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Re: [Chicken-users] array-lib-hof - array-map! - not sure it's working
From: |
Kon Lovett |
Subject: |
Re: [Chicken-users] array-lib-hof - array-map! - not sure it's working |
Date: |
Sun, 9 Sep 2007 09:05:32 -0700 |
On Sep 8, 2007, at 2:49 PM, Terrence Brannon wrote:
(require-extension array-lib)
(require-extension array-lib-hof)
(define (quikary shape)
(let ([element-count (apply * shape)])
(apply array shape (iota element-count))))
(define h (quikary '(2 3)))
Quibble - 'shape' above isn't a "shape" but "dimensions"
; (array-map! h (lambda (z y x) "ho")) doesnt throw an arity
error. doesnt change h
The procedure is never called. You didn't provide any array(s) to
map. The signature & semantics are per the SLIB procedure of the same
name.
#;9> (array-map! h (lambda (z y x) "ho") h)
Error: bad argument count - received 1 but expected 3: #<procedure (?
z y x)>
Call history:
<syntax> (array-map! h (lambda (z y x) "ho") h)
<syntax> (lambda (z y x) "ho")
<syntax> (begin "ho")
<eval> (array-map! h (lambda (z y x) "ho") h) <--
; (array-map! h (lambda (z) "ho")) doesnt change contents
of h
; (array-index-map! h (lambda (y x) "ho")) changes contents of h
The procedure takes the indices, not the elements. Your array is rank
2, so your procedure has the correct number of parameters.
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