From: James Edward Gray II <james@...>
Date: 2005-12-10T06:14:49+09:00
Subject: Re: new to Ruby - pls help in translating this

On Dec 9, 2005, at 3:02 PM, mental@rydia.net wrote:

> Quoting Sam Dela Cruz <sam.dela.cruz@philips.com>:
>
>> Here's what I decided on using (looks more like what I originally
>> posted in perl):
>>
>> hash = Hash.new(0)
>> File.open(ARGV[0],"r").each do |line|
>>     hash[line.chomp] += 1
>> end
>>
>> hash.keys.sort.each do |key|
>>     puts "#{key}: #{hash[key]}" if hash[key] > 1
>> end
>
> One caution here -- if you want the file handle to be closed when
> you are finished, you must do either:
>
>  stream = File.open(ARGV[0],"r")
>  stream.each do |line|
>    hash[line.chomp] += 1
>  end
>  stream.close
>
> or (this is often better because it will automatically close the
> handle even if there's an exception):
>
>  File.open(ARGV[0],"r") do |stream|
>    stream.each do |line|
>      hash[line.chomp] += 1
>    end
>  end

Or:

File.foreach(ARGV.first) do |line|
   # ...
end

James Edward Gray II