Subject: Variables and constants From: John Lam <jlam@xxxxxxxxxxxx> Date: Fri, 25 Feb 2000 08:16:45 -0500 |
This is more of a philosophical question. Since I haven't worked with functional programming languages before, can anyone explain to me the rationale for not having true variables a'la procedural programming languages (i.e. you can re-assign the value of an existing variable)? Clearly this was an intentional design decision, but it makes it impossible to do any kind of simplistic calculation (e.g. totalling a shopping cart that has price and quantity information for each item) without resorting to recursion. I feel that a lot of folks who will wind up using XSLT (client-side DHTML developers in particular) will want to do things like render a shopping cart for display *and* total the items in the shopping cart without having to do the rendering transform using XSLT and the totalling action by writing JavaScript code to walk the DOM. Can anyone shed any light on why variables == constants in XSLT? Cheers, -John XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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