From: "Darryl L. Pierce" <mcpierce@...>
Date: 2011-08-10T04:20:27+09:00
Subject: Re: *WHY* does this not work?

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On Wed, Aug 10, 2011 at 04:11:05AM +0900, serialhex wrote:
> On Tue, Aug 9, 2011 at 3:05 PM, Darryl L. Pierce <mcpierce@gmail.com> wro=
te:
>=20
> > On Wed, Aug 10, 2011 at 03:52:59AM +0900, serialhex wrote:
> > > ok, so code:
> > >
> > > str =3D 'foo'
> > > =3D> "foo"
> > > str.each_char do |c|
> > >   c =3D 'x'
> > > end
> > > =3D> "foo"
> > >
> > > WHY does str =3D=3D 'foo' still??
> >
> > Because each_char is not destructive to the original string's value. It
> > moves through the string as an array of characters and then passes each
> > one _by value_ to the block supplied. So while you might be able to
> > locally alter the value for that character, you don't have access to the
> > original string itself in the block.
>=20
> so is there a way to do that?  easily without  jumping through hoops of
> fire??

You want to iterate through a string and change individual characters?
Why not just do:

str =3D "farkle"
(0...str.size).each {|index| str[index] =3D 'x'}

--=20
Darryl L. Pierce <mcpierce@gmail.com>
http://mcpierce.multiply.com/
"What do you care what people think, Mr. Feynman?"

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