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It's deeply ingrained in Perl that the operators dictate what to do, and not the type of the operands (with few exceptions).

So =~ always does a regex match. If the right-hand side isn't a regex, it becomes one.

Same with . (coerces the arguments to be strings), + (coerces to numeric) etc.

Update: since the question was about documentation, I checked perlop if this was explained somewhere. I didn't find anything, so I've submitted a patch which adds such an explanation.


In reply to Re: string on right side of m//? by moritz
in thread string on right side of m//? by 7stud

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