let ((n (in '(1 2 3)))
 | |
|              (c (in '(a b c))))
 | |
|          (yield (list n c)))))
 | |
| 
 | |
| (test '((2 a) (2 b) (2 c))
 | |
|       (for
 | |
|        (let ((n (in '(1 2 3)))
 | |
|              (c (in '(a b c))))
 | |
|          (if (even? n)
 | |
|              (yield (list n c))
 | |
|              (null)))))
 |