From: "list. rb" <list.rb@...>
Date: 2007-07-04T09:21:02+09:00
Subject: Re: Using a block to surround a string?

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def around_string(string)
  yield.join(string)
end

puts around_string("abc") { ["before", "after"] }

On 7/3/07, Pete Yandell <pete@notahat.com> wrote:
>
> Ivan Vega wrote:
>
> > around_string('mystring') {|b, a| b = 'before'; a = 'after';}
>
> You want:
>
>    around_string('mystring') { ['before', 'after'] }
>
> > def around_string(string, &block)
> >     b, a = yield
> >     "#{b}#{string}#{a}"
> > end
>
> And you wnat:
>
>    def around_string(string)
>      b, a = yield
>      "#{b}#{string}#{a}"
>    end
>
> For a quick intro to blocks, see the five minute talk I gave on them
> last week:
>
>    http://www.cogentconsulting.com.au/screencasts/index.html
>
> A block, however, seems like a terrible way of doing this. Have you
> considered using an options hash?
>
>    around_string('mystring', :before => 'before', :after => 'after')
>
>    def around_string(string, *options)
>      "#{options[:before]}#{string}#{options[:after]}"
>    end
>
>
> Pete Yandell
> http://notahat.com/
>
>

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