Re^3: how to find the length of any line of file -- oneliner

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.

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Re^4: how to find the length of any line of file -- oneliner by Discipulus (Canon) on Nov 23, 2017 at 11:12 UTC
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* There are no rules, there are no thumbs.. Reinvent the wheel, then learn The Wheel; may be one day you reinvent one of THE WHEELS.	[reply] [d/l] [select]

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Re^4: how to find the length of any line of file -- oneliner
by Discipulus (Canon) on Nov 23, 2017 at 11:12 UTC

Laurent_R

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.

There are no rules, there are no thumbs..
Reinvent the wheel, then learn The Wheel; may be one day you reinvent one of THE WHEELS.

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