Re: [basex-talk] Union of maps?
t...@x-query.com says too late for 3.1 (for a two-liner) which is fair
enough.
The Michael Kay version of the 2-liner looks like:
return map:merge(
for $k in distinct-values($maps!map:keys(.))
return map:entry($k, $maps?($k))
)
Your version looks like:
map:merge(
for $key in distinct-values($maps ! map:keys(.))
return map { $key: ($maps ! .($key)) }
)
I feel like I ought to update the docs with one or both but I don't
understand the syntax in the return statement of either!
Any chance of getting either or both expanded for the easily-bewildered?
On Sat, Jul 18, 2015 at 8:19 AM, Christian Grün christian.gr...@gmail.com
wrote:
Are these easy enough that a map:union() function operating on a
sequence of
maps isn't something to ask for in the next spec iteration?
Maybe yes. Feel free to propose it on the W3 issue tracker [1]. The
t...@x-query.com mailing list may be another place to discuss this.
Best,
Christian
[1]
https://www.w3.org/Bugs/Public/describecomponents.cgi?product=XPath%20%2F%20XQuery%20%2F%20XSLT
On Fri, Jul 17, 2015 at 4:18 AM, Christian Grün
christian.gr...@gmail.com
wrote:
Hi Graydon,
here is one more aproach for (it's not so flexible as the functional
approach, though):
declare function local:merge($maps as map(*)*) as map(*) {
map:merge(
for $key in distinct-values($maps ! map:keys(.))
return map { $key: ($maps ! .($key)) }
)
};
local:merge((
map { 'A': 1, 'B': 2 },
map { 'A': 3, 'C': 4 }
))
Cheers,
Christian
On Wed, Jul 15, 2015 at 8:01 PM, Graydon Saunders graydon...@gmail.com
wrote:
Hi --
In BaseX 8.2.1, I have a bunch of maps; the maps may have some overlap
of
key values. I would like to merge/find the union of all of these maps
while
retaining all the values associated with each key in the resulting
map-of-all-maps. (Combined map? Any word can be wrong, here! :)
map:merge() doesn't do this;
http://docs.basex.org/wiki/Map_Module#map:merge says
The associated value for each such key is taken from the last map in
the
input sequence $input that contains an entry with this key. and
testing
confirms this.
Is there a straightforward way to do this that I'm missing?
Thanks!
Graydon
Re: [basex-talk] Union of maps?
Hi Graydon,
The solutions look similar indeed. Here is an more verbose writing, I
hope it's helpful?
map:merge(
(: select distinct keys :)
for $key in distinct-values(
for $map in $maps return map:keys($map)
)
(: create new map entry with all values :)
return map {
$key :
for $map in $maps return $map($key)
}
)
I recommend you to have a closer look at our Wiki article on XQuery
3.1 [1] and, possibly, XQuery 3.0 [2]. We tried to summarize the new
language features in a simple and concise manner.
Cheers,
Christian
[1] http://docs.basex.org/wiki/XQuery_3.1
[2] http://docs.basex.org/wiki/XQuery_3.0
return map:merge(
for $k in distinct-values($maps!map:keys(.))
return map:entry($k, $maps?($k))
)
Your version looks like:
map:merge(
for $key in distinct-values($maps ! map:keys(.))
return map { $key: ($maps ! .($key)) }
)
I feel like I ought to update the docs with one or both but I don't
understand the syntax in the return statement of either!
Any chance of getting either or both expanded for the easily-bewildered?
On Sat, Jul 18, 2015 at 8:19 AM, Christian Grün christian.gr...@gmail.com
wrote:
Are these easy enough that a map:union() function operating on a
sequence of
maps isn't something to ask for in the next spec iteration?
Maybe yes. Feel free to propose it on the W3 issue tracker [1]. The
t...@x-query.com mailing list may be another place to discuss this.
Best,
Christian
[1]
https://www.w3.org/Bugs/Public/describecomponents.cgi?product=XPath%20%2F%20XQuery%20%2F%20XSLT
On Fri, Jul 17, 2015 at 4:18 AM, Christian Grün
christian.gr...@gmail.com
wrote:
Hi Graydon,
here is one more aproach for (it's not so flexible as the functional
approach, though):
declare function local:merge($maps as map(*)*) as map(*) {
map:merge(
for $key in distinct-values($maps ! map:keys(.))
return map { $key: ($maps ! .($key)) }
)
};
local:merge((
map { 'A': 1, 'B': 2 },
map { 'A': 3, 'C': 4 }
))
Cheers,
Christian
On Wed, Jul 15, 2015 at 8:01 PM, Graydon Saunders
graydon...@gmail.com
wrote:
Hi --
In BaseX 8.2.1, I have a bunch of maps; the maps may have some
overlap
of
key values. I would like to merge/find the union of all of these
maps
while
retaining all the values associated with each key in the resulting
map-of-all-maps. (Combined map? Any word can be wrong, here! :)
map:merge() doesn't do this;
http://docs.basex.org/wiki/Map_Module#map:merge says
The associated value for each such key is taken from the last map in
the
input sequence $input that contains an entry with this key. and
testing
confirms this.
Is there a straightforward way to do this that I'm missing?
Thanks!
Graydon
Re: [basex-talk] Union of maps?
Are these easy enough that a map:union() function operating on a sequence of
maps isn't something to ask for in the next spec iteration?
Maybe yes. Feel free to propose it on the W3 issue tracker [1]. The
t...@x-query.com mailing list may be another place to discuss this.
Best,
Christian
[1]
https://www.w3.org/Bugs/Public/describecomponents.cgi?product=XPath%20%2F%20XQuery%20%2F%20XSLT
On Fri, Jul 17, 2015 at 4:18 AM, Christian Grün christian.gr...@gmail.com
wrote:
Hi Graydon,
here is one more aproach for (it's not so flexible as the functional
approach, though):
declare function local:merge($maps as map(*)*) as map(*) {
map:merge(
for $key in distinct-values($maps ! map:keys(.))
return map { $key: ($maps ! .($key)) }
)
};
local:merge((
map { 'A': 1, 'B': 2 },
map { 'A': 3, 'C': 4 }
))
Cheers,
Christian
On Wed, Jul 15, 2015 at 8:01 PM, Graydon Saunders graydon...@gmail.com
wrote:
Hi --
In BaseX 8.2.1, I have a bunch of maps; the maps may have some overlap
of
key values. I would like to merge/find the union of all of these maps
while
retaining all the values associated with each key in the resulting
map-of-all-maps. (Combined map? Any word can be wrong, here! :)
map:merge() doesn't do this;
http://docs.basex.org/wiki/Map_Module#map:merge says
The associated value for each such key is taken from the last map in
the
input sequence $input that contains an entry with this key. and testing
confirms this.
Is there a straightforward way to do this that I'm missing?
Thanks!
Graydon
Re: [basex-talk] Union of maps?
Or, retweeked and made for multiple maps (@ Marc thanx for the inspiration)
declare function XQR.map:merge
( $mapSetas map(*)*
, $mergeFunction as function(*)
)as map(*)
{
fold-left( $mapSet
, map {}
, function( $targetMap
, $sourceMap
)
{
map:merge(( $targetMap
, $sourceMap
, for-each( map:keys( $targetMap)[ . =
map:keys( $sourceMap)]
, function( $key
)
{
map:entry( $key
,
$mergeFunction( map:get( $targetMap, $key)
, map:get( $sourceMap, $key)
)
)
}
)
))
}
)
} ;
Use:
xqr.map:merge( ( map { 'a' : ( 1,2,3,4)
, 'b' : ( 4,5,6,7)
}
, map { 'b' : ( 6,7,8,9)
, '7' : ( 'x', 'y', 'z')
}
, map { 'b' : ( 9,10,12)
, '7' : ( 'x', 'y', 'p')
}
)
, function( $data1
, $data2
)
{
distinct-values(( $data1, $data2))
}
) ! map:serialize( .)
You’re welcome,
Rob
Van: basex-talk-boun...@mailman.uni-konstanz.de
[mailto:basex-talk-boun...@mailman.uni-konstanz.de] Namens Graydon Saunders
Verzonden: woensdag 15 juli 2015 20:01
Aan: BaseX
Onderwerp: [basex-talk] Union of maps?
Hi --
In BaseX 8.2.1, I have a bunch of maps; the maps may have some overlap of key
values. I would like to merge/find the union of all of these maps while
retaining all the values associated with each key in the resulting
map-of-all-maps. (Combined map? Any word can be wrong, here! :)
map:merge() doesn't do this; http://docs.basex.org/wiki/Map_Module#map:merge
says
The associated value for each such key is taken from the last map in the input
sequence $input that contains an entry with this key. and testing confirms
this.
Is there a straightforward way to do this that I'm missing?
Thanks!
Graydon
---
Dit e-mailbericht is gecontroleerd op virussen met Avast antivirussoftware.
https://www.avast.com/antivirus
Re: [basex-talk] Union of maps?
Hi Graydon,
here is one more aproach for (it's not so flexible as the functional
approach, though):
declare function local:merge($maps as map(*)*) as map(*) {
map:merge(
for $key in distinct-values($maps ! map:keys(.))
return map { $key: ($maps ! .($key)) }
)
};
local:merge((
map { 'A': 1, 'B': 2 },
map { 'A': 3, 'C': 4 }
))
Cheers,
Christian
On Wed, Jul 15, 2015 at 8:01 PM, Graydon Saunders graydon...@gmail.com wrote:
Hi --
In BaseX 8.2.1, I have a bunch of maps; the maps may have some overlap of
key values. I would like to merge/find the union of all of these maps while
retaining all the values associated with each key in the resulting
map-of-all-maps. (Combined map? Any word can be wrong, here! :)
map:merge() doesn't do this;
http://docs.basex.org/wiki/Map_Module#map:merge says
The associated value for each such key is taken from the last map in the
input sequence $input that contains an entry with this key. and testing
confirms this.
Is there a straightforward way to do this that I'm missing?
Thanks!
Graydon
Re: [basex-talk] Union of maps?
Hi Marc -- That looks very helpful. (Just as soon as I get over feeling like a cabbage for forgetting about fold-left()!) thanks! Graydon On Wed, Jul 15, 2015 at 3:51 PM, Marc van Grootel marc.van.groo...@gmail.com wrote: Hi Graydon, have a look here https://github.com/xokomola/fold/blob/dbb79c60a7356e32a0994e581ad4f7f5377ddc72/webapp/fold-common/common.xqm#L125 hope it helps --Marc On 15 jul. 2015, at 20:01, Graydon Saunders graydon...@gmail.com wrote: Hi -- In BaseX 8.2.1, I have a bunch of maps; the maps may have some overlap of key values. I would like to merge/find the union of all of these maps while retaining all the values associated with each key in the resulting map-of-all-maps. (Combined map? Any word can be wrong, here! :) map:merge() doesn't do this; http://docs.basex.org/wiki/Map_Module#map:merge says The associated value for each such key is taken from the last map in the input sequence $input that contains an entry with this key. and testing confirms this. Is there a straightforward way to do this that I'm missing? Thanks! Graydon
[basex-talk] Union of maps?
Hi -- In BaseX 8.2.1, I have a bunch of maps; the maps may have some overlap of key values. I would like to merge/find the union of all of these maps while retaining all the values associated with each key in the resulting map-of-all-maps. (Combined map? Any word can be wrong, here! :) map:merge() doesn't do this; http://docs.basex.org/wiki/Map_Module#map:merge says The associated value for each such key is taken from the last map in the input sequence $input that contains an entry with this key. and testing confirms this. Is there a straightforward way to do this that I'm missing? Thanks! Graydon
Re: [basex-talk] Union of maps?
Hi Graydon, have a look here https://github.com/xokomola/fold/blob/dbb79c60a7356e32a0994e581ad4f7f5377ddc72/webapp/fold-common/common.xqm#L125 hope it helps --Marc On 15 jul. 2015, at 20:01, Graydon Saunders graydon...@gmail.com wrote: Hi -- In BaseX 8.2.1, I have a bunch of maps; the maps may have some overlap of key values. I would like to merge/find the union of all of these maps while retaining all the values associated with each key in the resulting map-of-all-maps. (Combined map? Any word can be wrong, here! :) map:merge() doesn't do this; http://docs.basex.org/wiki/Map_Module#map:merge says The associated value for each such key is taken from the last map in the input sequence $input that contains an entry with this key. and testing confirms this. Is there a straightforward way to do this that I'm missing? Thanks! Graydon
Re: [basex-talk] Union of maps?
Looking at that code again I think it should be rewritten to use map:for-each it's too convoluted, but it probably gives you an idea of how to proceed. Here's a test that shows how it works. https://github.com/xokomola/fold/blob/dbb79c60a7356e32a0994e581ad4f7f5377ddc72/test/fold-common/test-common.xqm#L166 --Marc On 15 jul. 2015, at 21:51, Marc van Grootel marc.van.groo...@gmail.com wrote: Hi Graydon, have a look here https://github.com/xokomola/fold/blob/dbb79c60a7356e32a0994e581ad4f7f5377ddc72/webapp/fold-common/common.xqm#L125 hope it helps --Marc On 15 jul. 2015, at 20:01, Graydon Saunders graydon...@gmail.com wrote: Hi -- In BaseX 8.2.1, I have a bunch of maps; the maps may have some overlap of key values. I would like to merge/find the union of all of these maps while retaining all the values associated with each key in the resulting map-of-all-maps. (Combined map? Any word can be wrong, here! :) map:merge() doesn't do this; http://docs.basex.org/wiki/Map_Module#map:merge says The associated value for each such key is taken from the last map in the input sequence $input that contains an entry with this key. and testing confirms this. Is there a straightforward way to do this that I'm missing? Thanks! Graydon
