Hash merging can be replaced by hash key assignment RB-PR1017
Performance
Major
a month ago
—
a year old
Use
my_hash[:'key'] = value instead of my_hash.merge!('key': value).68
69my_hash = {}
70# Raises "Hash merging can be replaced by hash key assignment"
71my_hash.merge!('key': value)72
73
74# Raises "Use `size` instead of `count`"
Description
It is more efficient to replace Hash#merge! with Hash#[]=.
Bad practice
hash.merge!(a: 1)
hash.merge!({'key' => 'value'})
Recommended
hash[:a] = 1
hash['key'] = 'value'