Begin forwarded message: > From: Jean-Marie Gaillourdet <j...@gaillourdet.net> > Subject: Re: [Haskell] ANN: global-variables-1.0 > Date: 12. Oktober 2011 20:27:16 MESZ > To: Henning Thielemann <lemm...@henning-thielemann.de> > > Hi, > > On 12.10.2011, at 20:20, Henning Thielemann wrote: > >> >> On Wed, 12 Oct 2011, Jean-Marie Gaillourdet wrote: >> >>> * Simplify the "configuration problem" - at least for code in the >>> IO monad. >>> >>> Note, that this library does not encourage sloppy software design by >>> re-introducing all bad effects of global variables. >> >> But isn't this kind of solution for the "configuration problem" an example >> for sloppy software design? If a global configuration would be passed >> around, then you could easily use the program functions with different >> configurations simultaneously. In contrast to that, with the global IORef >> this is not possible. > > Well, the question whether using a carefully documented set of global > configuration variables which, e.g. only affect the verbosity of logging, is > sloppy or not is a question I don't want to answer. But I am convinced there > are good reasons to use global-variables *sometimes*. If only for a temporary > debugging aid. In any case, an additional possibility to express design > intents never hurts. > > Note, that I wrote "simplify" not solve "the configuration problem" :-) > > Cheers, > Jean
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