Download Advanced Perl Programming by Sriram Srinivasan PDF

By Sriram Srinivasan

ISBN-10: 1565922204

ISBN-13: 9781565922204

No matter if your wisdom of Perl is informal or deep, this ebook will make you a extra comprehensive programmer. It covers complicated thoughts for dealing with production-ready Perl courses and explains tools for manipulating facts and items that can have seemed like magic prior to. in addition, it units Perl within the context of a bigger surroundings, giving you the heritage you wish for facing networks, databases, and GUIs. it's also a dialogue of internals that will help you application extra successfully and embed Perl inside C or C inside of Perl. significant subject matters contain the sensible use of programs and periods (object-oriented programming), advanced info buildings, patience (e.g., utilizing a database), networking, graphical interfaces utilizing the Tk toolkit, interplay with c program languageperiod services, embedding and lengthening the Perl interpreter, and chosen internals.

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When variables (named values) go out of scope, the binding between the name and the value is removed, resulting in the value's reference count being decremented. [7] [7] For efficiency, Perl doesn't actually delete it; it just sends it to its own free pool and reuses it when you need a new value. It is logically deleted, nevertheless. The reference counting technique is sometimes referred to as "poor man's garbage collection," in contrast to much more sophisticated techniques used by environments such as LISP, Java, and Smalltalk (though the early versions of Smalltalk used reference counting).

For each problem, we will examine different ways of representing the same data and study the trade-offs in program versus programmer efficiency. In the interest of clarity, we will not worry too much about error handling. ) [3]. This series contains a motley collection of topics that crop up on the Perl Usenet groups. I admire them for their lucid, patient, and detailed explanations and recommend that you read them at some point. ) Some of them are now packaged with the Perl distribution; in particular, the perldsc (data structures cookbook) document is a tutorial for building and manipulating complex structures.

D+)-(\d+)/); # if $from or $to is less than 7, it must be afternoon. Normalize # it by adding 12. Then reduce it to a zero base by subtracting 7 # (that is, 7 hrs to 19 hrs becomes 0 - 12. 4. 4: Checking Constraints on a Professor's Time sub prof_check_constraints { my ($prof) = @_; my $r_prof = $profs{$prof}; # %profs created by prof_read_file my $office_hours = $r_prof->{Office Hours}; my $rl_courses = $r_prof->{Courses}; for $i (0 .. $#{$rl_courses}) { $course_hours = course_get_hours($rl_courses->[$i]); if (interval_conflicts($office_hours, $course_hours)) { print "Prof.

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Advanced Perl Programming by Sriram Srinivasan

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