The string-indexof() function

Smartsite 7.2 - ...

The string-indexof() extension function returns the zero-based index of the first occurrence of the specified character or string in this string, or -1 when the character or string is not found in this instance.

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int exf:string-indexof(arg1, string value, int startIndex)

Parameters:

  • arg1: a node reference or string literal.
  • value: the string to seek.
  • startIndex (optional): the search starting position.

Example

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<html xmlns="http://www.w3.org/1999/xhtml" 
  xmlns:xf="http://www.w3.org/2002/xforms"  
  xmlns:exf="http://smartsite.nl/namespaces/xforms/1.0">
 <head>
  <title>Example</title>
  <xf:model>
   <xf:instance>
    <data xmlns="">     
     <postcode>2628 XG</postcode>
     <text1>Tekst 1</text1>
     <indexof>string-indexof(string value, int startIndex)</indexof>
    </data>
   </xf:instance>
  </xf:model>
 </head>
 <body>
  <xf:group ref="/data" appearance="full">
   <xf:label />
   <xf:output value="exf:string-indexof(postcode, 'X')" />
   <xf:output value="exf:string-indexof(postcode, 'x')" />
   <xf:output value="exf:string-indexof(indexof, 'i')" />
   <xf:output value="exf:string-indexof(indexof, 'i', 10)" />
  </xf:group>
 </body>
</html>

The result will be:

5
-1
3
18


Namespace

This function is available within the Smartsite XForms namespace (http://smartsite.nl/namespaces/xforms/1.0).