MarkLogic 9 Product Documentation

fn:map

fn:map(
   $function as function(item()) as item()*,
   $seq as item()*
) as item()*

Summary

Applies the function item $function to every item from the sequence $seq in turn, returning the concatenation of the resulting sequences in order. For more details, see XPath 3.0 Functions and Operators.

Example

fn:map(function($a) { $a * 2 }, (1 to 10))
=> (2, 4, 6, 8, 10, 12, 14, 16, 18, 20)