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New PDF release: Advanced Perl Programming

By Sriram Srinivasan

ISBN-10: 1565922204

ISBN-13: 9781565922204

No matter if your wisdom of Perl is informal or deep, this booklet will make you a extra comprehensive programmer. It covers complicated suggestions for dealing with production-ready Perl courses and explains equipment for manipulating facts and items which could have appeared like magic prior to. in addition, it units Perl within the context of a bigger surroundings, giving you the historical past you would like for facing networks, databases, and GUIs. it is also a dialogue of internals that can assist you software extra successfully and embed Perl inside of C or C inside of Perl. significant themes comprise the sensible use of programs and sessions (object-oriented programming), advanced facts buildings, patience (e.g., utilizing a database), networking, graphical interfaces utilizing the Tk toolkit, interplay with c program languageperiod capabilities, embedding and increasing the Perl interpreter, and chosen internals.

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Sample text

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. ", $r_prof->{name}, " Office hours conflict with course $course_taught\n"; } for $j ($i ..

Print $$ra; # $a seen from one level of indirection. print $$$rra; # replace ra with {$rra} : still referring # to $a's value print $$$$rrra; # ... and so on. "[5] Each variable name is prefixed by its type ("r" for reference, "rh" for reference to a hash, "i" for integer, "d" for double, and so on). Something like the following would immediately trigger some suspicion: $$rh_collections[0] = 10; # RED FLAG : 'rh' being used as an array? You have a variable called $rh_collections, which is presumably a reference to a hash because of its naming convention (the prefix rh), but you are using it instead as a reference to an array.

Being as rich as C++ in data types and with no memory management hassles, it holds immense promise for programming-in-the-large. 7 References in Other Languages Chapter 1 Data References and Anonymous Storage Next: 2. 8 Resources 1. perlref (Perl documentation) 2. Uniprocessor Garbage Collection Techniques. Paul Wilson. International Workshop on Memory Management, 1992. This paper gives a comprehensive treatment of GC issues. 7 References in Other Languages Advanced Perl Programming Next: 2. Implementing Complex Data Structures Book Index 2.

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Advanced Perl Programming by Sriram Srinivasan

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