Interests: Regular Expressions, Linux CLI one-liners, Scripting Languages and Vim
Well, if you are comfortable with Python scripts, there’s not much reason to switch to awk
. Unless perhaps you are equating awk
to Python as scripting languages instead of CLI usage (like grep
, sed
, cut
, etc) as my ebook focuses on. For example, if you have space separated columns of data, awk '{print $2}'
will give you just the second column (no need to write a script when a simple one-liner will do). This of course also allows you to integrate with shell features (like globs).
As a practical example, I use awk
to filter and process particular entries from financial data (which is in csv format). Just a case of easily arriving at a solution in a single line of code (which I then save it for future use).
I’ll recommend some from the lesser known progression fantasy genre:
Not my site, just sharing a link I saw on HN.
Well, I’m not going to even try understanding the various features used in that sed
command. I do know how to use basic loops with labels, but I never bothered with all the buffer manipulation stuff. I’d rather use awk/perl/python for those cases.
This might work, but I think it is best to not tinker further if you already have a working script (especially one that you understand and can modify further if needed).
perl -pe 's/\[[^]]+\]\((?!https?)[^#]*#\K[^)]+(?=\))/lc $&=~s:%20|\d\K\.(?=\d):-:gr/ge'
Hmm, OP mentioned “Only edit what’s between parentheses” - don’t see anywhere that whole URL shouldn’t be changed…
Here’s a solution with perl
(assuming you don’t want to change http/https after the start of (
instead of start of a line):
perl -pe 's/\[[^]]+\]\(\K(?!https?)[^)]+(?=\))/lc $&=~s|%20|-|gr/ge' ip.txt
e
flag allows you to use Perl code in the substitution portion.\[[^]]+\]\(\K
match square brackets and use \K
to mark the start of matching portion (text before that won’t be part of $&
)(?!https?)
don’t match if http
or https
is found[^)]+(?=\))
match non )
characters and assert that )
is present after those characters$&=~s|%20|-|gr
change %20
to -
for the matching portion found, the r
flag is used to return the modified string instead of change $&
itselflc
is a function to change text to lowercaseGNU datamash (https://www.gnu.org/software/datamash/alternatives/) - handy tool for data munching. There’s also https://github.com/BurntSushi/xsv
Check out my chapter on GNU grep BRE/ERE for those wanting to learn this regex flavor: https://learnbyexample.github.io/learn_gnugrep_ripgrep/breere-regular-expressions.html (there’s also another chapter for PCRE)
Memory, Sorrow, and Thorn by Tad Williams
I use Vim ;)
Python itself provides IDLE, which is good enough for beginners. https://thonny.org/ is another good one for beginners.
As mentioned by others, Jetbrains is good for many languages. https://www.kdevelop.org/ is another option.
I wish you success. I’m happy to use SimpleScreenRecorder(https://github.com/MaartenBaert/ssr).
I’m not the site author, just submitting the link.
Not sure which part you need to be logged in to view - I’m seeing links to different articles and exercises and they are all visible without logging (I checked in an incognito window).
I have a list of learning resources for CLI tools and scripting here: https://learnbyexample.github.io/curated_resources/linux_cli_scripting.html
I’ve also written a few TUI interactive apps to practice text processing commands like grep, sed, awk, coreutils, etc: https://github.com/learnbyexample/TUI-apps
Why do you think it is a phishing link? Gumroad is a well known platform to sell digital goods.
I mention it is free up to some date because it will go back to being a paid product after that.
I started reading progression fantasy on Royal Road earlier this year (a site for posting web serials). Here’s my current follow list (excluding stories that are on hiatus):
Not my blog, just sharing it here.
That said, I don’t see that broken rectangle on Chromium.
Is it regex or sed/awk syntax (or both) that gives you trouble?
I had similar reaction and didn’t even try to learn them for years - then I caught the stackoverflow craze of answering CLI questions (and learning from others).
Already done grep, sed, coreutils, cli basics and more. See https://learnbyexample.github.io/learn_gnuawk/buy.html#book-list for links.