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Given a Hash like this:
{ "key_1" => ["value1","value2","value3"], "key_2" => ["value4","value5"], ...}
How can I get a hash like this:
{ "value1" => "key_1", "value2" => "key_1", "value3" => "key_1", "value4" => "key_2", "value5" => "key_2" }
I have tried this:
Hash[original_hash.flat_map { |key, values| original_hash.map { |value| [value, key] } }]
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