Are Ruby formatted strings and interpolated strings identical in behaviour?

Posted by Steve Weet on Stack Overflow See other posts from Stack Overflow or by Steve Weet
Published on 2010-04-28T12:56:17Z Indexed on 2010/04/28 13:33 UTC
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ruby

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ruby-on-rails

Do the following two lines of code behave in exactly the same way despite slightly different implementations

values.map{ |k,v| __send__('%s=' % k.to_s, v) }
values.map{ |k,v| __send__("#{k.to_s}=", v) }

The second line would be a more common ruby idiom so I was wondering why the other method was used when this was in the Rails Core which I would expect to use idiomatic ruby.

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