From: Gavin Kistner <Gavin.Kistner@...>
Date: 2005-06-14T07:14:42+09:00
Subject: Re: creating a ! method

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One potential way to accomplish this is what I did in my MutableTime =
class[1]. Create a new class that has an internal Time instance variable =
and -- when you want to 'round' your time -- replace this instance =
variable with the new Time instance. Judicious use of #method_missing =
allows your class to pass off any methods it doesn't understand to the =
time instance.
=20
[1] http://phrogz.net/RubyLibs/rdoc/files/MutableTime_rb.html

________________________________

From: Jamis Buck [mailto:jamis@37signals.com]
Sent: Mon 6/13/2005 11:55 AM
To: ruby-talk ML
Subject: Re: creating a ! method




On Jun 13, 2005, at 11:51 AM, Kurt V. Hindenburg wrote:

> Hello,
>   I have this code.  It works fine but I would like to use=20
> round_to_interval!.
> I could not figure out how to code that.  Any suggestions?
>
> class Time
>    def round_to_interval!
>       # how?
>    end
>
>    def round_to_interval
>       self - (self.min % 10) * 60
>    end
> end
>
>

Time objects are immutable (like numbers, symbols, etc.), so you=20
cannot alter them directly.

- Jamis




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