webdash-readme-preview
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Preview your README.md straight from the dashboard
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declare option output:method 'json';
(
let $map := map { 'R': 'red', 'G': 'green', 'B': 'blue' }
return (
$map?* (: 1. returns all values; same as: map:keys($map) ! $map(.) :),
$map?R (: 2. returns the value associated with the key 'R'; same as: $map('R') :),
$map?('G','B') (: 3. returns the values associated with the key 'G' and 'B' :)
),
('A', 'B', 'C') => count(),
for $country in db:open('factbook')//country
where $country/@population > 100000000
let $name := $country/name[1]
for $city in $country//city[population > 1000000]
group by $name
return <country name='{ $name }'>{ $city/name }</country>
)