Reg Ex

[Charles Pareto]

I'm querying through the .com's looking for any www name with Cisco in
it.
I'm using a reg exp that is reading a file line by line obtained by
Verisign that has all the domain names with a .com extension.
Here is my reg exp:

file.each { |line| print line if line =~ /(C|c)isco|CISCO/ }

but I'm getting results like SanFrancisco and Francisco.

Does anyone know how I can modify my reg exp to not include certain
keywords like SanFrancisco and Francisco?


-Chuck

 

[Xavier Noria]

I'm querying through the .com's looking for any www name with Cisco in
it.
I'm using a reg exp that is reading a file line by line obtained by
Verisign that has all the domain names with a .com extension.
Here is my reg exp:

file.each { |line| print line if line =~ /(C|c)isco|CISCO/ }

but I'm getting results like SanFrancisco and Francisco.

Does anyone know how I can modify my reg exp to not include certain
keywords like SanFrancisco and Francisco?

You need to assert word boundaries:

/\b((C|c)isco|CISCO)\b/

-- fxn

 

[S P Arif Sahari Wibowo]

file.each { |line| print line if line =~ /(C|c)isco|CISCO/ } ....
Does anyone know how I can modify my reg exp to not include
certain keywords like SanFrancisco and Francisco?

How about:
/\b([Cc]isco|CISCO)\b/

or even

/\bcisco\b/i

?

 

[Robert Klemme]

The boundaries could be a good idea, but if he needs urls like
ciscosystems.com, with the final \b won't match. Keep that in sight

file.each { |line| print line if line =~ /(C|c)isco|CISCO/ } ...
Does anyone know how I can modify my reg exp to not include
certain keywords like SanFrancisco and Francisco?

How about:
/\b([Cc]isco|CISCO)\b/

or even

/\bcisco\b/i

I'd probably use a second rx like

file.each { |line| print line if line =~ /\bcisco/i && line !~ /sanfrancisco/i}

Kind regards

robert

 

[Jimmy Kofler]

Posted by Charles Pareto (chuckdawit) on 07.09.2007 00:58

I'm querying through the .com's looking for any www name with Cisco in it.
I'm using a reg exp that is reading a file line by line obtained by
Verisign that has all the domain names with a .com extension.
Here is my reg exp:

file.each { |line| print line if line =~ /(C|c)isco|CISCO/ }

but I'm getting results like SanFrancisco and Francisco.

Does anyone know how I can modify my reg exp to not include certain
keywords like SanFrancisco and Francisco?


-Chuck
Reply with quote

Maybe also try something like: print line if line =~
/^(?!.*(?:SanFrancisco|Francisco)).*\Bcisco/i


Cheers

j.k.

 

[Phrogz]

I'm querying through the .com's looking for any www name with Cisco in
it.
I'm using a reg exp that is reading a file line by line obtained by
Verisign that has all the domain names with a .com extension.
Here is my reg exp:

file.each { |line| print line if line =~ /(C|c)isco|CISCO/ }

but I'm getting results like SanFrancisco and Francisco.

Does anyone know how I can modify my reg exp to not include certain
keywords like SanFrancisco and Francisco?

Instead of modifying the regex, how about simply working on the data
until it's right?

ACCEPTABLE = [ /francisco/i, /scisco/i ]
matches = file.readlines.select{ |line| line =~ /[Cc]isco|CISCO/ }
ACCEPTABLE.each{ |re| matches.delete_if{ |line| line =~ re } }
puts matches

 

[Charles Pareto]

Does anyone know how I can modify my reg exp to not include certain
keywords like SanFrancisco and Francisco?

Instead of modifying the regex, how about simply working on the data
until it's right?

ACCEPTABLE = [ /francisco/i, /scisco/i ]
matches = file.readlines.select{ |line| line =~ /[Cc]isco|CISCO/ }
ACCEPTABLE.each{ |re| matches.delete_if{ |line| line =~ re } }
puts matches

If I want to print the line to a new file I use this:
dnsfile.each { |line| newfile.puts line if line =~
/(\b((C|c)isco|CISCO)\b) /

what can I do if I want to print it to a newfile and print it to the
screen at the same time?