Module | ActiveSupport::CoreExtensions::Hash::ReverseMerge |
In: |
vendor/rails/activesupport/lib/active_support/core_ext/hash/reverse_merge.rb
|
Allows for reverse merging where its the keys in the calling hash that wins over those in the other_hash. This is particularly useful for initializing an incoming option hash with default values:
def setup(options = {}) options.reverse_merge! :size => 25, :velocity => 10 end
The default :size and :velocity is only set if the options passed in doesn‘t already have those keys set.
Performs the opposite of merge, with the keys and values from the first hash taking precedence over the second.
# File vendor/rails/activesupport/lib/active_support/core_ext/hash/reverse_merge.rb, line 14 14: def reverse_merge(other_hash) 15: other_hash.merge(self) 16: end
Performs the opposite of merge, with the keys and values from the first hash taking precedence over the second. Modifies the receiver in place.
# File vendor/rails/activesupport/lib/active_support/core_ext/hash/reverse_merge.rb, line 20 20: def reverse_merge!(other_hash) 21: replace(reverse_merge(other_hash)) 22: end