On Sat 13 Mar 2021 at 19:09, Alexander Burger <a...@software-lab.de> wrote: > On Sat, Mar 13, 2021 at 06:48:22PM +0100, Tomas Hlavaty wrote: >> (de <div> (Col . Prg) >> (prin "<div class=\"" Col "\">") >> (run Prg) >> (prin "</div>") ) >> >> prin has side-effect. > > Nonsense! 'prin' *is* the only and desired effect.
see https://en.wikipedia.org/wiki/Side_effect_(computer_science) for explanation what side-effect means >> Col is not properly escaped! > > How so? It generates > > <div class="red"> > > What kind if escape do you want? (<div> "\">") -> <div class="">"></div> which is invalid html. >> So will I see the generated html in stderr? > > Sigh! Please think a little. I said the output goes to the current stream and > debug info to stderr. Good old Unix style. Exactly, so debug info will not show me the generated html which means trace does not show me what I need. Trace is useful for pure functions. Trace is less useful for functions with side-effects because those side-effects are not captured by trace. -- UNSUBSCRIBE: mailto:picolisp@software-lab.de?subject=Unsubscribe
