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operators - What does =~ do in Perl? - Stack Overflow 51 I guess the tag is a variable, and it is checking for 9eaf - but does this exist in Perl? What is the "=~" sign doing here and what are the " " characters before and after 9eaf doing?
What is the meaning of @_ in Perl? - Stack Overflow 128 perldoc perlvar is the first place to check for any special-named Perl variable info Quoting: @_: Within a subroutine the array @_ contains the parameters passed to that subroutine More details can be found in perldoc perlsub (Perl subroutines) linked from the perlvar: Any arguments passed in show up in the array @_
How does double arrow (= gt;) operator work in Perl? - Stack Overflow The => operator in perl is basically the same as comma The only difference is that if there's an unquoted word on the left, it's treated like a quoted word So you could have written Martin => 28 which would be the same as 'Martin', 28 You can make a hash from any even-length list, which is all you're doing in your example Your Readonly example is taking advantage of Perl's flexibility with
regex - What is ^ and i in Perl? - Stack Overflow The match operator is the syntax that tells the Perl interpreter: here comes a regex In Perl, the match operator is normally delimited by ' ' at start and end, but you can use delimiters (e g , m{^foo})
operators - what is ||= in perl for? - Stack Overflow In Perl, logical values are generally represented by 0 (or sometimes '' or undef) for false and 1 for true However, to be more specific, any value that is not one of the above three false values is treated as true, and sometimes programmers refer to this distinction using the informal terms "truthy" and "falsy"