James Fuller xquery
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| let $f := function($a){upper-case($a)} | |
| let $data := ("test","test2","test3") | |
| return | |
| $data ! $f(.) | |
| will result in | |
| ("TEST", "TEST2", "TEST3") | |
| http://www.w3.org/TR/xquery-30/#id-map-operator |
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| xquery version "1.0-ml"; | |
| let $map := map:map() | |
| let $_ := map:put($map,"test","test") | |
| let $data:= map:get($map,?) | |
| return | |
| $data('test') |
xquery
/ gist:5549109
Created
May 9, 2013 17:36
MarkLogic XQuery - averaging data with same keys across multiple maps, returning ordered map
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| xquery version "1.0-ml"; | |
| declare option xdmp:mapping "true"; | |
| let $map1:= map:map() | |
| let $_ := map:put($map1,'a',xs:float(1.0)) | |
| let $_ := map:put($map1,'b',xs:float(1.0)) | |
| let $_ := map:put($map1,'c',xs:float(1.0)) | |
| let $_ := map:put($map1,'d',xs:float(1.0)) | |
| let $_ := map:put($map1,'e',xs:float(1.0)) | |
| let $_ := map:put($map1,'f',xs:float(2)) |
xquery
/ gist:5594054
Last active
January 22, 2020 00:12
illustration of mapreduce using xquery 3.0 word count example
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| xquery version "3.0"; | |
| declare function local:mapReduce( | |
| $list as item()*, | |
| $mapper as function(*), | |
| $reducer as function(*) | |
| ) | |
| { | |
| let $intermediate := for $l at $pos in $list return $mapper("list" || $pos,$l) | |
| return |
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| In a lot of cases, gzipping content before you send it to an HTTP client can make a huge difference in download times. | |
| compare downloaded file size of the following two approaches; | |
| xquery version "1.0-ml"; | |
| let $page :=<html> | |
| <body> | |
| <h2>Without Gzip</h2> |
xquery
/ gist:6768359
Created
September 30, 2013 18:55
yes a bit of xml in memory can have base-uri as well
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| let $doc := <root xml:base="http://example.org/mydoc"></root> | |
| return | |
| base-uri($doc) |
xquery
/ gist:6785050
Last active
June 27, 2018 11:35
the 'naked' Y-combinator in XQuery 3.0 using classic factorial example, providing the ability to recurse within anonymous functions
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| xquery version "3.0"; | |
| let $makeFact := function($givenFact) { | |
| let $fact := function($n) { | |
| if( $n lt 2 ) | |
| then 1 | |
| else $n * $givenFact($n - 1) | |
| } | |
| return $fact | |
| } |
xquery
/ gist:6790119
Created
October 2, 2013 07:21
fully generalized recursion with Y-combinator in xquery 3.0 ... recursion via 'deferred execution'
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| xquery version "3.0"; | |
| let $makeFactorialFunc := function($givenFactFunc) { | |
| let $fact := function($n) { | |
| if( $n lt 2 ) | |
| then 1 | |
| else $n * $givenFactFunc($n - 1) | |
| } | |
| return $fact | |
| } |
xquery
/ gist:6831758
Created
October 4, 2013 19:52
weighted random sampling - the following somewhat contrived code will choose from a sequence a value with larger values having a higher probability of being chosen ... can you do better (as in more elegant, faster, more fp goodness)
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| xquery version "1.0-ml"; | |
| let $data := (1,1,1,1,1,1,1,1,1,20) | |
| let $choose := xdmp:random( sum($data) ) | |
| let $pos := filter( function($a){if($choose le sum($data[1 to $a])) then true() else false()}, 1 to count($data) )[1] | |
| return "weighted choose: " || $choose || " | data position: " || $pos || " value: " || $data[$pos] |
xquery
/ gist:7561028
Last active
December 28, 2015 20:59
my first frameless example - would like to be able to set default source (like saxon-ce data-source on <script/> element
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <title>Frameless Example</title> | |
| <script src="http://code.jquery.com/jquery-1.10.1.min.js"></script> | |
| <script src="http://code.jquery.com/jquery-migrate-1.2.1.min.js"></script> | |
| </head> | |
| <body> | |
| <div> |