Rails - Sep 2006 - Use of %() for Strings

I notice a lot of code throughout Rails uses this approach to build up
a String:

a = %(This is line one)
a << %(This is line two)
a

After looking through two books I can''t seem to find a description of
what exactly %() does.  Can anyone tell me what the benefits of using
%() is?

Thanks,
Dave


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On Sep 13, 2006, at 8:46 PM, daveb wrote:
>
> I notice a lot of code throughout Rails uses this approach to build up
> a String:
>
> a = %(This is line one)
> a << %(This is line two)
> a
>
> After looking through two books I can''t seem to find a description
of
> what exactly %() does.  Can anyone tell me what the benefits of using
> %() is?
The main advantage of %() is it ignores balanced parentheses inside  
the string. That makes it handy for quoting code.

Like:

code = %( foo(bar(3)) )

using %{} or %() also saves you from escaping embedded quotes in a
string, such as:

    ActiveRecord::Base.connection.execute(%{select id,admin_comments
into outfile "#{file_name}.txt" fields terminated by ","
enclosed by
"""" from users where admin_comments!="";})

On 9/13/06, Brad Ediger <brad-sod+mMc99o6+XT7JhA+gdA@public.gmane.org>
wrote:
>
>
>
>
> On Sep 13, 2006, at 8:46 PM, daveb wrote:
>
>
> I notice a lot of code throughout Rails uses this approach to build up
> a String:
>
> a = %(This is line one)
> a << %(This is line two)
> a
>
> After looking through two books I can''t seem to find a description
of
> what exactly %() does.  Can anyone tell me what the benefits of using
> %() is?
>
> The main advantage of %() is it ignores balanced parentheses inside the
> string. That makes it handy for quoting code.
>
> Like:
>
> code = %( foo(bar(3)) )
>
>
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