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Postings from October 2022
On 10/22/22 21:11, Bruce Gray wrote: > > >> On Oct 22, 2022, at 10:28 PM, ToddAndMargo via perl6-users <perl6-users@perl.org> wrote: >> >> Hi All, >> >> Is there a way to print only the last three lines >> in a long file (full on \n's). >> >> >> In Windows, I am trying to such the last the lines is >> >>> dir /s /A:-D /d /a >> ... >> Total Files Listed: >> 13671 File(s) 3,265,285,462 bytes >> 3917 Dir(s) 18,406,518,784 bytes free >> >> And yes, I know how to do it, > > It would be generally helpful to tell us the way that you already "know how to do it", so that if our guesswork is insufficiently astute, we don't waste time telling you what you already know. > >> but IT AIN'T PRETTY! >> I want pretty. >> >> -T > > $ raku -e '.say for 1..1_000_000' > a.1 > # Made a million-line file, for testing > > $ time raku -e '.say for lines().tail(3)' a.1 > 999998 > 999999 > 1000000 > real 0m2.155s > user 0m1.727s > sys 0m0.249s > > On Unix or Mac systems (and maybe Windows, UnxUtils or CygWin or GnuWin32 or Microsoft's own "Windows Subsystem for Linux"), faster (and prettier) to pipe to `tail -3`. > $ tail -3 a.1 > (and I presume) > C:\> dir /s /A:-D /d /a | tail -3 > Thank you! No time of that type in Windows. This is my non-pretty way. It takes about two seconds. > dir . /s /A:-D /d /a | raku -e "my Str $x=slurp(); $x~~s/ .* 'File(s) '//; $x~~s/ ' bytes' .*//; say $x" 3,275,857,307Thread Previous | Thread Next