Hi Guiseppe,

You could also write a helper library and simply switch the parameters yourself. So your module file.xqm would look something like that:

module namespace f = "http://guiseppe/file";

declare function f:write($items as item()*, $path as xs:string) as
empty-sequence()
{
 file:write($path, $items)
};


And then in your code you could use that as you intended 

import module namespace f="http://guiseppe/file";
"test" => f:write("out.txt")


If you use this frequently I think it is the most convenient way.
Changing the function signature I think is not going to happen because it will break existing applications.

Cheers 
Dirk


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Am 04.07.2018 um 18:28 schrieb Christian Grün <christian.gruen@gmail.com>:

Hi Giuseppe,

There has been some open discussion on the semantics of the XQuery
arrow operator in the W3 XML Query Group [1]. Back then, it was
decided that the left operand of the arrow operator is to be rewritten
as the first argument of the invoked function.

If your query returns a single item, you can use the simple map operator:

 your query ! file:write("yourPath", .)

If not, you will have to use a FLWOR expression or similar constructs.

Cheers,
Christian

[1] https://www.w3.org/Bugs/Public/show_bug.cgi?id=26889



On Wed, Jul 4, 2018 at 6:21 PM Giuseppe Celano
<celano@informatik.uni-leipzig.de> wrote:

Hi All,

I was wondering if there is a way to take full advantage of the arrow operator with file:write(). If I want to write the results of a query, it would be ideal, I think, if the first parameter of file:write() were the content to write and the second the path: in this case I could have: my query => file:write("myPath"), where I could easily comment out "=> file:write("myPath")", if needed. However, the first parameter of file:write() is the path, so I end up with using the function in the way I usually use all the other functions (this is not a big problem, but I was wondering if I could take advantage of the arrow operator here: wouldn't it be better to have the path as the second parameter in file:write()?).

Ciao,
Giuseppe