barcode generator github c# NAMED TEMPLATES, STYLESHEET FUNCTIONS, AND RECURSION in Font

Creation PDF 417 in Font NAMED TEMPLATES, STYLESHEET FUNCTIONS, AND RECURSION

CHAPTER 11 NAMED TEMPLATES, STYLESHEET FUNCTIONS, AND RECURSION
Generating PDF417 In None
Using Barcode creator for Font Control to generate, create PDF417 image in Font applications.
www.OnBarcode.com
Draw UCC.EAN - 128 In None
Using Barcode creator for Font Control to generate, create GTIN - 128 image in Font applications.
www.OnBarcode.com
<xsl:function name="str:characters" as="xs:string*"> <xsl:param name="string" as="xs:string" /> <xsl:if test="$string"> <xsl:sequence select="substring($string, 1, 1)" /> <xsl:variable name="remainder" select="substring($string, 2)" as="xs:string" /> <xsl:if test="$remainder"> <xsl:sequence select="str:characters($remainder)" /> </xsl:if> </xsl:if> </xsl:function> Don t forget to declare the str prefix; I ve used the namespace http://www.example.com/string for it, though it doesn t really matter what you use. You should also make sure that namespace doesn t appear in the output by including the str prefix in the exclude-result-prefixes attribute on the <xsl:stylesheet> element. In the template matching the <TVGuide> element, we ll store the sequence of characters that results from calling this template on the $alphabet stylesheet parameter in a local $alphabet variable: <xsl:template match="TVGuide"> ... <h2>Series</h2> <xsl:variable name="alphabet" as="xs:string+" select="str:characters($alphabet)" /> ... </xsl:template> And the <TVGuide> element itself, which we ll otherwise lose track of when we iterate over the alphabet, within a $TVGuide variable: <xsl:template match="TVGuide"> ... <h2>Series</h2> <xsl:variable name="alphabet" as="xs:string+" select="str:characters($alphabet)" /> <xsl:variable name="TVGuide" as="element()" select="." /> ... </xsl:template> We can then iterate over this sequence of characters twice using <xsl:for-each>, first to create a line that provides links to each alphabetical section: <xsl:template match="TVGuide"> ... <h2>Series</h2> <xsl:variable name="alphabet" as="xs:string+" select="str:characters($alphabet)" /> <xsl:variable name="TVGuide" as="element()" select="." /> <xsl:for-each select="$alphabet"> <xsl:variable name="series" as="element()*" select="key('seriesByFirstLetter', ., $TVGuide)" />
Paint Data Matrix In None
Using Barcode generator for Font Control to generate, create ECC200 image in Font applications.
www.OnBarcode.com
Barcode Generation In None
Using Barcode generator for Font Control to generate, create Barcode image in Font applications.
www.OnBarcode.com
CHAPTER 11 NAMED TEMPLATES, STYLESHEET FUNCTIONS, AND RECURSION
UPC - 13 Creator In None
Using Barcode maker for Font Control to generate, create EAN 13 image in Font applications.
www.OnBarcode.com
Printing Barcode In None
Using Barcode generation for Font Control to generate, create Barcode image in Font applications.
www.OnBarcode.com
<xsl:choose> <xsl:when test="$series"> <xsl:call-template name="link"> <xsl:with-param name="href" as="xs:anyURI" select="xs:anyURI(concat('#series', .))" /> <xsl:with-param name="content" as="xs:string" select="." /> </xsl:call-template> </xsl:when> <xsl:otherwise> <xsl:value-of select="." /> </xsl:otherwise> </xsl:choose> <xsl:if test="position() != last()"> . </xsl:if> </xsl:for-each> ... </xsl:template> and then to create each alphabetical section by accessing all the <Series> elements whose IDs start with that letter (using the key defined previously) and, if there are any, creating a heading (which includes an anchor point for the heading, so that you can link to it) and applying templates to <Series> elements: <xsl:template match="TVGuide"> ... <h2>Series</h2> <xsl:variable name="alphabet" as="xs:string+" select="str:characters($alphabet)" /> <xsl:variable name="TVGuide" as="element()" select="." /> <xsl:for-each select="$alphabet"> ... </xsl:for-each> <xsl:for-each select="$alphabet"> <xsl:variable name="series" as="element()*" select="key('seriesByFirstLetter', ., $TVGuide)" /> <xsl:if test="$series"> <h3> <a id="series{.}" name="series{.}"> <xsl:value-of select="." /> </a> </h3> <xsl:apply-templates select="$series"> <xsl:sort select="@id" /> </xsl:apply-templates> </xsl:if> </xsl:for-each> </xsl:template> TVGuide5.xsl contains these changes, and also changes the level of the headings produced by the <Series> elements, so that the structure of the document is clearer. The result of transforming TVGuide.xml with TVGuide5.xsl is TVGuide5.html, which is shown in Figure 11-2.
QR Code ISO/IEC18004 Generation In None
Using Barcode drawer for Font Control to generate, create QR Code image in Font applications.
www.OnBarcode.com
MSI Plessey Generator In None
Using Barcode generation for Font Control to generate, create MSI Plessey image in Font applications.
www.OnBarcode.com
CHAPTER 11 NAMED TEMPLATES, STYLESHEET FUNCTIONS, AND RECURSION
PDF-417 2d Barcode Maker In VB.NET
Using Barcode encoder for .NET Control to generate, create PDF417 image in .NET framework applications.
www.OnBarcode.com
PDF-417 2d Barcode Generation In Java
Using Barcode creator for Android Control to generate, create PDF 417 image in Android applications.
www.OnBarcode.com
Figure 11-2. Viewing TVGuide5.html in Internet Explorer The alphabet just underneath the Series heading gives links to the alphabetically ordered series further down the page. Both of the alphabetical orderings have been created by iterating through the characters of the alphabet, rather than by looking to see what the first letters of each series are.
QR Generator In None
Using Barcode drawer for Office Word Control to generate, create QR Code 2d barcode image in Office Word applications.
www.OnBarcode.com
Matrix Barcode Printer In Visual C#
Using Barcode printer for Visual Studio .NET Control to generate, create 2D image in Visual Studio .NET applications.
www.OnBarcode.com
Recursing with Sequences
Drawing Linear 1D Barcode In Visual C#
Using Barcode generator for VS .NET Control to generate, create 1D image in .NET framework applications.
www.OnBarcode.com
Code 128C Drawer In Objective-C
Using Barcode creation for iPhone Control to generate, create Code 128 Code Set A image in iPhone applications.
www.OnBarcode.com
Unlike strings or numbers, XSLT has built-in support for iterating over sequences using <xsl:for-each>, <xsl:apply-templates>, and the XPath expressions for, some, and every. If you need to iterate over a sequence, you should use one of these instructions rather than create a complicated recursive template. XPath also offers support for the kinds of things that you would otherwise need to do using recursion with a variety of aggregate functions. The following functions in particular are helpful in reducing the requirement for recursive templates: position() Gives you a counter count() Counts how many items there are in a sequence string-join() Concatenates the strings in a sequence sum() Sums the values of all the items in a sequence min() Returns the minimum value of the items in a sequence max() Returns the maximum value of the items in a sequence sequence
Barcode Creator In VS .NET
Using Barcode drawer for ASP.NET Control to generate, create Barcode image in ASP.NET applications.
www.OnBarcode.com
Draw Barcode In Visual C#.NET
Using Barcode creation for Visual Studio .NET Control to generate, create Barcode image in Visual Studio .NET applications.
www.OnBarcode.com
CHAPTER 11 NAMED TEMPLATES, STYLESHEET FUNCTIONS, AND RECURSION
Decode QR Code ISO/IEC18004 In .NET Framework
Using Barcode scanner for .NET framework Control to read, scan read, scan image in Visual Studio .NET applications.
www.OnBarcode.com
USS-128 Generator In Visual Basic .NET
Using Barcode drawer for .NET framework Control to generate, create USS-128 image in Visual Studio .NET applications.
www.OnBarcode.com
Even if you can t use these aggregate functions with the sequence you have, you can usually avoid the requirement for recursion by creating a sequence from the sequence you have that you can use with the appropriate aggregate function. However, there are still times when you do need to use recursion with sequences, in particular when you need to combine the items in a sequence in some way that isn t supported by one of the supplied aggregate functions. A function that works over a sequence using recursion, then, will usually have at least two parameters: one to hold the sequence that is being recursed over and another, used purely within the recursion itself, to hold the result thus far. Because the user should never have to supply a value for the second of these parameters, I usually create a helper function to perform the recursion itself, and call that function from a more user-friendly function that only includes the required parameters. Within the helper function, the first item of the sequence to be processed can be accessed using a numeric predicate, while the rest of the items are those whose position in the sequence is more than one. If you prefer, you can use the subsequence() or remove() functions to get these subsequences rather than using predicates. The recursion should stop when the sequence is empty and there are no more items to process. Thus, the basic outline for one of these functions is the following: <xsl:function name="pref:nodeRecursionFunction" as="..."> <xsl:param name="seq" as="item()*" /> <xsl:sequence select="private-pref:nodeRecursionFunction($seq, defaultValue)" /> </xsl:function> <xsl:function name="private-pref:nodeRecursionFunction" as="..."> <xsl:param name="seq" as="item()*" /> <xsl:param name="current" as="..." /> <xsl:choose> <xsl:when test="exists($seq)"> ... do something with $seq[1] ... ... private-pref:nodeRecursionFunction($seq[position() > 1], newValue) ... </xsl:when> <xsl:otherwise> <xsl:sequence select="$current" /> </xsl:otherwise> </xsl:choose> </xsl:template> An example of such a function is a function that multiplies together the items in a sequence of numbers, math:product() in product.xsl, which could be used to apply a number of discounts to a price, for example. The helper template, which actually does the recursion, needs to accept two parameters: a sequence of numbers and the product so far. If there are numbers left in the sequence, then the new product for the next recursion needs to be the result of multiplying the current product with the first of the numbers in the sequence; the result of the function is the result of calling the function recursively, with the first argument being the rest of the sequence and the second argument being the new product. If there aren t any numbers left in the sequence, then we ve come to the end of the list and can return the product that we ve found:
Encode Universal Product Code Version A In Objective-C
Using Barcode drawer for iPad Control to generate, create UPC A image in iPad applications.
www.OnBarcode.com
Encode EAN 13 In Visual C#
Using Barcode encoder for VS .NET Control to generate, create EAN-13 image in .NET framework applications.
www.OnBarcode.com
Copyright © OnBarcode.com . All rights reserved.