Hi Christian,
Ok, that clears it up. Somehow I suspected this, but I was thrown by the statement in the spec (and my faulty intuition) that says:
If the KeySpecifier is a wildcard ("*") and the context item is a map, unary lookup is equivalent to the following expression:
for $k in map:keys(.) return .($k)
I realize that if I didn't put an array {} around the return value then this statement would be correct.
Just thought I caught a loophole there. I stand corrected. ;-)
On Sat, Aug 15, 2015 at 3:59 PM, Christian Grün christian.gruen@gmail.com wrote:
Hi Marc,
The result is correct: The FOR clause of the FLWOR expression always binds one item at a time. If you want to bind sequences, you should use arrays in your map constructor:
let $map := map { 'a': [1,2,3], 'b': [4,5,6] } return $map?*
Hope this helps, Christian
On Sat, Aug 15, 2015 at 3:47 PM, Marc van Grootel marc.van.grootel@gmail.com wrote:
Hi,
Unless I'm not reading the spec[1] correctly then the following two snippets should have the same result:
Example 1:
let $map := map { 'a': (1,2,3), 'b': (4,5,6)} for $k in map:keys($map) return array { $map($k) }Example 2:
let $map := map { 'a': (1,2,3), 'b': (4,5,6)} for $k in $map?* return array { $k }However, this is not the case. The first outputs, as I expected:
([1,2,3], [4,5,6])The second, counter intuitively returns (on 8.2.3) this:
([1],[2],[3],[4],[5],[6])The spec indicates that both examples result should be identical. Didn't check if the same is going on with arrays.
Hmmm?