Learning symbol

ruby-talk
1

From: Shannon Fang [mailto:xrfang@hotmail.com]
case header.to_s.intern
^^^^^^^^^
when :TO, :CC, :BCC
…
when :FROM
…
end

Use #intern

···

-----Original Message-----

2

Hi,

Tks. But can anybody comments if it worth to convert

case string
                   when "string1"
...

to
case string.intern
when :string1

??

Thanks.
Shannon

···

On Tue, 3 Dec 2002 08:50:51 +0900 David Naseby david.naseby@eonesolutions.com.au wrote:

-----Original Message-----
From: Shannon Fang [mailto:xrfang@hotmail.com]
case header.to_s.intern
^^^^^^^^^
when :TO, :CC, :BCC
…
when :FROM
…
end

Use #intern

3

The data you are comparing is a String, so I would just use strings. Symbols
have their uses, but they are not supposed to take over the world.

David Naseby identified a speed difference, but that will only affect you if
you are doing a lot of comparisons.

Therefore, I recommend:

case header.lowercase
when “to”, “cc”, “bcc”
…
when “from”
…
end

Good luck.

Gavin

···

----- Original Message -----
From: “Shannon Fang” xrfang@hotmail.com

Hi,

Tks. But can anybody comments if it worth to convert