Performance-RedundantMerge.md

Pattern: Missing use of Hash#[]=

Issue: -

Description

This rule identifies places where Hash#merge! can be replaced by Hash#[]=.

Examples

hash.merge!(a: 1)
hash.merge!({'key' => 'value'})
hash.merge!(a: 1, b: 2)

Default configuration

Attribute	Value
MaxKeyValuePairs	2

Further Reading

• RuboCop - Performance/RedundantMerge
• https://github.com/JuanitoFatas/fast-ruby#hashmerge-vs-hash-code