89 lines
1.8 KiB
Ruby
89 lines
1.8 KiB
Ruby
# this class has dubious semantics and we only have it so that
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# people can write params[:key] instead of params['key']
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class HashWithIndifferentAccess < Hash
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def initialize(constructor = {})
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if constructor.is_a?(Hash)
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super()
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update(constructor)
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else
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super(constructor)
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end
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end
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def default(key = nil)
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if key.is_a?(Symbol) && include?(key = key.to_s)
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self[key]
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else
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super
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end
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end
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alias_method :regular_writer, :[]= unless method_defined?(:regular_writer)
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alias_method :regular_update, :update unless method_defined?(:regular_update)
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def []=(key, value)
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regular_writer(convert_key(key), convert_value(value))
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end
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def update(other_hash)
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other_hash.each_pair { |key, value| regular_writer(convert_key(key), convert_value(value)) }
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self
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end
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alias_method :merge!, :update
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def key?(key)
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super(convert_key(key))
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end
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alias_method :include?, :key?
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alias_method :has_key?, :key?
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alias_method :member?, :key?
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def fetch(key, *extras)
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super(convert_key(key), *extras)
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end
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def values_at(*indices)
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indices.collect {|key| self[convert_key(key)]}
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end
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def dup
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HashWithIndifferentAccess.new(self)
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end
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def merge(hash)
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self.dup.update(hash)
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end
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def delete(key)
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super(convert_key(key))
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end
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def stringify_keys!; self end
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def symbolize_keys!; self end
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protected
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def convert_key(key)
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key.kind_of?(Symbol) ? key.to_s : key
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end
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def convert_value(value)
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value.is_a?(Hash) ? value.with_indifferent_access : value
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end
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end
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module ActiveSupport #:nodoc:
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module CoreExtensions #:nodoc:
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module Hash #:nodoc:
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module IndifferentAccess #:nodoc:
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def with_indifferent_access
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hash = HashWithIndifferentAccess.new(self)
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hash.default = self.default
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hash
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end
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end
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end
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end
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end
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