Show HN: An eBook with hundreds of GNU Awk one-liners • Hacker News Board

Re: Show HN: An eBook with hundreds of GNU Awk one-liners

#11

Post by asicsp » Thu, Apr 02, 2020, 2:18 PM UTC

ojagodzinski wrote: post #7

epub version will by available?

Some others have asked for an epub version too. I have this article [1] bookmarked, so if it goes well, I'll add epub as well this month. If you know pandoc, you could use the markdown source in the repo to generate a basic version and see if it works with your reader.

[1] https://cmichel.io/how-to-create-beautiful-epub-programming-...

Re: Show HN: An eBook with hundreds of GNU Awk one-liners

#12

Post by waynesonfire » Thu, Apr 02, 2020, 2:29 PM UTC

you forgot to attach your amazon referral link!

Re: Show HN: An eBook with hundreds of GNU Awk one-liners

#13

Post by Koshkin » Thu, Apr 02, 2020, 2:39 PM UTC

This is great. Studying the work of masters is the best way to learn a trade.

Re: Show HN: An eBook with hundreds of GNU Awk one-liners

#14

Post by asicsp » Thu, Apr 02, 2020, 2:41 PM UTC

waynesonfire wrote: post #12

you forgot to attach your amazon referral link!

I haven't published these books on amazon. The github repo has the links for leanpub/gumroad, they allow PDF which amazon doesn't as far as I know.

Re: Show HN: An eBook with hundreds of GNU Awk one-liners

#15

Post by kirubakaran » Thu, Apr 02, 2020, 2:53 PM UTC

Clickable urls:

https://github.com/learnbyexample/learn_gnuawk

https://learnbyexample.github.io/books/

Re: Show HN: An eBook with hundreds of GNU Awk one-liners

#16

Post by tannhaeuser » Thu, Apr 02, 2020, 3:13 PM UTC

I always like when classic lean-and-mean Unix tools get attention, as opposed to big language ecosystems. Speaking of which, is there a particular reason why only gawk is covered? gawk has only very minor enhancements to POSIX awk, and gawk isn't even the default in many place. For example, Debian uses, or used to use, mawk as default, while the BSDs and Mac OS have nawk. I think the point of awk is that it's portable, and introducing gawkisms in your program not only makes it non-portable, but also would make it impossible to run on mawk, which is much much faster for eg. log file analysis. Might not matter all that much for one-liners, though.

Re: Show HN: An eBook with hundreds of GNU Awk one-liners

#17

Post by celias » Thu, Apr 02, 2020, 3:30 PM UTC

Congeec wrote: post #8

Is there any equivalents of perl one-liners?

no starch press sells a Perl One Liners book. https://nostarch.com/perloneliners

Re: Show HN: An eBook with hundreds of GNU Awk one-liners

#18

Post by asicsp » Thu, Apr 02, 2020, 3:31 PM UTC

tannhaeuser wrote: post #16

I always like when classic lean-and-mean Unix tools get attention, as opposed to big language ecosystems. Speaking of which, is there a particular reason why only gawk is covered? gawk has only very minor enhancements to POSIX awk, and gawk isn't even the default in many place. For example, Debian uses, or used to use, mawk as default, while the BSDs and Mac OS have nawk. I think the point of awk is that it's portabl…

Agree about portability issues. I cover only gawk, because I don't know all the differences between various versions. This started as a chapter in my command line text processing repo, where I cover various tools. I had come across various posts on stackoverflow/unix.stackexchange about implementation differences. I use Ubuntu, so I made a choice of sticking to GNU/Linux to make my life simpler.

I'm not sure about your point saying "only very minor enhancements". When I posted about my book on reddit, I got this comment [1] noting feature differences.

[1] https://www.reddit.com/r/commandline/comments/fqkc6r/just_pu...

Re: Show HN: An eBook with hundreds of GNU Awk one-liners

#19

Post by kick » Thu, Apr 02, 2020, 3:38 PM UTC

tannhaeuser wrote: post #16

I always like when classic lean-and-mean Unix tools get attention, as opposed to big language ecosystems. Speaking of which, is there a particular reason why only gawk is covered? gawk has only very minor enhancements to POSIX awk, and gawk isn't even the default in many place. For example, Debian uses, or used to use, mawk as default, while the BSDs and Mac OS have nawk. I think the point of awk is that it's portabl…

gawk is pretty much everywhere now that awk sees substantial use, and presents rather great enhancements over POSIX awk[1]. I usually don't think that GNU tools make much sense to focus on, but gawk is something that's, generally-speaking, worth doing so. Especially given that it runs on almost everywhere under the sun.

[1] http://www.skeeve.com/awk-sys-prog.html

Re: Show HN: An eBook with hundreds of GNU Awk one-liners

#20

Post by tyingq » Thu, Apr 02, 2020, 3:55 PM UTC

obituary_latte wrote: post #5

tyingq wrote: post #2

Very nice. I had cobbled up a "one liner" (sort of) gawk webserver on here a couple a months ago: https://news.ycombinator.com/item?id=22085459 I tried making it scalable, but unfortunately, the server sockets in gawk don't set SO_REUSEPORT. So, I can't fork usable children. It does work if you use LD_PRELOAD tricks, or edit the gawk binary to change SO_REUSEADDR to SO_REUSEPORT, but both are pretty hacky. If gawk wo…

Very cool. Works on iOS with iSH surprisingly. FOUND index.html FOUND favicon.ico

Oh wow. I wouldn't have guessed iSH would have packaged up the extensions I'm using.