12 lines
233 B
Ruby
12 lines
233 B
Ruby
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class Hash
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def keep_keys(*keys)
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keys = keys.map{|k| k.to_s}
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clone.delete_if{|k,v| !keys.include?(k.to_s)}
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end
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def keep_keys!(*keys)
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keys = keys.map{|k| k.to_s}
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delete_if{|k,v| !keys.include?(k.to_s)}
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end
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end
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