[LRUG] An interesting Ruby hash semantics gotcha

[David A. Black]

Hi --

On Wed, 7 May 2008, Matthew Willson wrote:

> Now, I'm sure there's a reason Matz didn't do it this way - perhaps a 
> performance reason, perhaps a gotcha that I haven't noticed with my approach. 
> Perhaps it'll be fixed in 1.9.

It appears to be:

irb(main):010:0> {}.hash
=> 0
irb(main):011:0> { {} => true, {} => false }
=> {{}=>false}

(That's 1.9.0 as of April 30.)


David

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