[XSL-LIST Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] RE: XPath / XSLT 2.1 - Rounding algorithms
Hi Michael, > > round(3.065) returns 3. , whereas my need is for a function > to return > > 3.07 (say), something like this, say: > > > > round-half-up(3.065,2) -> 3.07 > > round-half-up(-3.065,2) -> -3.07 > > You can always multiply by a hundred, round(), and then > divide by a hundred. Thanks for the algorithm, I'll try it out. > I know it's tedious but there was a lot of feeling in the WG > that we should have a library of a hundred functions rather > than a thousand, if we were to have a reasonable prospect of > making the spec implementable (not to mention the task of > actually writing it and publishing it). The round-half-to-even() function _is_ available, yet it's only part of the standard, so it's an odd place to draw the line. I understand the hesitation to increase the burden of implementation, especially for open-source implementation providers. Not being an implementer, it's easy to talk, you might say. But I also think that should be balanced against the barriers to entry on the part of potential XSLT programmers. Having to understand extension functions and the limitations of what can be achieved directly in XSLT / XPath takes time and raises the bar for potential users. A certain 'core' set of math functions for XPath could be an important addition - there are lots of mathematical uses for XSLT and XQuery. Having the ability to create one's own XPath functions was a fabulous addition, but it doesn't apply across languages dependant on XPath, the functions must be re-written in each language. But here I'm just talking about one function, and as far as I know it's not in either the EXSLT math library or Dimitre's FXSL library. Cheers, Peter
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