Subject: Re: Assignment no, dynamic scoping si (was: Re: [xsl] RE: Wishes for XSL revisions ... From: Joerg Pietschmann <joerg.pietschmann@xxxxxx> Date: Thu, 03 Jan 2002 16:50:54 +0100 |
Gunther Schadow <gunther@xxxxxxxxxxxxxxxxxxxxxx> wrote: > So, what are the disadvantages of dynamic scoping? Well, every LISP book i read warns that excessive use of floating variables and reliance on dynamic binding will lead to hard to find bugs. That's exactly what i experienced: hours of hunting down hard to find bugs originating for example in using a variable name in a lambda expression fed to someone else's code where it was used dynamically bound. Apart from this, language developers went to static scoping because this makes compilation and many optimisation techniques easier or even possible. I don't think the advantages of dynamic scoped variables are worth the potential trouble. The worst i would have avoided was writing some moded templates to pass down parameters to the place where they were needed. Regards J.Pietschmann XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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