Shell Programming and Scripting

It (1) is an expression which (being 1) always evaluates to true (for which the default action is to print the whole line).

It's for people (like me) who are too lazy to type:

Code:

{ print }

Thanks scottn, and all of you.
i learnt a lot on the awk. i never know by using such a simple line can do this. before i always use perl file, while open and do the \sth\sth replace, then reput them into a string. [COLOR="#738fbf"]

---------- Post updated at 11:57 AM ---------- Previous update was at 11:56 AM ----------

the 1.txt file has more than 30k lines. so by using the awk, or the perl one line code it runs just 1 sec, but the old methold i am using cost me 20 secs more.

Code:

my $tmp3="";
open($FA, "1.txt") or die "$!";
$tmp3=",,".$tmp3;
while(<$FA>) {
        chomp;
       @tmp=split(/\t/, $_);
       $tmp3="$tmp3".trim($tmp[0]).",,";
}
sub trim
{
        my $tmp = shift;
        $tmp =~ s/^\s+//;
        $tmp =~ s/\s+$//;
        $tmp =~ s/^\?+//;
        $tmp =~ s/\?+$//;
        return $tmp;
}