Rails - Jun 2009 - how about using hashes as helpers ?

i had a simple idea.


first, think about:
p = proc{|x| x*2}


we can call the proc with ''[]'':
p[3] # => 6


there''s another way, which caches the result:
p = Hash.new{|h, x| h[x] = x*2}


we have the same interface as a proc call:
p[3] # => 6


then, a little bit more:
class Proc
  def memoise
    Hash.new {|h,k| h[k] = self[k]}
  end
end


finally defining a cached ''proc'' is clearer:
p = proc{|x| x*2}.memoise


So, with the benifits of the above things, how about switching rails
helper methods from defs to procs ? then you can define cached or
uncached helpers easily, and you can even use a hash or anything (which
responds to []) as a helper.


maybe route helpers can be a little bit faster ?
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