From: Robert Klemme <shortcutter@...>
Date: 2008-12-19T07:27:08+09:00
Subject: Re: Using ruby hash on array

On 18.12.2008 20:12, Stuart Clarke wrote:
> Sorry I was getting to replying to you then got called off in a hurry. I 
> do not understand some of the code you have used as I am relatively new 
> to Ruby. Can you briefly outline the code, it would be greatly 
> appreciated.

I define a class holding the data you want to parse from the file via 
Struct.  I then also define a parse method on that class that will take 
a line (basically a String) and parse it into a new data structure.  You 
will likely have to change these as field names like "a" and "b" are not 
really telling and also you might want to do the parsing differently.

Then I initialize a Hash with default value 0.  This is the value 
returned for keys that are not present in the Hash.

Then the code reads from all input files (ARGF) named on the command 
line (or stdin if there is no name), parses each line and increments the 
counter for the entry.

Finally the Hash is sorted by key and key value pairs are printed.

Cheers

	robert

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