Subject: Re: [xsl] Function that reduces the number of digits to the right of the decimal point? From: "David Carlisle d.p.carlisle@xxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> Date: Tue, 23 Jun 2020 14:49:42 -0000 |
https://www.w3.org/TR/xpath-functions/#func-round ? David On Tue, 23 Jun 2020 at 15:28, Roger L Costello costello@xxxxxxxxx < xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx> wrote: > Hi Folks, > > $num is a variable holding a decimal value. > > $desired-number-of-digits-after-decimal-point is a variable holding an > integer value. > > I want a function that reduces the number of digits to the right of the > decimal point in $num according to the value specified in > $desired-number-of-digits-after-decimal-point > > Example #1: > $num = 42.366978 > $desired-number-of-digits-after-decimal-point = 2 > The result of applying the function is: 42.36 > > Example #2: > $num = 42.366978 > $desired-number-of-digits-after-decimal-point = 0 > The result of applying the function is: 42 > > Below is one way to implement the function. Is there a better way? By > "better" I mean simpler, more correct. > > Also, is there a better name for the function? By "better" I mean > shorter, more standardized. /Roger > ----------------------------------------------------- > <xsl:function name="f:reduce-number-of-digits-after-decimal-point" > as="xs:string"> > <xsl:param name="num" as="xs:string" /> > <xsl:param name="desired-number-of-digits-after-decimal-point" > as="xs:integer" /> > > <xsl:variable name="whole-part" select="substring-before($num, '.')"/> > <xsl:variable name="fraction-part" select="substring-after($num, > '.')"/> > <xsl:variable name="reduced-fraction-part" > select="substring($fraction-part, 1, > $desired-number-of-digits-after-decimal-point)"/> > <xsl:choose> > <xsl:when test="$desired-number-of-digits-after-decimal-point gt > 0"> > <xsl:value-of select="concat($whole-part, '.', > $reduced-fraction-part)"/> > </xsl:when> > <xsl:otherwise> > <xsl:value-of select="$whole-part"/> > </xsl:otherwise> > </xsl:choose> > </xsl:function>
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