Intersect

Produces the set intersection of two sequences.

Syntax

Intersect(second)

Parameters

second

An Iterable whose distinct elements that also appear in the first sequence will be returned.

Return Value

A sequence that contains the elements that form the set intersection of two sequences.

Remarks

This method is implemented by using deferred execution. The immediate return value is an object that stores all the information that is required to perform the action. The query represented by this method is not executed until the object is enumerated. The intersection of two sets A and B is defined as the set that contains all the elements of A that also appear in B, but no other elements.

When the object returned by this method is enumerated, Intersect enumerates source, collecting all distinct elements of that sequence. It then enumerates second, marking those elements that occur in both sequences. Finally, the marked elements are yielded in the order in which they were collected.

Example

The following code example demonstrates how to use Intersect to return the elements that appear in each of two sequences.

var id1 = Enumerable.asEnumerable([ 44, 26, 92, 30, 71, 38 ]);
var id2 = Enumerable.asEnumerable([ 39, 59, 83, 47, 26, 4, 30 ]);

var both = id1.Intersect(id2);

for (var id of both)
    console.log(id);

/*
 This code produces the following output:

 26
 30
*/

Try it out