Heads up: This description was created by AI and might not be 100% accurate.

zero_init.rb

This Ruby code snippet demonstrates the use of a default value initializer in a hash. Initially, a hash is created with a default value of 0 for any key. The += 1 operation increments the value associated with the key ‘key’ to 1, effectively initializing the key’s value to 1 if it doesn’t already exist.

Ruby code snippet

hash = Hash.new(0)
#=> {}
hash['key'] += 1
#=> 1

Executed with Ruby 3.4.5.