From: Michael Linfield <globyy3000@...>
Date: 2008-04-04T12:41:33+09:00
Subject: Re: using a range as a key

Alex Wayne wrote:

>   class RangedHash
>     def initialize(hash)
>       @ranges = hash
>     end
> 
>     def [](key)
>       @ranges.each do |range, value|
>         return value if range.include?(key)
>       end
>       nil
>     end
>   end
> 
>   ranges = RangedHash.new(
>     1..10 => 'low',
>     21..30 => 'medium',
>     41..50 => 'high'
>   )
>   ranges[5]  #=> "low"
>   ranges[15] #=> nil
>   ranges[25] #=> "medium"

Beautiful. Works great,

However! The file that I'll be importing will probably contain a large 
amount of traffic being pushed at RangedHash.new

If I had a predefined data file ie:

12345..12350 => 89734, 23456..23460 => 23532

ect ect. commas separating the ranges like above...How do I import the 
literal of that file instead of the string.

file = File.readlines('testdata.txt') # this creates only 1 array 
element

file[0].class
#=> String
file[1]
#=> nil

So this obviously wouldn't work in a manner of the following:

ranges = RangedHash.new(file)

Same goes for file = File.open('testdata.txt', 'w+')
Maybe Marshaldump is the way to go?

Ideas?

Thanks!

- Mac
-- 
Posted via http://www.ruby-forum.com/.