From: Sky Yin <sky.yin@...>
Date: 2006-01-23T23:18:48+09:00
Subject: Re: Line breaking in Ruby can be dangerous

Thanks. When I first found it out, it's really a *big* surprise. This
actually took me quite a while to debug, cause the long expression
itself that I wrote simply looked nothing-wrong at the first glance.


On 1/23/06, Adriano Ferreira <a.r.ferreira@gmail.com> wrote:
> On 1/23/06, Florian Frank <flori@nixe.ping.de> wrote:
> > "1 * 2" and "+ 1" are both valid ruby expressions, the latter "(unary +)
> > 1". How should Ruby find out, that you wanted to continue your first
> > expression in the next line?
>
> Ruby would find it out because of the leading "(" or that would be
> what I and apparently Sky Yin expect.
>
> This works:
> irb(main):001:0> (1
> irb(main):002:1> )
> => 1
>
> This too:
> irb(main):003:0> begin (1
> irb(main):004:2> ) end
> => 1
>
> But I think I understand why it works this way. In Yin's example:
>
> (1*2
> +1)
>
> is interpreted just like
> (1*2;
> +1)
>
> what would not happen if he had written
> (1*2+
> 1)
>
> which gives a proper answer.
>
> Kind regards,
> Adriano.
>
>


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