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Removing text from a line in a file

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# 8  
Old 02-13-2008
Quote:
Originally Posted by outthere_3
open(F, "<file") or die "cannot open file:$!\n";
while ( <F> ) {
if ( /nul/ ) {
@a = split(/nul/);
print $a[0] . "]\n";
}
}
close(F);

can you please explain this line by line for me.
open and while loop : perldoc perlopentut
split : perldoc -f split
# 9  
Old 02-13-2008
Same thing can be achieved by

Code:
sed 's/\(.*\) nul.*/\1]/' inuput_file

# 10  
Old 02-13-2008
Quote:
Originally Posted by ghostdog74
don't have to use regular expression. Unless i read your requirement wrong,
Code:
open(F, "<file") or die "cannot open file:$!\n";
while ( <F> ) {
 if ( /nul/ ) {
  @a = split(/nul/);
  print $a[0] . "]\n";
 } 
}
close(F);

output:
Code:
# ./test.pl
[na *oparea* check 0 ]

But you are using a regexp (2 of them), just a much simpler one. If that works, is a nice lean solution.
# 11  
Old 02-13-2008
Quote:
Originally Posted by KevinADC
But you are using a regexp (2 of them), just a much simpler one. If that works, is a nice lean solution.
yes, i should've said, "don't have to use too much regular expression". generally, the if the operation is not too complex, simple regex or string functions will suffice.
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