[XSL-LIST Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Re: "if-condition-return something" idiom : is it pos
On Mon, Jun 16, 2014 at 9:12 PM, Liam R E Quin liam@xxxxxx < xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote: > On Mon, 2014-06-16 at 13:00 +0000, Kerry, Richard richard.kerry@xxxxxxxx > wrote: > > I tend to view (*) xsl:choose as similar to C's "switch", which needs > > to do a single calculation to work out which branch to run. > > (*) I may well be wrong in this..... > > xsl:choose is like a sequence of C if statements in practice, and is > what yu want for your C++-like example. > > But I think it better to think of xsl:choose in the mathematical sense, > e.g. > > A := f(x) > 0 when x <= 1 > 17 when x <= 7 > A(x - 1) . A(x - 2) when x^2 + 1 is prime > 31x / 7 otherwise > > That is, I prefer to think of XSLT as a functional language in which one > is describing the end result rather than as a procedural language with > loops and returns. > > There's no concept of an "early return" from a mathematical function, > nor from an XSLT one. > > but the value of f(x) above depends on the order in which the sub-clauses are evaluated. Is that permissible in a mathematical function?
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