Style-HashExcept.md

Pattern: Missing use of Hash#except

Issue: -

Description

This rule checks for usages of Hash#reject, Hash#select, and Hash#filter methods that can be replaced with Hash#except method.

This rule should only be enabled on Ruby version 3.0 or higher. (Hash#except was added in Ruby 3.0.)

Examples

# bad
{foo: 1, bar: 2, baz: 3}.reject {|k, v| k == :bar }
{foo: 1, bar: 2, baz: 3}.select {|k, v| k != :bar }
{foo: 1, bar: 2, baz: 3}.filter {|k, v| k != :bar }

# good
{foo: 1, bar: 2, baz: 3}.except(:bar)

Further Reading

• RuboCop - Style/HashExcept