map:size - XPath XQuery Reference

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XPath/XQuery size function

Returns the number of entries in the supplied map.

map:size(

$map as map(*)

) as xs:integer

This function is deterministic, context-independent, and focus-independent.

The function map:size takes any map as its $map argument and returns the number of entries that are present in the map.

The expression map:size(map{}) returns 0.

The expression map:size(map{"true":1, "false":0}) returns 2.

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