Re^2: Break one liner command line script after first match

Hi,

as you showed it with your solution: Be aware of the subtle difference between:

perl -ne'/(data)/ && print $1 and last' file.txt

perl -ne'/(data)/ && print $1 && last' file.txt
[download]

That may bite someone (by the way: I was bitten ;-) )

McA

Comment on Re^2: Break one liner command line script after first match Download Code

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Re^3: Break one liner command line script after first match by 2teez (Vicar) on Oct 30, 2013 at 13:24 UTC
Hi, Be aware of the subtle difference between: `perl -ne'/(data)/ && print $1 and last' file.txt perl -ne'/(data)/ && print $1 && last' file.txt` [download] Of course, I saw the subtle difference, and how you used `.. print ($1) ...` [download] the parentheses which is effectively the same thing if "and" is used instead of "&&" check this: Using `perl -MO=Deparse -ne'/(data)/ && print $1 && last' file.txt` [download] you gets: `LINE: while (defined($_ = <ARGV>)) { print $1 && last if /(data)/; }` [download] but using `perl -MO=Deparse -ne'/(data)/ && print ($1) && last' file.txt` [download] gives: `LINE: while (defined($_ = <ARGV>)) { last if /(data)/ and print $1; }` [download] Which is same as this: `perl -MO=Deparse -ne'/(data)/ && print $1 and last' file.txt` [download] `LINE: while (defined($_ = <ARGV>)) { last if /(data)/ and print $1; }` [download] If you tell me, I'll forget. If you show me, I'll remember. if you involve me, I'll understand. --- Author unknown to me	[reply] [d/l] [select]
Re^4: Break one liner command line script after first match by McA (Priest) on Oct 30, 2013 at 13:32 UTC
I was sure that you know the difference. ;) I just wanted to point it out for the interested readers. And in the result we get just much more interesting stuff from you. ++ for that. Thank you. Best regards McA	[reply]