Piping in Perl

Raynon · #1 (**permalink**) 09-01-2008

Hi All,

I am trying to perform the below csh code in Perl, but i am unfamiliar with Perl. Can anybody give me some advice on it ?

Csh Code:

Code:

cat filename |grep AAA| grep BBB| awk '{print("already_appended")'

radoulov · #2 (**permalink**) 09-01-2008

Code:

 
perl -lne'print "already_appended" if /AAA/ and /BBB/' filename

sysgate · #3 (**permalink**) 09-01-2008

Code:

if($string =~ m/(AAA|BBB|CCC)/)
  {print "We've got a match!\n"}

in the most common case.

Raynon · #4 (**permalink**) 09-03-2008

Hi sysgate,

Think if($string =~ m/(AAA|BBB|CCC)/) is an OR function.

In short, the purpose of the below csh shell actually grabs the lines which contain both the term AAAand BBB.
However, the Perl code which you showed me will only grab those lines containing either AAA or BBB or both.

Can anybody give me some advice ?
Was wondering if the below Perl code can work ?

Code:

 if($_ =~ "AAA" && $_ =~ "BBB" ) 
{print "We've got a match!\n"}

era · #5 (**permalink**) 09-03-2008

Yes, just like in the code Radoulov already posted above. ($_ is the default target for matching, so Radoulov left it out.)

Raynon · #6 (**permalink**) 09-03-2008

Hi Era,

What if the terms we want to match is an array ?
I tried the below and it doesn;t seem to work.

Eg

Code:

 if($_ =~ @array_x[$num] && $_ =~ @array_y[$num] ) 
{print "We've got a match!\n"}

radoulov · #7 (**permalink**) 09-03-2008

Code:

 if (/$array_x[$num]/ && /$array_y[$num]/) {
   print "We've got a match!\n"
  }

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