setintersection function reference

This topic provides reference information about the setintersection function, which computes the intersection of the specified sets.

Introduction

The setintersection function takes multiple sets and produces a single set containing only the elements that all of the given sets have in common. In other words, setintersection computes the intersection of the sets. Refer to Wikipedia's Intersection (set theory) article for a mathematical explanantion of set theory intersection.

Syntax

Use the setintersection function with the following syntax:

setintersection(sets...)

Replace sets... with a comma-delimited list of sets such as ["a","b"], ["a","c","g"]. The elements of the different sets do not have to be the same type.

The setintersection result is an unordered set.

Example use cases

This example passes in sets of strings and returns a set with one element.

> setintersection(["a", "b"], ["b", "c"], ["b", "d"])[  "b",]

This example passes in number sets of different sizes and returns a set with two elements.

> setintersection([3,3.3,4], [4,3.3,65,99], [4.0,3.3])toset([  3.3,  4,])

This examples pass in sets of different lengths and element types. The result is a set of two string elements.

> setintersection(["bob","jane",3], ["jane",3,"ajax",10], ["3","jane",26,"nomad"])toset([  "3",  "jane",])

Related Functions

• contains tests whether a given list or set contains a given element value.
• setproduct computes the Cartesian product of multiple sets.
• setsubtract computes the relative complement of two sets
• setunion computes the union of multiple sets.