From: Iain Barnett <iainspeed@...>
Date: 2010-07-07T18:06:29+09:00
Subject: Re: Hashes don't allow preceding commas by design?


On 7 Jul 2010, at 09:36, Peter Hickman wrote:

> It's not hashes it is the parser in general. When it parses a line (up to
> the newline) if the line appears compete then the parser expects a new
> statement on the next line. So with
> 
> 1: => a, b = 1,
> 2: => 2
> 
> Line 1 is incomplete so the parser treats line 2 as a continuation of line
> 1. But with
> 
> 1: => a, b = 1
> 2: => ,2
> 
> Line 1 is complete in that the line contains a valid Ruby statement so the
> parser expects the next line to be a new statement, line 2 is in error
> because no valid Ruby statements start with a comma.
> 
> This is what you are seeing in your examples.

Thanks, I'm still getting used to Ruby's ways.

Iain