I think Will is looking for a JSON syntax similar to map:new with map:entry
args, which sometimes feels a little cleaner than calling map:map and map:put.
As far as I know there's no direct equivalent for JSON.
Until someone comes up with a better way, here are some utility functions that
work with ML8. This approach probably trades away some performance for
convenience, but it could have some value in a utility library.
declare function local:json-entry($k as xs:string, $v as item()+)
{
element json:entry {
element json:key { $k },
$v ! element json:value { . } }
};
declare function local:json-new($entries as element(json:entry)*)
{
json:object(element json:object { $entries })
};
local:json-new(
(local:json-entry('x', 1),
local:json-entry('y', 2)))
The code for json:value could and should be extended to add xsi:type attributes.
Another way would be to xdmp:unquote a JSON string, but in that case you might
as well just build the final JSON string yourself.
-- Mike
> On 11 Mar 2015, at 18:52 , Erik Hennum <[email protected]> wrote:
>
> Hi, Will:
>
> You can use json:object() instead of map:map() for a mutable object where
> order is important.
>
> I think the API is the same as that of map:map otherwise.
>
> JSON nodes, like XML nodes, are immutable.
>
> Erik Hennum
>
> ________________________________________
> From: [email protected]
> [[email protected]] on behalf of Will Thompson
> [[email protected]]
> Sent: Tuesday, March 10, 2015 5:09 PM
> To: MarkLogic Developer Discussion
> Subject: [MarkLogic Dev General] Constructing JSON objects
>
> Is there a nice way to construct a JSON object similar to how maps can be
> constructed? Typically I would just do it this way:
>
> xdmp:to-json(
> map:new((
> map:entry('x', 1),
> map:entry('y', 2)
> )))
>
> Except that order is important in this specific scenario, and this ruins
> ordering.
>
> -Will
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