From: Dominik Honnef <dominikho@...>
Date: 2009-03-04T00:50:40+09:00
Subject: Re: expanding environment variable

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On [Wed, 04.03.2009 00:46], Brian Candler wrote:
> Dominik Honnef wrote:
> > On [Tue, 03.03.2009 23:58], Daniel Schoch wrote:
> >> > constants like __FILE__ or simply global variables?
> >>  s =3D "x/test/y.z"
> >>=20
> >>=20
> > | >>> DIR=3Dx FILE=3Dy.z irb
> > | >> s =3D "$DIR/test/$FILE".gsub(/\$\w+/) {|m| ENV[m[1..-1]]}
> > | =3D> "x/test/y.z"
> >=20
> > Thats how I would do it.
>=20
> Or: s =3D "$DIR/test/$FILE".gsub(/\$(\w+)/) { ENV[$1] }
Probably depends on whether you like global variables or not. It is
definitely shorter/more readable and I actually didn't know if gsub
sets $1.=20
--=20
Dominik Honnef
dominikho@gmx.net

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