Style-ArrayIntersect.md

Pattern: Missing use of Array#intersect?

Issue: -

Description

In Ruby 3.1, Array#intersect? has been added.

This rule identifies places where (array1 & array2).any? can be replaced by array1.intersect?(array2).

The array1.intersect?(array2) method is faster than (array1 & array2).any? and is more readable.

Examples

# bad
(array1 & array2).any?
(array1 & array2).empty?

# good
array1.intersect?(array2)
!array1.intersect?(array2)

AllCops:ActiveSupportExtensionsEnabled: false (default)

# good
(array1 & array2).present?
(array1 & array2).blank?

AllCops:ActiveSupportExtensionsEnabled: true

# bad
(array1 & array2).present?
(array1 & array2).blank?

# good
array1.intersect?(array2)
!array1.intersect?(array2)

Further Reading

• RuboCop - Style/ArrayIntersect