From: Andrea Dallera <andrea@...>
Date: 2010-12-20T05:15:13+09:00
Subject: Re: Regexp, String, Symbol literals' object_ids

Ruby has both mutable and immutable strings. A mutable string is 
declared as "string". An immutable string is declared as :string and in 
ruby is called a 'symbol'. So, no, there is no way for "string" to 
behave as :string, since that's by design. Well there is a way but I'd 
not go there :-)

If you want two equivalent string literals to point at the same 
instance, use the symbol notation, as in:

:test.object_id == :test.object_id #true

-- 
Andrea Dallera
http://github.com/bolthar/freightrain
http://usingimho.wordpress.com



Andrea

Il 19/12/2010 21:07, Pavel R. ha scritto:
> Regexp literals:
> 5.times { p /abcdasdf/.object_id } ->  same!
>
> String literals:
> 5.times { 'asdasdf'.object_id } ->  different
>
> Symbols:
> 5.times { p :asdfsf.object_id } ->  same!
>
> Symbols with to_s:
> 5.times { p :asdsdfsdf.to_s.object_id } ->  different
>
> Predefined string as a constant
> CONS = 'asdfsdf'
> 5.times { p CONS.object_id } ->  same! (sure)
>
> Question:
> Is there some special syntax for string literals ("asdfasdf") to behave
> like /sadfsdf/ as in the examples above? Without predefining a string as
> a constant's value. Or another elegant way to achieve the same goal?
>