Your post doesn't add anything new to this thread. Mine adds a correction to your last paragraph

The first case is what is used 99% of the time, because “the function is an English verb.” Effectively, it is an imperative statement. You want to “chomp” a string, and it does. If you use the implied-variable "$_" it also produces the documented result, even though nobody actually does that. If you use your own variable, it does not. Given that you probably don’t have the latest Perl installed on your machine and probably can’t change it, you have to code-around bugs like these. If the function is a verb, use it as a verb only.

which is wrong. "If you use your own variable, it does not." Of course it does! It is perfectly ok to use chomp on "your own variable." It would be interesting to find why assignment to $_ works, but fails with $line - but you don't even try, you just post the bizarre statement that this happens because “the function is an English verb.”

And then
If the function is a verb, use it as a verb only.

Wait, what?!? Where did you get that from? Where in the perl docs is stated, that "English Verbs" only behave correctly on "implied $_"? So we should never use a "own variable" with print,split, shift, unshift and so on?

See, sundialsvc4, these assertions which you just pull out from your pool of speculations, not knowledge, are what many monks here annoy and what they detest and condemn as misleading, specially to newbies, even if they make for a good laugh for experienced perlers.

perl -le'print map{pack c,($-++?1:13)+ord}split//,ESEL'

In reply to Re^2: Odd behaviour of chomp() by shmem
in thread Odd behaviour of chomp() by Salvor

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