Oh no why did I read Swift's docs on hashing
XORing hashcodes together 
Oh man remind me to tell you about the XORing hashes thing in Rails when I see you
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pwning Ruby's hashing was demonstrated in the same presentation that announced SipHash: https://www.youtube.com/watch?v=wGYj8fhhUVA …
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This is much less interesting than that. Just won't fit in a tweet.
End of conversation
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