Various Ways To Fix Perl Split Loop Bug Error

December 24, 2021 By John Anthony Off

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Hopefully this user guide will help you when you run into a Perl common loop error.

PrivI meet brothers and sisters …When I run Perl 5.8 on Linux I get a loop interrupt errorto be continued …. (Perl 5.8 is designed for i386-linux-thread multi)

   $ line = $ _;@outLine is equivalent to split (/ (<[^>] *>) /, $ line);

 

  @outLine = split (/ (<[^>] *>) /, $ _);

And by no means am I getting this error when it burnswith Solaris. (Perl 5.8 is built for sun4-solaris)Unfortunately I was unable to fix this by simply replacing it$ line with $ _ in “real” code, I would like to evaluate that. Ideas?Thanks!

Perl has 3 common loop control keywords. The second, which is often used, is the next and continues to it, and there is the third, which, unfortunately, is rarely used, and is called Redo. In most other languages, some of the relevant keywords are “onward” and “vacation”. The next one from Perl is the same as continue in other languages, and the last one when Perl is the same as pause in other languages.

You can write perldoc perldiag to see what a set of built-in errors and warnings mean.

Split loop

For Perl one-liners with implicit loops (with the -n or -p options to get the lines), use the last or indeed the last LINE to break out of some loop that iterates over the data files. For example, these simple examples show almost all of the first 2 lines after writing: -e: tells Perl to look for code on that line, not in the file.

        (P) The split lasted forever. (Of course, each division       should not go through more instances than there are characters in the entry,       what and what happened.) "Split" check in perlfunc.

In Perl, I would say the function is called split. Splitting REGEX, STRING divides STRING for each REGEX part. split REGEX, STRING, LIMIT, where LIMIT is a positive number. This will certainly split the STRING for almost every match made by REGEX, but will tend to stop as soon as LIMIT-1 matches are found.

The line you are solving is so long that Perl assumed the iteration was infinite. If Perl has split the line more than the length of the line in question + 10, it will return the above error, assuming it is in an infinite loop. Unfortunately this numberis stored as a 24-bit integer that can only control and transmit up to 2 billion. Your chain is 16 billion higher than the fourth term, so the result will be incorrect.

This issue was recently fixed in version 5.20, along with many other issues with strings well over 2 GB in size. If so, your entire Perl family will be updated, your code will definitely “work”.

However, your code is terribly inefficient, but it also destroys most of the machine memory, slowing it down horribly when switching to CD. At the very least, we should really just swallow the small file and read it 16GB line by line.

  my @small_data = <$ small_fh>;eat @small_data;while (very clean $ big = <$ big_fh>)    chew big money;    for my little $ (@small_data)        ...

But even that would be terribly inefficient, if your small file contains 1000 lines then the loop will complete at $ 16 billion!

Since it looks like you are checking to see if the main file entries are in a small archive, you’d better convertName records of small files into this hash table.

  my% fields;while (my $ string implies <$ small_fh>)    chomp $ line;    my best @sp = split /: /, $ line;    $ fields $ sp [0] = $ sp [1];

Users can now view a large document and simply search the hash.

  while (war $ line = <$ big_fh>)    chomp $ line;    my @f means split (' t', string $);    if (fields $ f [0] defined)        ...

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by
To: psyche-list redhat com
Subject: Re: perl: Send Image …
Date: Wednesday, March 12, 2003 11:43:24 AM +1100

>> By Gaywood Grettl >> But I couldn’t find any tips giving split hook error message.> The bug is reported in man perldiag, but take the time to let you know.> to a split page perldoc -v. As you said, it doesn’t say anything about> your mistake.>> Could you please advise what is causing the problem?>If, when a problem arises, you need toi make an effort thenIt will not happen. Only one transcriptional shell is inserted heregreat xterm. I have just tried 4 machines, each installed withjust RedHat 8.0 and all of them.[Telford Blue Telford] $[furry telford telford] $ cat> test << EOF> #! / usr / bin / perl>> during (<>)>> matches @ x1 split (/ [ t n] + /, $ _);> Legal Notices $., “”, Scalar @ x1, “:”;> foreach $ token (@ x1)>> @ x2 = split (/ [,;] /, $ token);> Scalar log @ x2;>> Photo ” n”;>> EOF[fuzzy telford telford] $ chmod + x fuzzy test[telford telford] $ ./testsdfsdfIntermediate cycle c ./Test line <> 9, line 1.[Telford Blue Telford] $[telford inaudible telford] $. / test /etc/resolv.confDouble loop near line ./test <> 9, line 1.[telford confuses telford] $ ./test / etc / hostsDivide the loop into ./ test line <> 9, line 1.[telford hairy telford] $ ./test /usr/share/doc/glibc-2.2.93/COPYINGThe split loop is on line ./test <> 9, line 1.[inaudible telford telford] $[telford fuzzy telford] $ / usr / bin / perl -vThis is probably Perl v5.8.0, designed to get the i386-linux-thread-multiCopyright 1987-2002 Larry WallPerl can only be burned under the terms of each individual art license and.or evenThe GNU Public License, which can be found in the Perl 5 source package.Complete proofs of Perl, including lists of frequently asked questions, can be found aton this system you are using perl or perldoc perl. If you have access toitInternet, point-one browser at http://www.perl.com/, Perl home pageBook page.[telford fuzzy telford] $ rpm PerlPerl-5 -q.8.0-55[telford inaudible telford] $Added “use bytes”; fixes things but does oftenmy Perl script is incompatible with RedHat 6.2 and I don’t understand whywhich should concern foreign languages … I will also continue this ideatrying to reshape the region with encouraging results.[Telford Blue Telford] $[telford inaudible telford] $ echo $ LANGde_AU.UTF-8[telford cloud telford] $ ./testsdkfjshdfSplit loop at ./Testphrase <> 9, line 1.[telford blur telford] $ LANG =[Telford confuses Telford] $. / testssdkfjsdhfeelevensdfsd2 special: 1[telford telford] $ LANG fuzzy = en_AU.UTF-8[confused telford telford] $ ./testsdfsdfhkweSplit loop at ./Testsortiment <> 9, line 1.[telford fuzzy telford] $ Fuzzy lang = de_au[telford telford] $ ./testWqekrjwerelevensdfd2: 1[Telford Blue Telford] $By the way, my default LANG parameter “en_AU is.UTF-8” is the most important one.Something related to utf8 usually breaks … I still don’t knowunderstand how this happens, because all input characters have and should already have low ASCIIharmonize perfectly between utf8 and ASCII. Unfortunately thisThe default RedHat installation selects en_AU.utf8 as a replacement for en_AU asThe default language for Australia, but now that I understand what I am doingAt least I know how to work to support myself.

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