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regex in variable

 
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# 1  
Old 08-08-2007
regex in variable
Hello!
I have problems with syntax...
I want a variable, that contains regex... is it possible?
Like $ a='.+->.+' and then use it in index ($0, "a").
I guess it won't work...

thank you Smilie
# 2  
Old 08-08-2007
Yes - use eval. For example, here I define a regex then use it with egrep
Code:
$ regex='.+->.+'
$ echo -e "somestring->someotherstring\ndont_match_this"
somestring->someotherstring
dont_match_this
$ echo -e "somestring->someotherstring\ndont_match_this" | eval egrep "\$regex"
somestring->someotherstring

Cheers
ZB
# 3  
Old 08-08-2007
Thank you!
I know, that must be simple, but I can't figure out , why it is not working...
I need a regex, that finds strings like "Aaaa->Bbbbb" but not "Aaaa-> Bbbbb"

I tried .+-+>+.+ but it finds also with spaces...
and .+-+>+[A-Z]+ finds totally wrong...
# 4  
Old 08-08-2007
Code:
$ echo 'Aaaa->Bbbbb' | egrep '.+-+>+[^ ]+'
Aaaa->Bbbbb
$ echo 'Aaaa-> Bbbbb' | egrep '.+-+>+[^ ]+'
$

# 5  
Old 08-08-2007
Thanks Smilie Now I got it Smilie
 
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