Re: Copying a string

[uzibalqa <uzibalqa@proton.me>]

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------- Original Message -------
On Monday, July 31st, 2023 at 9:07 AM, uzibalqa <uzibalqa@proton.me> wrote:


> I see many ways to copy a string
> 
> (mutant (substring string))
> (mutant (copy-sequence string))
> 
> Any others ways ? And what should one use routinely ?

I am swapping characters, I can use as I am doing '(mutant string)'
or as before I had (mutant (copy-sequence string))

I do not think it makes a difference, and that using (copy-sequence string)
would be overkill. Right ? 

(defun swap-chars (string p q)
  "Swap characters at INDEX1 and INDEX2 in STRING."

  (let* ( (char1 (elt string p))
          (char2 (elt string q))
          (mutant string))

    (aset mutant p char2)
    (aset mutant q char1)

    mutant))