From: yermej <yermej@...>
Date: 2010-02-28T05:55:08+09:00
Subject: Re: Interpolation question

On Feb 27, 12:58 pm, Dudebot <craign...@gmail.com> wrote:
> Why does
>
> text = <<ENDTEXT
> this is an <field>wibble</field>
> of stuff <field>bobble</field>
> ENDTEXT
>
> wibble = 2.0
> bobble = 3.0
>
> newtext = text.gsub( /<field>(.*?)<\/field>/, "#{\1}" )
>
> puts newtext
>
> throw this error:
> /test.rb:13: syntax error, unexpected $undefined
> newtext = text.gsub( /<field>(.*?)<\/field>/, "#{\1}" )
>
> and not interpolate to produce
> this is an 2.0
> of stuff 3.0
>
> ?
>
> And how can I do that interpolation?  (adding \s to \1, e.g. \\1
> doesn't help)
>
> Many TIA,
> Craig

It seems that this will work:

newtext = text.gsub(/<field>(.*?)<\/field>/) {|match| eval $1}

but I can't explain why what you attempted didn't work. Hopefully
somebody else can explain what's going on.

Jeremy