Created
December 15, 2011 00:38
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Add methods for Hash to deep_stringify_keys or deep_symbolize_keys
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#Load in rails via: | |
# config/initializers/core_extensions.rb | |
#Forcibly require our core extensions after rails has loaded | |
Dir.glob(Rails.root.join('lib', 'core_ext', '*.rb')).each { |extension| require extension } |
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#lib/core_ext/hash.rb | |
class Hash | |
def deep_symbolize_keys | |
dup.deep_symbolize_keys! | |
end | |
def deep_stringify_keys | |
dup.deep_stringify_keys! | |
end | |
def deep_symbolize_keys! | |
deep_change_keys!(:to_sym) | |
end | |
def deep_stringify_keys! | |
deep_change_keys!(:to_s) | |
end | |
def deep_change_keys!(change_method = :to_s) | |
self.keys.each do |k| | |
new_key = k.send(change_method) | |
current_value = self.delete(k) | |
self[new_key] = current_value.is_a?(Hash) ? current_value.dup.deep_change_keys!(change_method) : current_value | |
end | |
self | |
end | |
end |
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require 'spec_helper' | |
describe Hash do | |
before(:all) do | |
@example_deep_hash = { | |
:sym_key => { | |
:level_1 => { | |
:level_2 => { | |
:level_3 => 'Some Value' | |
} | |
} | |
}, | |
'str_key' => { | |
'level_1' => { | |
'level_2' => { | |
'level_3' => 'Some Value' | |
} | |
} | |
} | |
} | |
@example_shallow_hash = { | |
:simple_key => 'simple value', | |
'simpleStringKey' => 'simple second value' | |
} | |
end | |
describe "#deep_symbolize_keys" do | |
before(:all) do | |
@expected_deep_hash = { | |
:sym_key => { | |
:level_1 => { | |
:level_2 => { | |
:level_3 => 'Some Value' | |
} | |
} | |
}, | |
:str_key => { | |
:level_1 => { | |
:level_2 => { | |
:level_3 => 'Some Value' | |
} | |
} | |
} | |
} | |
@expected_shallow_hash = { | |
:simple_key => 'simple value', | |
:simpleStringKey => 'simple second value' | |
} | |
end | |
it 'should be able to run without destructive update' do | |
@example_deep_hash.deep_symbolize_keys.should == @expected_deep_hash | |
@example_deep_hash.should == @example_deep_hash | |
end | |
it 'should convert deep hashes to symbolized keys' do | |
test_hash = @example_deep_hash.dup | |
test_hash.deep_symbolize_keys! | |
test_hash.should == @expected_deep_hash | |
end | |
it 'should convert simple hashes to symbolized keys' do | |
test_hash = @example_shallow_hash.dup | |
test_hash.deep_symbolize_keys! | |
test_hash.should == @expected_shallow_hash | |
end | |
end | |
describe "#deep_stringify_keys" do | |
before(:all) do | |
@expected_deep_hash = { | |
'sym_key' => { | |
'level_1' => { | |
'level_2' => { | |
'level_3' => 'Some Value' | |
} | |
} | |
}, | |
'str_key' => { | |
'level_1' => { | |
'level_2' => { | |
'level_3' => 'Some Value' | |
} | |
} | |
} | |
} | |
@expected_shallow_hash = { | |
'simple_key' => 'simple value', | |
'simpleStringKey' => 'simple second value' | |
} | |
end | |
it 'should be able to run without destructive update' do | |
@example_deep_hash.deep_stringify_keys.should == @expected_deep_hash | |
@example_deep_hash.should == @example_deep_hash | |
end | |
it 'should convert deep hashes to string keys' do | |
test_hash = @example_deep_hash.dup | |
test_hash.deep_stringify_keys! | |
test_hash.should == @expected_deep_hash | |
end | |
it 'should convert simple hashes to string keys' do | |
test_hash = @example_shallow_hash.dup | |
test_hash.deep_stringify_keys! | |
test_hash.should == @expected_shallow_hash | |
end | |
end | |
end |
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