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String + 1

2 posts · 3933 views

Ehsan

#1 Sat Jul 14, 2012 9:16 am

Hi everyone . i need to write a function in lisp that receive string and then add 1 to each characters. for example "2a6c12" and then return "3b7d23".

i write this function

(defun my-list(f)
(loop for x across f collect(code-char(+ 1 (char-code x)))))

but my output like this (#\3 #\b #\7 #\d #\2 #\3) . how can i change this output to normal form ("3b7d23")

tnx a lot

Goheeca

#2 Sat Jul 14, 2012 9:52 am

Re: String + 1

Try this:

(concatenate 'string '(#\a #\b))

or ugglier:

(coerce '(#\a #\b) 'string)

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