Let me try to toss-in an explanation of the big picture here:
(1) In Perl, an “object” is (usually...) a hashref that has been passed to the built-in function, bless, which takes as its (usually...) two parameters the hashref to be blessed and a package name. Internally, Perl now flips a switch that says that it is “blessed,” and associates the specified package-name with it. (Yes, it can be, and occasionally is, re-blessed, which changes the associated package-name.)
Any piece of code which serves this function, no matter where it is located nor what it is named, serves this purpose. Specifically, there is nothing “magical” about a function named new.
(2) When something has been blessed, it becomes possible to use the $obj->methodname(args...) syntax. This simply translates to a subroutine call, to a sub (maybe...) found in the previously-associated package, but passing $obj as an additional, first, parameter.
You will therefore find that these subroutines begin with a statement such as my $self = shift;, which grabs that first-parameter that has been added. Once again, the name $self is simply a convention.
HTH... If you are used to looking at very formal, computer-science-y language implementations, you might be a bit startled by Perl.
Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
Read Where should I post X? if you're not absolutely sure you're posting in the right place.
Please read these before you post! —
Posts may use any of the Perl Monks Approved HTML tags:
You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
- a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
Link using PerlMonks shortcuts! What shortcuts can I use for linking?
See Writeup Formatting Tips and other pages linked from there for more info.
| & || & |
| < || < |
| > || > |
| [ || [ |
| ] || ] ||