Dear Jean-Marc,

Welcome back!

Maps in XQuery are simple key/value pairs; neither keys nor values
will be arranged in a specific order.

If you want to sort map by keys before outputting them, you can sort
them in a second step:

  let $map := map:merge((
    map:entry(0.1, "Sunday"),
    map:entry(5.0, "Thursday"),
    map:entry(2.0, "Monday"),
    map:entry(3.0, "Wednesday"),
    map:entry(0.5, "Tuesday"),
    map:entry(6.0, "Friday"),
    map:entry(7.0, "Saturday")
  ))
  for $key in sort(map:keys($map))
  return "* " || $key || ": " || $map($key)

Hope this helps,
Christian

On Tue, Sep 26, 2017 at 11:29 AM, jean-marc Mercier
<jeanmarc.mercier@gmail.com> wrote:
> Hello BaseX team,
>
> It has been a while since I last wrote to this mailing list ! Happy to
> report again :)
>
> I have a strange behavior concerning map, it doesn't seem to sort as I
> expected. Is there any explanation ?
>
> let $map as map(xs:double,xs:string) := map:merge((
>   map:entry(xs:double(0.1), "Sunday"),
>   map:entry(xs:double(5.0), "Thursday"),
>   map:entry(xs:double(2.0), "Monday"),
>   map:entry(xs:double(3.0), "Wednesday"),
>   map:entry(xs:double(0.5), "Tuesday"),
>   map:entry(xs:double(6.0), "Friday"),
>   map:entry(xs:double(7.0), "Saturday")
> ))
> return $map
>
> output :
> map {
>   2: "Monday",
>   3: "Wednesday",
>   5: "Thursday",
>   6: "Friday",
>   7: "Saturday",
>   0.1: "Sunday",
>   0.5: "Tuesday"
> }
>
> Cheers