From: Brian Candler <B.Candler@...>
Date: 2003-05-29T23:14:14+09:00
Subject: Re: getting a variable into regexp problems

On Thu, May 29, 2003 at 10:16:41PM +0900, Kingsley wrote:
> In version 1.6.8 I could do it - but version 1.8 complains about using
> an explicit regexp:
>  
> var = "apple"
> array = %w(pineapple, hamapple, cheese, dog, cat, apple)
>  
> array.each do |x|
>             if x =~ var then puts x
>             end
> end

That's because you're using =~ to match a string to a string, rather than a
string to a regexp.

> I have tried doing if x =~ /var/ and =~ /#{var}/ but that doesnt work :(

The second of those should be fine:

var = "apple"
array = %w(pineapple hamapple cheese dog cat apple)
array.each do |x|
    puts x if x =~ /#{var}/
end
#>> pineapple
#   hamapple
#   apple

Regards,

Brian.