Re^2: how to find the length of any line of file -- oneliner

[Discipulus]

He! no need of BEGIN block nor say and chomp

perl -lne  "print length and exit if $. == 4"

the above will work with data passed via pipe and also with a filename passed as argument.

L*

[Laurent_R]

Yes, Discipulus, no need for a begin block because you're hard coding the line number, whereas I wanted to pass it as an argument to the script and therefore needed to retrieve it (only once). Now, of course, for a one-liner, you might as well hard code the line number, it doesn't make a big difference.

[Discipulus]

Hello Laurent_R, curiously enough (for me!)

 perl -lne  "print length  and exit if $. == $ARGV[0]"  datatest.txt 4

does not complains about: Can't open 4: No such file or directory at.. and works even without the BEGIN block

It just runs ok with both passed as arguments, not with the data passed via pipe though.

L*