From: "Jesús Gabriel y Galán" <jgabrielygalan@...>
Date: 2010-09-11T06:56:08+09:00
Subject: Re: problem in hash and symbol

On Fri, Sep 10, 2010 at 11:19 PM, Amir Ebrahimifard <amiref@ymail.com> wrote:
> Hi everybody
> I have a question about hash and symbol. when I use symbol for key in
> hash , it didn't for me. what is the problem ?
>
> (example : hash = { :odd => [ 1 , 3 , 5 ] , :even => [ 2 , 4 , 6 ] , :7
> => "chance" , "number" => 1 } )

A symbol cannot start with a number:

irb(main):005:0> :7
SyntaxError: compile error
(irb):5: syntax error, unexpected tINTEGER, expecting tSTRING_CONTENT
or tSTRING_DBEG or tSTRING_DVAR or tSTRING_END
	from (irb):5
	from :0
irb(main):006:0> :7y
SyntaxError: compile error
(irb):6: syntax error, unexpected tINTEGER, expecting tSTRING_CONTENT
or tSTRING_DBEG or tSTRING_DVAR or tSTRING_END
	from (irb):6
	from :0

Jesus.