fn.count

fn.countfncount

/apidoc/8.0/fn:count.xml

Returns the number of items in the value of $arg.

Returns 0 if $arg is the empty sequence.

The sequence of items to count. If you pass in a single value, it is treated as a ValueIterator with that single item; therefore, if you pass in an array, the array is treated as a single value (not as one value for each item in the array). If you mean to pass in the values of each item in the array, then you can call xdmp.arrayValues on the array.

arg

ValueIterator

The maximum value of the count to return. MarkLogic Server will stop count when the $maximum value is reached and return the $maximum value. This is an extension to the W3C standard fn:count function.

maximum

Number?

Number

var seq1 = xdmp.arrayValues(["item1", "item2"]);
var seq3 = null ;
fn.count(seq1);
=> 2

var seq1 = xdmp.arrayValues(["item1", "item2"]);
var seq3 = null ;
fn.count(seq3);
=> 0

var seq2 = xdmp.arrayValues([98.5, 98.3, 98.9]);
fn.count(seq2);
=> 3

var seq = xdmp.arrayValues([98.5, 98.3, 98.9]);
var seq2 = new Array();
for (var x in seq) {
  if (x > 100) {
    seq2.push(x);
  }
};
fn.count(xdmp.arrayValues(seq2)); 
=> 0