Jonathan Fantham wrote:
> On another side note:
>
> @Ryan - You wrote:
>
> A more efficient way is to do this is:
> @project_names = Project.all(:select => 'name').map(&:name)
>
> While you've made a database optimisation there, you've also used the
> shorthand notation for the map function. I read somewhere that map
> (&:name) is quite a bit less efficient than map{ |p| p.name }
>
> unfortunately I can't find the article that convinced me in the first
> place... I can only find this blog with the issue mentioned in the
> comments:
>
> http://blog.hasmanythrough.com/2006/3/7/symbol-to-proc-shorthand
The Symbol#to_proc syntax is slower than a block, but unless you're
doing it thousands of times, the single trip to the database is probably
at least a few orders of magnitude more expensive.
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