Ruby is based on programming languages like Perl, Smalltalk, Eiffel, Ada, and Lisp. Many cli options are same as Perl and behave similarly too. While Ruby would

Ruby is based on programming languages like Perl, Smalltalk, Eiffel, Ada, and Lisp. Many cli options are same as Perl and behave similarly too. While Ruby would be slower compared to sed/awk/perl, I find it a pleasure to use Ruby's built-in array/enumerable methods, blocks, etc. --- The post links to the web version of the ebook. You can download pdf/epub versions using the links below (free until this Sunday) * Ruby one-liners cookbook: https://gumroad.com/l/ruby-oneliners https://gumroad.com/l/ruby-oneliners or https://leanpub.com/ruby-oneliners https://leanpub.com/ruby-oneliners * Bundle of one-liners and Regexp: https://gumroad.com/l/ruby-textprocessing https://gumroad.com/l/ruby-textprocessing or https://leanpub.com/b/ruby-textprocessing https://leanpub.com/b/ruby-textprocessing Also, my 6 book bundle (regular expressions and grep/ripgrep/sed/awk) is priced $5 until Sunday: * https://gumroad.com/l/regex/off10 https://gumroad.com/l/regex/off10 * https://leanpub.com/b/regex/c/off10 https://leanpub.com/b/regex/c/off10 --- Writing a book: is it worth it? (https://news.ycombinator.com/item?id=24628549 https://news.ycombinator.com/item?id=24628549) For my unique circumstances, emphatic yes. I left my job more than 6 years back for various reasons. I tried a few things that didn't work out. Before I left the job, I had been conducting yearly workshops at my college for electronics students to get started with command line, vim, perl/python, etc. For reference material, I used provide a few slides. As something to keep me mentally occupied, I started with word document, then moved to GitHub/Gitbook. My awk tutorial (https://news.ycombinator.com/item?id=15549318 https://news.ycombinator.com/item?id=15549318) hit front page and combined with sharing on other social sites, I started getting decent traffic to my GitHub repos. My primary aim with these resource materials was to share with workshop students. Since I had failed to earn outside of workshops and my savings were dwindling, I tried putting donation button on GitHub (sponspor wasn't introduced at that time). Didn't work out. Finally, about two years back, kinda like a last try before I was forced to look for a job again, I self-published Ruby Regexp book. Didn't earn much, but couple of months later, I used this material to publish Python regex book. This was received much better, got me about $250 in initial sales. I live alone in outskirts of a city in India, and my modest lifestyle needs about $150 per month to cover my living expenses. Last year, ebook sales and workshops nearly covered my expenses. This year, pandemic put a stop to my workshops. But, ebook sales has more than covered for it so far. I have a sustainable income again. About 20k free copies given away and all my books are now free to read online. It is worth it.