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functx:all-whitespace

Whether a value is all whitespace or a zero-length string

Description

The functx:all-whitespace function tests whether a string (or node that is atomized) is all whitespace or empty. If $arg is the empty sequence, it returns true.

Arguments and Return Type

XQuery Function Declaration

declare namespace functx = "http://www.functx.com";
declare function functx:all-whitespace
  ( $arg as xs:string? )  as xs:boolean {

   normalize-space($arg) = ''
 } ;

Examples

<in-xml>
   <a>    </a>
   <b>x    </b>
   <c>  <x>x</x>    </c>
</in-xml>

functx:all-whitespace('   ')

true

functx:all-whitespace(' x  ')

false

functx:all-whitespace($in-xml/a)

true

functx:all-whitespace($in-xml/b)

false

functx:all-whitespace($in-xml/c)

false

functx:all-whitespace($in-xml/c/text()[1])

true

See Also

History