Jonathan Palardy's blog

(Update 2020-03-01: there’s a better way to do this, see below) Situation You’ve been working on a (Git) branch and you need to generate the list of files modified on that branch.

Bulgarian Translation, thanks to Zlatan.

I have read many books in 2019; let’s forget most and talk about the good ones.

If you think the answer is: The exec() family of functions replaces the current process image with a new process image. you are only partially right… That’s only true if you don’t redirect: Redirections are a special case, and exec does not destroy the cu…

Another linter?

Why QR codes?

There are multiple scenarios where removing empty lines might be necessary: reformatting source code cleaning up some data simplifying command-line output … but what’s the easiest way of automating this?

Go is, mostly, a straightforward and unsurprising language.

Azerbaijanian Translation, thanks to Amir.

tmux can send the text you type to multiple panes: (screenshot source) Even though I’ve used tmux for years, I never realized that it could do that until my colleague (thanks @laurence_man!)

When software stops running, it produces an exit code.

Vim is fast, that’s one of its main selling points.

I have read many books in 2018; some good and some not so good.

I was reading Impatient JS and came up on a surprising part: > ...['👨‍👩‍👦'] [ '👨', '‍', '👩', '‍', '👦' ] // cool: man, woman, and boy emojis... but when my friend Jordan tried it: > [...'👪'] [ '👪' ] What… why?!

Prettier is an awesome code formatter.

In large projects, the way files depend on each other is not always clear.

The chances to find a JavaScript project with all dependencies correct and up-to-date is almost zero.

This isn’t your code or project: you git clone and step into the directory… Where do you start?

The Data I’ve been keeping track of what I read for years.

Who is this for?

Why?

I have read many books in 2017, but it wasn’t all good.

MySQL without the Mess Sometimes, I need MySQL1 but: I don’t want to install MySQL on macOS (homebrew or otherwise).

A summary statistic is what you get when you reduce a bunch of numbers down to a single number: # the heights of 10 people you know (cm): 180 175 165 176 183 173 186 175 180 181 # the "average" of those heights: 177.4 But it doesn’t have to be the mean,…

The first thing you type on a command-line is either an alias, a function or a command.

Over the years, I’ve seen many people use this pattern (filter-map): $ [data is generated] | grep something | awk '{print $2}' but it can be shortened to: $ [data is generated] | awk '/something/ {print $2}' You (probably) don’t need grep Following this l…

When I migrated a droplet from Ubuntu 14.04 to 16.04, the tutorials clearly implied that I should use UFW.

Problem $ cat broken.json { "color": "red" } { "color": "green" { "color": "blue" } There’s a missing } after green. $ cat broken.json | jq . { "color": "red" } parse error: Expected separator between values at line 6, column 1 When jq hits invalid JSON,…

It all started with this banner; a course recommendation on Coursera: How can you say “no” to that?

Mac software is setup to receive files in ~/Downloads.

Does this look familiar?

I have read many books in 2016, but it wasn’t all good.

Russian Translation, thanks to Angelina.

This is a wrap-up of my AWK tutorial series.

I already mentioned why you should learn AWK.

I already mentioned why you should learn AWK.

I already mentioned why you should learn AWK.

Because of the arcane syntax?

Update (November 12, 2021): Apparently, I’m not the only person who has ever stumbled into this problem and wondered if there was a better way.

I have read many books in 2015, but it wasn’t all good.

I used to run Postfix and have it send my emails through Mailgun, mostly for the reasons explained in The Hostile Email Landscape.

Shuffling How do you shuffle on the command-line?

Let’s say you want to improve cd: after cd, print the current directory given a filename, cd to the directory containing the file Here’s something that won’t work: cd() { # check if path is a file, etc cd "$dest" # print pwd } The problem is that cd…

Russian Translation, thanks to Vlad.

It felt like a command-line blind spot: is it possible to invert a glob?

Swedish Translation, thanks to Eric.

Have you ever done this?

I mentioned previously that which -a is what you want to use to find what command you’re about to run.

Here’s a problem: $ grep something file If you’re going to search for different strings, repeatedly, what you really want is for “something” to be the last argument.

I write software for myself.