From: Eric Mahurin <eric_mahurin@...>
Date: 2005-10-26T05:00:02+09:00
Subject: Re: String parsing?

This may be an overkill, but take a look at my grammar project:

http://rubyforge.org/projects/grammar/

You can build a lexer (what you want) and/or a parser with ruby
syntax that looks kind of like BNF.

But keep in mind the above is only the first release.  I'm
building a ruby parser/lexer right now and doing this is
revealing various holes and inconsistencies in the API.  The
basics of the API will remain unchanged though: "+" create a
sequence (from 2 grammars) and "|" will create an alternation
(from 2 grammars).  The basic idea is that you start with base
grammar objects and you build more complex grammar objects
using various methods to combine or morph them.


--- Michael Zanis <mzanis@purdue.edu> wrote:

> Hi,
> 
> I am new to ruby but have an okay background in perl.  I am
> trying to parse
> a string into an array.
> 
> string = (foo:0.05,bar:0.115);
> 
> I would like the array to look like this:
> 
> Array[0] = (
> Array[1] = foo
> Array[2] = 0.05
> Array[3] = ,
> Array[4] = bar
> Array[5] = 0.115
> Array[6] = )
> Array[7] = ;
> 
> I have a rather clunky perl script for this, but in learning
> ruby I thought
> I might see if there is an elegant way to parse this string
> using tokens.
> Thank you for any help you might have.
> 
> -M
> 
> 
> 



	
		
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