On 10/23/06, [EMAIL PROTECTED]
<[EMAIL PROTECTED]> wrote:
Hello Thomas.
> If you want alphabetic ordering, you should avoid symbol->string, because
> it copies the name of the symbol to a new string -- this is necessary as
> Scheme's strings are mutable objects!
With some exceptions, like ... symbol->string :-)
"It is an error to apply mutation procedures like string-set! to
strings returned by this procedure."
from
<www.schemers.org/Documents/Standards/R5RS/HTML/r5rs-Z-H-9.html#%_sec_6.3.3>
That it is an error does not prevent someone from creating havoc by
mutating interned symbol names. Therefore it is safer and standard
compliant to copy the string.
cheers,
felix
--
http://galinha.ucpel.tche.br:8081/blog/blog.ssp
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