From: William James <w_a_x_man@...>
Date: 2005-09-16T04:01:34+09:00
Subject: Re: Appropriate use of "inject()" ?


itsme213 wrote:
> I have a hash table HASH containing strings, and want to generate a string
> for an equivalent Javascript variable JS from it e.g.
>
> HASH = {'a' => 'A', 'b' => 'B'}
>
> "var JS = { 'a' : 'A', 'b' : 'B' }"
>
> I thought inject was just the ticket:
>
> 'var JS = {' +
>   HASH.inject("") { |str, kv| str << "\n\t'#{kv[0]}' : #{kv[1]}, " } +
>   "};"
>
> But this puts a "," after the last item. Is there a simple alternative?
>
> Thanks.

puts "var JS = {\n\t" + HASH.map{|k,v|
  "'#{k}' : #{v}" }.join(",\n\t") + " };"