From: Brian Buckley <briankbuckley@...>
Date: 2006-02-01T21:59:30+09:00
Subject: Re: memoize to a file

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> > 1  What is causing this error? (possibly Windows related?)
>
> IIRC File.read(file) doesn't open the file in binary mode; try
> File.open(file, "rb"){|f| f.read}


Perfect.  Changing

cache =3D Hash.new.update(Marshal.load(File.read(file))) rescue { }
to
cache =3D Hash.new.update(Marshal.load(File.open(file, "rb"){|f| f.read}))
rescue { }

and it works.  Should this edit go into the gem (Daniel if you're
listening)?


> 2  What is the purpose of the rescue{} suppressing the error info in the
> > first place?
>
> setting cache to {} if Marshal.load fails for some reason (e.g. a major
> change in the Marshal format across Ruby versions).
>

Got it.  The error supression here is just about always the correct way to
handle the situation.

As for editing the cache, you can always do
> File.open("cache.yaml", "w") do |out|
>    YAML.dump(Marshal.load(File.open("cache", "rb"){|f| f.read}), out)
> end


Ahhh. Populate that Marshal formatted file using YAML.  Good thought.

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