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|
xquery version "3.0";
declare namespace other = "http://other";
declare variable $local:straight-var1 := 'one';
declare %private variable $local:private-var := 'secret';
declare %public variable $local:public-var := 'not-secret';
declare %other:annotation('param1', "param2") variable $local:some-var := 'anything';
declare variable $local:straight-var2 := 'two';
(: Simple Map Operator example :)
declare function local:word-count($elms as element()*) as xs:integer {
sum($elms ! count(tokenize(., '\s+')))
};
declare function local:add($a, $b) {
$a + $b
};
declare function local:dispatch($node as node()) as item()* {
typeswitch($node)
case text() return $node
case comment() return $node
case element(bill) return local:bill($node)
case element(btitle) return local:btitle($node)
case element(section-id) return local:section-id($node)
case element(bill-text) return local:bill-text($node)
case element(strike) return local:strike($node)
default return local:passthru($node)
};
(: `switch` expression example :)
declare function local:noise($animal) {
let $duck := "Duck",
$quack := "Quack"
return
switch ($animal)
case "Cow" return "Moo"
case 'Cat' return 'Meow'
case $duck return $quack
default return "What's that odd noise?"
};
(: `group by` expression with binding example :)
declare function local:a-to-z() {
let $data as element()* := (
<item>Apples</item>,
<item>Bananas</item>,
<item>Apricots</item>,
<item>Pears</item>,
<item>Brambles</item>
) return
<GroupedItems>{
for $item in $data
group by $key := upper-case(substring($item, 1, 1))
order by $key
return
<Group key="{$key}">{$item}</Group>
}</GroupedItems>
};
(: `group by` expression example :)
declare function local:plays-by-character() {
let $plays := (
document {
<play>
<title>Hamlet</title>
<characters>
<character>Hamlet</character>
<character>Claudius</character>
<character>Polonius</character>
<character>Rosencrantz</character>
<character>Guildenstern</character>
<character>Francisco</character>
<character>Reynaldo</character>
</characters>
</play>
},
document {
<play>
<title>Rosenkrantz and Guildenstern are Dead</title>
<characters>
<character>Alfred</character>
<character>Rosencrantz</character>
<character>Guildenstern</character>
<character>Hamlet</character>
<character>Claudius</character>
</characters>
</play>
}
) return
for $play in $plays/play
let $title := $play/title
for $character in $play/characters/character
group by $character
return
<character name="{$character}">
{
$title ! <play>{ . }</play>
}
</character>
};
declare
%other:a
%private
%other:b('1')
%other:c("1", "2", "3", "4")
function local:very-annotated() {
let $thing := "thing"
return
$thing
};
declare %public function local:slightly-annotated() {
let $nothing := ()
return
$nothing
};
declare function local:ordered() {
for $hit in doc("/db/doc-with-indexes.xml")//tei:p[other:query(., $search-expression)]
let $score as xs:float := other:score($hit)
order by $score descending
return (
<p>Score: {$score}:</p>,
other:summarize($hit, <config width="40"/>)
)
};
declare function local:concat-expr($postfix) {
let $concatenated := other:uri() || "/" || $postfix
return
$concatenated
};
declare function local:human-units($bytes) {
let $unit := if($bytes > math:pow(1024, 3)) then
(math:pow(1024, 3), "GB")
else if($bytes > math:pow(1024, 2)) then
(math:pow(1024, 2), "MB")
else
(1024, "KB")
return
format-number($bytes div $unit[1], ".00") || " " || $unit[2]
};
declare function local:merge-simple($a as xs:string+, $b as xs:string+) as xs:string+ {
($a, $b)
};
(: higher order function example 1 :)
declare function local:apply($func, $value) {
$func($value)
};
(: higher order function example 2 :)
declare function local:apply-all($func, $list) {
$list ! $func(.)
};
(: higher order function example 3 :)
declare function local:apply-all-long($func as function(xs:string) as xs:string, $list) {
$list ! $func(.)
};
(: higher order function example 4 :)
declare function local:merge($func as function(xs:string+, xs:string+) as xs:string+, $a as xs:string+, $b as xs:string+) as xs:string+ {
$func($a, $b)
};
let $to-upper := upper-case#1
let $to-upper-long as function(xs:string) as xs:string := upper-case#1
return
<case>
{
local:apply-all($to-upper, ("Hello", "world!")) ! <upper>{.}</upper>,
local:apply-all-long(lower-case#1, ("Hello", "world!")) ! <lower>{.}</lower>
}
</case>
|
