Allows for reverse merging two hashes where the keys in the calling hash take precedence over those in the other_hash. This is particularly useful for initializing an option hash with default values:
def setup(options = {}) options.reverse_merge! :size => 25, :velocity => 10 end
Using merge, the above example would look as follows:
def setup(options = {}) { :size => 25, :velocity => 10 }.merge(options) end
The default :size and :velocity are only set if the options hash passed in doesn’t already have the respective key.
# File lib/gorillib/hashlike/reverse_merge.rb, line 19 def reverse_merge(other_hash) other_hash.merge(self) 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 lib/gorillib/hashlike/reverse_merge.rb, line 25 def reverse_merge!(other_hash) merge!( other_hash ){|k,o,n| o } end
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