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Contents
module Iowa
# This is a subclass of Ruby's Hash that implements a few convenient
# methods used by IOWA.
class Hash < Hash
# A simple little routine to downcase any String used as a key
# in a hash or any hash nested as value somewhere within the hash.
# Thanks to Daniel Berger for this implementation.
def downcase_keys!
upper = /A-Z/
self.each do |k,v|
next unless k.kind_of? String
self[k.dup.downcase] = v
self.delete(k) if upper.match(k)
end
end
# Convert any symbolic keys to strings.
def stringify_keys!
self.each do |k,v|
next if k.kind_of? String
self[k.to_s] = v
self.delete k
end
end
def step_merge!(h)
h.each do |k,v|
if v.kind_of?(::Hash)
if self[k].kind_of?(::Hash)
unless self[k].respond_to?(:step_merge!)
if dp = self[k].default_proc
self[k] = Iowa::Hash.new {|h,k| dp.call(h,k)}.step_merge!(self[k])
else
osk = self[k]
self[k] = Iowa::Hash.new
self[k].step_merge!(osk)
end
end
self[k].step_merge!(v)
else
if self.default_proc
self.delete k
self[k]
end
unless self[k].kind_of?(::Hash)
self.delete k
self[k] = Iowa::Hash.new
end
self[k].step_merge!(v)
end
else
self[k] = v
end
end
end
end
end
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6 entries across 3 versions & 1 rubygems