Get Advanced Perl Programming PDF

Javascript

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 finished programmer. It covers complicated thoughts for handling production-ready Perl courses and explains tools for manipulating information and gadgets that can have gave the impression of magic ahead of. 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's also a dialogue of internals that will help you application 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), complicated information constructions, 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.

Show description

Read Online or Download Advanced Perl Programming PDF

Best javascript books

New PDF release: Maintainable JavaScript

You could have convinced rules approximately writing code while operating on my own, yet workforce improvement calls for that everybody use an identical method. With the JavaScript practices during this book—including code kind, programming information, and automation—you’ll the way to write maintainable code that different group contributors can simply comprehend, adapt, and expand.

Download PDF by Ido Green: Web Workers: Multithreaded Programs in JavaScript

Web apps might run far better if heavy calculations might be played within the history, instead of compete with the consumer interface. With this ebook, you’ll how to use internet employees to run computationally extensive JavaScript code in a thread parallel to the UI. sure, multi-threaded programing is complex, yet net staff supply an easy API that is helping you be effective with no the complicated algorithms.

If you may have an intermediate to complex realizing of JavaScript— specially occasion dealing with and callbacks—you’re able to take on internet staff with the instruments during this example-driven guide.
• commence developing internet employees and comprehend what they could and can’t do
• make sure which browser models aid the API
• Use committed internet staff for projects that devour loads of CPU, akin to facts parsing
• discover use instances for growing inline employees, equivalent to encapsulating an online app in a single web page
• Create a shared employee to speak a number of internet app cases to the server, and different makes use of
• study top practices for debugging net employees
• observe net staff in the server-side Node atmosphere

Using the HTML5 Filesystem API: A True Filesystem for the - download pdf or read online

A number of client-side garage techniques can be found to net functions, yet one sector that is been missing previously is dossier I/O - the power to prepare binary info right into a actual hierarchy of folders. That has replaced with the arrival of HTML5. With this booklet, you are going to methods to offer your purposes with a dossier method that permits them to create, learn, and write documents and folders in a sandboxed part of the user's neighborhood filesystem.

Extra resources for Advanced Perl Programming

Sample text

6. 7 shows the picture when you create a reference to an element of an array or a hash. 7: Referring to a list element When you take a reference to an element of an array (or a hash), Perl increments that scalar value's reference count. If, say, you now pop it from the array, its reference count goes down by 1 because the array is no longer interested in the scalar value. But since there is an outstanding reference to the array element (and its reference count is still 1), it is not destroyed. 8 shows the picture after @array has been popped once.

Let us say you want your script to process a command-line option such as "-Ddebug_level=3" and set the $debug_level variable. This is one way of doing it: while ($arg = shift @ARGV){ if ($arg =~ /-D(\w+)=(\w+)/) { $var_name = $1; $value = $2; $$var_name = $value; # Or more compactly, $$1 = $2; } } On the other hand, Perl's eagerness to try its damnedest to get an expression to work sometimes doesn't help. In the preceding examples, if you expected the program logic to have a real reference instead of a string, then you would have wanted Perl to point it out instead of making assumptions about your usage.

To make the matrix routines developed in the previous section work for this new representation, it might seem a simple matter to convert all square brackets to braces. True, it'll work, but there's a subtle problem. Let's say that the entire third row of a matrix is zero-valued (so there's no entry for $r_mat->{2}). Now, if you do this: $element = $r_mat->{2}{3}; Perl automatically creates an entry for $r_mat->{2}, and hangs a hash reference off this entry. ) Thus the very act of examining an element gobbles up space, which is what we had hoped to avoid in the first place when we chose the hash of hashes representation.

Download PDF sample

Advanced Perl Programming by Sriram Srinivasan


by Steven
4.3

Rated 4.14 of 5 – based on 42 votes