From: Tom Stuart <tom@...>
Date: 2009-10-09T02:58:48+09:00
Subject: Re: ZipFile.extract overwrite option

2009/10/8 Ingmar Hamer <iggy@pop.ms>:
> Hi
>
> I'm trying to extract a Zipfile using the ZipFile Class.
> According to the docs,
> http://rubyzip.sourceforge.net/classes/Zip/ZipFile.html#M000150"
> the extract method takes a third param to specify the behaviour if a
> file already exists.
>
> However if I try to use that param I get a "wrong number of arguments (3
> for 2)" error.
>
>
> My code:
>
> =====================================================
> require 'fileutils'
> require 'zip/zip'
> require 'zip/zipfilesystem'
>
> def unzip(file,destination)
>    Zip::ZipFile.open(file) { |zip_file|
>    zip_file.each { |f|
>    f_path=File.join(destination, f.name)
>    FileUtils.mkdir_p(File.dirname(f_path))
>    zip_file.extract(f, f_path, proc { true })
>   }
>  }
> end
> =====================================================
>
>
> What am I doing wrong?

Zipfile#extract's third argument is prefixed with &, which means it
expects to be called like so:

...
zip_file.extract(f, f_path) { true }
...