Perl oneliners ebook by peteris krumins rakuten kobo. The perl one liners can also do the function of the wellknown unixlinux commands cut and awk that work as field extractors. In perl one liners, author and impatient hacker peteris krumins takes you through larger than 100 compelling one liners that do all forms of helpful points, comparable to control line spacing, tally column values in a desk, and get a listing of users on a system. Presents general recipes to build perl regular expression oneliners to match, replace and split, either linebyline or. Introduction to perl oneliners pdf peteris krumins. They do one thing really welllike changing line spacing, numbering lines, performing calculations, converting and substituting text, deleting and printing specific lines. They do one thing really welllike changing line spacing, numbering lines, performing calculations, converting and substituting text, deleting and printing specific lines, parsing logs, editing files inplace, calculating statistics, carrying out system.
The core of any perl one liner is the e switch, which lets you pass a snippet of code on the commandline. They are small perl programs that are run directly from command line. M and wle are command line switches or options that modify the perl s behaviour. This book illustrates just how easy things can be and how much can be done with so little code.
Of course, if you are interested in odd books, then have a look at this post about the diagram prize, for the books with the oddest title of the year. The best jokes, riddles, tongue twisters, knockknock jokes, and one liners for kids. While most perl one liners are imperative, perl s support for anonymous functions, closures, map, filter grep and fold listutilreduce allows the creation of functional one liners this one liner creates a function that can be used to return a list of primes up to the value of the first parameter. This book is based on the perl oneliners explained article series that i wrote over the last 3 years and that has been read over 1,000,000 times i went through all the one liners in the article series, improved explanations, fixed mistakes and typos, added a bunch of new one liners, added an introduction. To purchase books, visit amazon or your favorite retailer. Rather than a page about joke books, this one is about book jokes. Use features like bookmarks, note taking and highlighting while reading perl oneliners. This perl book contains more than 100 one liners that do all sorts tasks. Getting started with perl language, comments, variables, interpolation in perl, true and false, dates and time, control statements, subroutines, debug output, lists, sorting, file io reading and writing files, reading a files content into a variable and strings and quoting methods.
And just like perl 6 cleaned up perl 5s warts elsewhere, the one liner syntax is also better. Mar 20, 2017 cultured perl oneliners 102 mar 20, 2017. What are the best one liners you have read from booksnovels. Perl oneliners showcases short and compelling lines of code that do all sorts of handy, geeky. So the only fate one liners would normally aspire to would be to be relegated to a lonely corner of a book. Perl is a scripting language originating in the environment of another operating system. This book is based on the perl oneliners explained article series that i wrote over the. Note if the content not found, you must refresh this page manually. The top 10 tricks of perl oneliners oracle linux blog. Well start with a brief refresher on the basics of perl one liners before we begin. Often, the perfect tool is the one liner, a small but powerful program that fits in one line of code and does one. Tasks for perl regex one liners were ready to dive into the various types of tasks for perl regex one liners.
The second standard trick to perl one liners are the n and. Some tasks can be conveniently achieved with perl oneliners. Click download or read online button to get python one liners pdf book now. Perl oneliners are small and awesome perl programs that fit in one line of code and do one thing really well. From the book, the lighthouse by virginia woolf friendships, even the best of them, are frail things. To learn more about using bookshare with your device, visit the help center.
Generate a random eightletter password perl le print map azrand 26. Its cleaner with fewer special variables and options to memorize. The option a enables the linesplitting feature of perl. Eventually i would like to use this one liner to extract consecutive digits from each line in a large text file amelio vazquezreina jul 15 at 23.
Kids one liners book books ages rob stevens out of 5 stars 1,576. Usefull command to convert a windowsformatted text file to the unixlinux format from the commandline. Peteris krumins snappy perl programs to streamline tasks and sharpen coding skills perl one liners are small and awesome perl programs that fit in one line of code and do one thing really well. Introduction to perl one liners i think perl one liners are still super useful. Perl oneliners has been published by no starch press catonmat. Having said which, its a fun and useful learning exercise. Together with option n or p, the a option splits the input lines of text into sets of words, assuming white spaces as the field separators. These jokes come with the usual caveats that they may be neither original nor witty. This aspect of perl s greatness is easily forgotten and left in the shadows. Here is an overview of the specialized formats that bookshare offers its members with links. This isnt necessarily a natural use of powershell you can get stuff to work, but its not really playing to powershells strengths. This is so, because your eyes are used to the length of the printed book and.
This page is my attempt at creating a powershell version of peter krumins perl oneliners explained. Of human bondage by somerset maugham the simplest pattern, that in which a man was born, worked, married, had children. Everyday low prices and free delivery on eligible orders. Since many windows computing environments have perl installed, perl oneliners are a natural and compact extension of windows batch scripting. This ability to do so many tasks is the reason why perl is nicknamed the swissarmy chain saw of unix tools. This book provides many useful examples of perl 6 one liners that can do everything from finding duplicate lines in a file to running a web server. It converts inplace i switch the \r\n to \n characters using a regular. Typically you wont want to create source files for every small program. Often, the perfect tool is the one liner, a small but powerful program that fits in one line of code and does one thing really well.
Advance praise for perl one liners one of the slogans used by perl is easy things should be easy and hard things should be possible. Im happy to announce my 3rd e book called perl oneliners explained. Perl oneliners showcases short and compelling lines of code that do all sorts of handy, geeky things like numbering lines in a file. Peteris krumins perl oneliners showcases short and compelling lines of code that do all sorts of handy, geeky things. This cookbook of useful, customizable, and fun scripts will even help hone your perl coding. Perl oneliners showcases short and compelling lines of code that do all sorts of handy, geeky things. Download python one liners pdf or read python one liners pdf online books in pdf, epub and mobi format. In perl one liners, author and impatient hacker peteris krumins takes you through more than 100 compelling one liners that do all sorts of handy things, such as manipulate line spacing, tally column values in a table, and get a list of users on a system. All these oneliners are explained in greater detail in the book. Perl one liners are small and awesome perl programs that fit in a single line of code and they do one thing really well. If you have an idea for a task thats missing here, send me a comment. Perl oneliners oreilly media tech books and videos.
In perl oneliners, author and impatient hacker peteris krumins takes you through more than 100 compelling one liners that do all part of the fun of programming in perl lies in tackling tedious tasks with short. Im happy to announce my 3rd ebook called perl oneliners explained. In perl oneliners, author and impatient hacker peteris krumins takes you through more than 100 compelling one liners that do all sorts of handy things, such as manipulate line spacing, tally column values in a table, and get a list of users on a system. Next, it has a silly 00 commandline option that turns paragraph slurp mode on, meaning perl reads text paragraph by paragraph, rather than line by line. Perl oneliners remember when i said i was going to be on a plane for a combined total of 12 hours, and i was going to use it to work through a bunch of books. Download it once and read it on your kindle device, pc, phones or tablets.
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