APM: Regular Expression Question

[David Bluestein II]

The interval qualifier matches number of characters adjacent, so this 
would match strings (excluding double quotes):

""
"\t"
"\t\t"
"\t\t\t"

so it is looking for \t adjacent to each other.

David

On Aug 16, 2006, at 10:32 AM, Jay Flaherty wrote:

> try
> $piece =~ s/\t{0,3}/\"\t\"/g;
> This is an interval quantifier where {0,3} means you require a minimum
> of 0 matches up to a maximum of 3 matches
>
> This is untested of course.
>
> Jay
>
> On 8/16/06, Barron Snyder (CE CEN) <Barron.Snyder at wholefoods.com> 
> wrote:
>>
>>
>>
>>
>> $piece =~ s/\t/\"\t\"/g;
>>
>>
>>
>> With the above code I'm searching for all tab characters and 
>> replacing them
>> with a tab surrounded by double-quotes. Is there a way without 
>> putting this
>> in a coding loop, to replace say, only the first three instances it 
>> finds in
>> $piece? It seems like a nice way to do this would to be able to 
>> replace the
>> "g" with an integer indicating how many replacements to do but it 
>> doesn't
>> seem to work like that <grin>.
>>
>>
>>
>> I'm parsing some columnar data (7 columns) and I want to put 
>> double-quotes
>> around the first six columns. I've figured out a way to do it but 
>> it's kind
>> of clumsy. I thought you experts may be able to show a Perl newbie a 
>> more
>> elegant way to do it.
>>
>>
>>
>> Thanks,
>>
>>
>>
>> Barron Snyder
>>
>> Software Development, Financial Systems Team
>>
>> Whole Foods Market, HQ
>>
>> barron.snyder at wholefoods.com
>>
>>
>>
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>
>
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David H. Bluestein II
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ii, inc.                                                  
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