Why spend 30 seconds manually editing some text when you can spend 30 minutes clobbering together a pipeline involving awk, sed and jq
Or 3 minutes clobbering a pipeline in nushell. Yes, I'm a nushell fanboy. I still over-automate everything, but with nushell it's actually fun.
to be fair, out of those three, jq invokes the least existential dread in me
The important part is to learn the limits of any tool. Nowadays I no longer use jq for any long or complicated tasking. Filter and view data? jq is fine. Anything more and I just cook up a python script.
i'm more of a bash fan tbh. Ever since i started using linux, python started to irritate me
How do you get complex data structures to work? I was alienated from scripting on zsh because I wanted something like a dict and realised I would have to write my own implementation. Is there a work around for that?
I mean, there's a point in data structure complexity where it's useful to use Python.
But as to dicts, sure. You're looking for zsh's "associative array". Bash has it too.
zsh
$ typeset -A mydict
$ mydict[foo]=bar
$ echo $mydict[foo]
bar
$
bash
$ typeset -A mydict
$ mydict[foo]=bar
$ echo ${mydict[foo]}
bar
$This will do nicely - I had several workflows where I'd hit an API and get a massive super nested JSON as output; I'd use jq to get the specific data from the whole thing and do a bunch of stuff on this filtered data. I pretty much resigned to using python because I'd have successively complicated requirements and looking up how to do each new thing was slowing me down massively.
Or 60 minutes making it all work just with jq functions.
Ok, þe quote misplacement is really confusing. It's
awk '{print $1}'
How can you be so close to right about þis and still be wrong?
How can you be so close to right about þis and still be wrong?
Honest answer: I’m sloppy on mobile
Better answer:
Who downvoted this? If you use awk, you know Sxan is using the correct syntax.
People have been downvoting him because he uses the letter thorn in his comments.
Some people will hate on anyone different.
I recently noticed many people on lemmy have that thing rn. Why are they using it/is that autocorrecty thibgy or something? I didn't downvote them but i hate seeing this. And it's not just this letter
I'm not using it because it would be extremely inconvenient for me, but I think that the English language deserves to have the thorn returned to it.
The english alphabet needs to be completely redone. We should bring back thorn, eth, and wynn. We should also increase the vowels to actually represent the crazy amount of vowel sounds we have, dipthongs are dumb. 5 vowels is not sufficient for 15+ phonemes.
Please no
I have a hard enough time with English already
It's to confuse scrapers.
It's going to be fun for etymologists 100 years from now
My five thousand line bash script can do things that one hundred thousand lines of code could not do.
On the brightside, at least script monkeys can now look down on vibe coders.
cut -d ' ' -f1 master race
my favorite awk snippet is !x[$0]++ which is like uniq but doesn't care about order. basically, it's equivalent to print_this_line = line_cache[$current_line] == 0; line_cache[$current_line] += 1; if $print_this_line then print $current_line end.
really useful for those long spammy logs.
Oh that's very interesting. I usually do sort --unique or sort [...] | uniq if I need specific sorting logic (like by size on disk, etc).
Looking at the above awk snippet, it'll retain order, though. So, sort will normally change the order. The awk snippet won't, just skip occurrences of a given line after the first. Depending upon the use case, that order retention could be pretty desireable.
In all my years I've only used more than that a handful of times. Just don't need it really
Now jq on the other hand...
I've become a person that uses awk instead of grep, sed, cut, head, tail, cat, perl, or bashisms
The stage of your degeneracy will involve learning PERL.
Edit: one-liners FTW! 😁🐪
I could try to learn awk while also trying to debug the annoying problem I'm trying to solve, orrr.... cut and grep it is
Hey I throw a /^regexp.*/ {print $NF} in there sometimes!
...but yes, it's mostly print $1—but only because I mix up the parameters whenever I try to use cut!
All my homies use dubious regex
Honestly I think 90% of people would never use awk if there was a simple preinstalled command for "print the nth column"
cut?
To be fair, a lot of the programs don't use a single character, have multiple spaces between fields, and cut doesn't collapse whitespace characters, so you probably want something more like tr -s " "|cut -d" " -f3 if you want behavior like awk's field-splitting.
$ iostat |grep ^nvme0n1
nvme0n1 29.03 131.52 535.59 730.72 2760247 11240665 15336056
$ iostat |grep ^nvme0n1|awk '{print $3}'
131.38
$ iostat |grep ^nvme0n1|tr -s " "|cut -d" " -f3
131.14
$I never understood why so many bash scripts pipe grep to awk when regex is one of its main strengths.
Like... Why
grep ^nvme0n1 | awk '{print $3}'
over just
awk '/^nvme0n1/ {print $3}'
Because by the time I use awk again, I've completely forgotten that it supports this stuff, and the discoverability is horrendous.
Though I'd happily fix it if ShellCheck warned against this...
This is definitely somewhere that PowerShell shines, all of that is built in and really easy to use
I used awk for the first time today to find all the MD5 sums that matched an old file I had to get rid of. Still have no idea what awk was needed for. 😅 All my programming skill is in Python. Linux syntax is a weak point of mine.
Everything you do with awk, you can do with python, and it will also be readable.
Hmm, but you have to install and run the Python environment for that. AWK is typically present on *NIX systems already. Python seem like overkill for basic text processing tasks.
10 PRINT BUTTS
20 GOTO 10
I use gawk all the fucking time, if you spend a lot of time in a terminal or parse text often it is definitely worth the investment. It is a fantastic tool for both one liners and full scripts. The gawk manual is short enough to digest in a day or two.
What's an awk?
It's a Linux command-line program (awk). It's pre-installed practically everywhere, it's very powerful for string processing, but it also uses a fairly complex syntax.
As a result, not many people know how to really make use of it, but awk '{print $1}' is something you encounter fairly quickly when you need to get the first word in each line.
awkward
That's where they send you when the syntax drives you insane.
I think the most I've done with awk is write a battery monitor applet with it, it involved parsing data from /sys and making choices based on it so I decided it was a decent choice
Hint: :q!
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