Try reversing the order for arguments for both fp and f. /Jens Axel
Den tir. 14. dec. 2021 kl. 19.48 skrev Cyrille DEUSS < [email protected]>: > #lang racket > (require racket/format) > > (define pp_number > (lambda (n) > (~a n #:width 6 #:align 'right #:left-pad-string "0"))) > > (define fp > (lambda (s n) > (string-append (pp_number n) " + " s))) > > (define f > (lambda (s n) > (format "~a + ~a" n s))) > > (foldl f "" '(1 2 3)) > ; works great ! > > (foldl fp "" '(1 2 3)) > ; and why not this one ? > > Thanks in advance. > Cyrille > > -- > You received this message because you are subscribed to the Google Groups > "Racket Users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/racket-users/e72b954e-0b48-4830-b253-34b904d726bcn%40googlegroups.com > <https://groups.google.com/d/msgid/racket-users/e72b954e-0b48-4830-b253-34b904d726bcn%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- -- Jens Axel Søgaard -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/racket-users/CABefVgxN5%2B%2BSxfLganjeVB%3DpwuRXUEBEsbofoLh5asmcZ%2BWpBQ%40mail.gmail.com.
