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Hi toolic

Nice work, but may I suggest that

> Display the contents of variables using print or warn

> warn "$var\n";

is changed to

warn "<$var>";


Two reasons:

  • I don't see the point of disabling line and file information from warn by default by appending "\n".

    A beginner might get lost where the error originates.

  • A missing chomp is very common, surrounding brackets <...> helps finding them.

    A beginner should be made aware if his variable ends on a newline.


C:\>perl $var = "abc\n"; # trailing newline warn "$var\n"; warn "<$var>"; warn "$var"; __END__ abc <abc > at - line 4. abc

Cheers Rolf
(addicted to the Perl Programming Language and ☆☆☆☆ :)
Wikisyntax for the Monastery


I just realized that your point 3 covers chomp and detecting whitespace, but I'm still not sure why you're disabling the line info in warn.

In reply to Re: Basic debugging checklist by LanX
in thread Basic debugging checklist by toolic

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