instiki/vendor/rails/activesupport/lib/active_support/core_ext/hash/reverse_merge.rb
Jacques Distler 6873fc8026 Upgrade to Rails 2.0.2
Upgraded to Rails 2.0.2, except that we maintain

   vendor/rails/actionpack/lib/action_controller/routing.rb

from Rail 1.2.6 (at least for now), so that Routes don't change. We still
get to enjoy Rails's many new features.

Also fixed a bug in Chunk-handling: disable WikiWord processing in tags (for real this time).
2007-12-21 01:48:59 -06:00

26 lines
842 B
Ruby

module ActiveSupport #:nodoc:
module CoreExtensions #:nodoc:
module Hash #:nodoc:
# Allows for reverse merging where its the keys in the calling hash that wins over those in the <tt>other_hash</tt>.
# 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.
module ReverseMerge
def reverse_merge(other_hash)
other_hash.merge(self)
end
def reverse_merge!(other_hash)
replace(reverse_merge(other_hash))
end
alias_method :reverse_update, :reverse_merge!
end
end
end
end