Imagine an area code getting split and having to replace a single area code with one of two depending on the original exchange in hundreds of files. Now, this is a fairly simple example and could have easily been done using a tool such as sed, but the important thing is that you could have used any arbitrarily complex perl program as the filter, and done highly complex manipulations. # perl -i.bak -p -e "s#/home/george#/home/curious#" `find. The following one-liner will do just that:
PERL SCRIPTING LANGUAGE UPDATE
For example, suppose you have renamed the /home/george directory to /home/curious, and want to update a few hundred scripts in the /usr/lib/yellowhat directory to point at the correct new path. In-place editing: Combine regular expressions with the ability to edit files “in place” from the command line, and perl makes a dandy tool for performing a batch modification on a group of files. It’s not for nothing that a lot of the popular log file auditing packages are written in perl. Another is parsing log files with a fixed but variable length format. A typical use of this capability is to scan an input stream for name/value pairs and split them. For most developers, perl was the first time they ever used a regular expression.Īs a result, perl has always been the go-to language for any task that involves pattern-matching input. Pattern matching: Perl’s greatest claim to fame has always been the tight integration of regular expressions into the base language syntax. With that in mind, here’s some recommended uses and abuses of the elder statesman of scripting. Like any language, perl has its strengths and weaknesses. The O’Reilly “Camel” book ( Programming perl) has been a ubiquitous presence on cubicle bookshelves for decades. By comparison, PHP wasn’t released until 1994, and Python didn’t have its 0.9 release until 1991-only the Unix shells themselves have an older pedigree. Perl is the granddaddy of the open-source scripting languages, with the 1.0 release seeing the light of day way back in 1987.
PERL SCRIPTING LANGUAGE SOFTWARE
We Just tried our best to cover the right thing and avoid any controversy.Beyond Ajax: Software Development, Two Years from Now In this article we have not supported and/or rejected, any programming language neither can anyone do it.
It is all about the task and the tool best suited for both of the above programming language has different goal and comparing them is a unfruitful task. As a Developer one must choose his tool carefully. The debate of Perl vs Python is very much religious. Creates problem when the codes are larger say more than 200 Lines.
As scripting, it is slower for a lot of tasks.Many ways to achieve same result, means unreadable code, which in turn means untidy code.Can be Imperative, Procedural, Functional or Object Oriented, depends upon need.Extremely Powerful Programming Language.Follows Traditional Approach by using Braces for functions and Loops.
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