From: Robert Klemme <shortcutter@...>
Date: 2010-12-09T15:00:18+09:00
Subject: Re: Splitting on capital letters

On 09.12.2010 02:18, Sam Duncan wrote:
> Very nice =]
>
> On 09/12/10 14:07, Siep Korteling wrote:
>> Sam Duncan wrote in post #967298:
>>
>>> This might be ridiculous, but ...
>>>
>>> ("BenefitsAndFeatures".gsub(/[A-Z]/) { |c| "-#{c}"
>>> }).reverse.chomp('-').reverse
>>>
>>> Sam
>>>
>> Eliminating the reverse.chomp.reverse:
>>
>> "BenefitsAndFeatures".gsub(/\w(?=[A-Z])/){|match| "#{match}-"}
>>
>> the (?=[A-Z]) bit is a positive lookahead; the regex matches a word
>> character followed by a capital, without making the capital part of the
>> match.

Easier with lookbehind:

irb(main):003:0> s='BenefitsAndFeatures'
=> "BenefitsAndFeatures"
irb(main):004:0> s.gsub(/(?<=[[:lower:]])[[:upper:]]+/, '-\\&')
=> "Benefits-And-Features"

#scan works, too:

irb(main):005:0> s.scan(/[[:upper:]]+[[:lower:]]+/).join('-')
=> "Benefits-And-Features"

Kind regards

	robert

-- 
remember.guy do |as, often| as.you_can - without end
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