String + 1

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Posts: 8
Joined: Thu Jul 12, 2012 7:39 am

String + 1

Post by Ehsan » Sat Jul 14, 2012 2:16 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

Posts: 271
Joined: Thu May 10, 2012 12:54 pm

Re: String + 1

Post by Goheeca » Sat Jul 14, 2012 2:52 am

Try this:

Code: Select all

(concatenate 'string '(#\a #\b))
or ugglier:

Code: Select all

(coerce '(#\a #\b) 'string)
cl-2dsyntax is my attempt to create a Python-like reader. My mirror of CLHS (and the dark themed version). Temporary mirrors of aferomentioned: CLHS and a dark version.

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