From: Brian Nice <bnice_99@...>
Date: 2006-09-01T03:49:23+09:00
Subject: Re: splitting string to hash

William Crawford wrote:
> Brian Nice wrote:
>> I have a strings like the following:
>>   s1- "[1] Hello [2] bye"
>>   s2- "[1] Hello [2] bye [2:1] continue [2] more"
>> 
>> I want to convert them to hashes like
>>   h1- {1 => "Hello", 2 => "bye"}
>>   h2- {1 => "Hello", 2 => "bye", "2:1" => "continue", "2:2" => more"}
>> 
>> Is there an easy Ruby way to do this?
>> Thanks for the help
>> Brian
> 
> Assuming that James is correct in that :2 is missing from the second 
> string, this works:
> 
> h2 = Hash[*s2.scan(/\[([^\[\]]+)\] (\w+)/).flatten]
> 
> (I'm starting to really like Ruby.)
> 
> In case that's not clear, scan uses a regex to provide an array of 
> 2-element arrays from the text.  Then flatten makes it into a single 
> array, then the * turns it into a list of just values, instead of an 
> array.  Then Hash[] turns each 2 values into a hash.

Actually the original was correct - the second 2 should have a key of 
2:2 even though it only appears in the original string as 2 (since it 
follows a 2:1, it is assumed that any number after it would be 2:x. If 
there was a 3:1 sometime later, then the next two would have a key of 
3:2)

s2- "[1] Hello [2] bye [2:1] continue [2] more"

Thanks for the help
Brian

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