Variable substitution in a regex

ruby-talk
1

Hi,

I am new to Ruby. Can I substitute the value of a
variable into a regular expression? For example:

exp = /(\d+)/ #works
exp = /(\d+)/ + 'some string value' #Not!

Thanks,

S

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2

Yes, the same way you interpolate in strings:

exp = /(\d+)#{'some string value'}/

Hope that helps.

James Edward Gray II

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On May 17, 2005, at 6:24 PM, Scott Pack wrote:

Hi,

I am new to Ruby. Can I substitute the value of a
variable into a regular expression? For example:

exp = /(\d+)/ #works
exp = /(\d+)/ + 'some string value' #Not!

3

Scott Pack wrote:

I am new to Ruby. Can I substitute the value of a
variable into a regular expression? For example:

exp = /(\d+)/ #works
exp = /(\d+)/ + 'some string value' #Not!

exp = /(\d+)#{variable}/

but I don’t understand if that’s what you want. Your example doesn’t
agree with your question,
        nikolai

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--
Nikolai Weibull: now available free of charge at http://bitwi.se/\!
Born in Chicago, IL USA; currently residing in Gothenburg, Sweden.
main(){printf(&linux["\021%six\012\0"],(linux)["have"]+"fun"-97);}