This XQuery Module contains various small utility and helper functions. Please note that some of the functions are used for internal query rewritings. They may be renamed or moved to other modules in future versions of BaseX.
Conventions
All functions and errors in this module and errors are assigned to the http://basex.org/modules/util namespace, which is statically bound to the util prefix.
Functions
util:item-at
| Signatures
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util:item-at($sequence as item()*, $position as xs:double) as item()?
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| Summary
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Returns the item from $sequence at the specified $position. Equivalent to $sequence[$position].
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| Examples
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util:item-at(reverse(1 to 5), 1) returns 5.util:item-at(('a','b'), 0) returns an empty sequence.
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util:item-range
| Signatures
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util:item-range($sequence as item()*, $first as xs:double, $last as xs:double) as item()*
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| Summary
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Returns items from $sequence, starting at position $first and ending at $last. Equivalent to subsequence($sequence, $first, $last - $first + 1).
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| Examples
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util:item-range(//item, 11, 20) returns all path results from (if available) position 11 to 20.
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util:last-from
| Signatures
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util:last-from($sequence as item()*) as item()?
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| Summary
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Returns last item of a $sequence. Equivalent to $sequence[last()].
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| Examples
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util:last-from(reverse(1 to 100)) returns 1.
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util:replicate
Template:Mark.
| Signatures
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util:replicate($sequence as item()*, $count as xs:integer) as item()*
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| Summary
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Returns $count instances of the specified $sequence. Equivalent to (1 to $count) ! $sequence.
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| Errors
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negative: The specified number is negative.
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| Examples
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util:replicate('A', 3) returns A A A.
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Errors
| Code
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Description
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negative
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The specified number is negative.
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Changelog
- Version 9.0
The Module was introduced with Version 8.5.
