From: Joel VanderWerf <vjoel@...>
Date: 2009-06-02T10:33:13+09:00
Subject: Re: Ruby enhancement suggestion

Steve Hull wrote:
> class Hash
>   def join(key_value_sep="=>", pair_sep=",")
>     result = ""
>     self.each { |k,v| result << k.to_s << key_value_sep << v.to_s <<
> pair_sep }
>     result.chomp pair_sep
>   end
> end

Not too hard in ruby:

   h = {:a => 1, :b => 2, :c => 3}

   p h.map{|pair| pair.join("=>")}.join(",")

That's short enough that I wouldn't bother with a method, but if you prefer:

class Hash
   def join(key_value_sep="=>", pair_sep=",")
     map{|pair| pair.join(key_value_sep)}.join(pair_sep)
   end
end

I guess the reason this isn't standard is that it is not very common (?) 
to treat the keys and values of a hash as strings, regardless of what 
they really are (note that the fact that keys are symbols is lost in the 
code above).

-- 
       vjoel : Joel VanderWerf : path berkeley edu : 510 665 3407