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Nick Taylor
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March 19th, 2021: What did you learn this week?

It's that time of the week again. So wonderful devs, what did you learn this week? It could be programming tips, career advice etc.

![Yoda wooping someone's butt](https://media.giphy.com/media/yDYAHbqe5DfyM/giphy.gif)

Feel free to comment with what you learnt and/or reference your TIL post to give it some more exposure.

#todayilearned

Summarize a concept that is new to you.

And remember, if something you learnt was a big win for you, then you know where to drop it as well.👇👇🏻👇🏼👇🏽👇🏾👇🏿

![Little kid making a fist as if to say "Yes!"](https://media.giphy.com/media/6brH8dM3zeMyA/giphy.gif)

Top comments (17)

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vonheikemen profile image
Heiker • Edited

Ooh. This one was interesting. This is a two part story.

1) So, zsh has a "vi-mode" built-in, and it turn out is not as useful in practice.

2) The bindkey command has an option -s that lets you map two key sequence.

Say I want to have a keymap, ctrl+x + s, to make zsh type sudo for me. This is how it goes.

bindkey -s '^xs' 'sudo'
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The ^ thingy, means ctrl. That would work. But it can be better, because you can have the "special" sequence in the other side too. We can get fancy.

bindkey -s '^xs' '^asudo ^e'
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^a means ctrl+a, so that would get you to the beginning of the line and type sudo for you. Then, ^e will get your cursor to the end of the line. I would say that works fine 95% of the time. The other 5%, is when the original position of the cursor wasn't the end of the line. Can we do better? Yes, remember the "vi-mode"? That works too.

Behold.

bindkey -s '^xs' '#^asudo ^x^vf#xi'
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  • #: Its literally #, nothing special here.

  • ^a: Go to the beginning of the line

  • sudo: You know it already.

  • ^x^v: Enter vi-cmd mode. That is ctrl+x + ctrl+v. Not the most intuitive thing in the world.

  • f#: Remember, we are in "vi-mode." In here the character f is a command, a search command. What does it search? The next character we type. So, this will search for a # and get the cursor to that position.

  • x: Deletes the character under the cursor, which should be #.

  • i: Get us back to insert mode.

And there you have it. Now you can use ctrl+x + s to add sudo to a command you're currently writing, and it will take you back to the place you started (that is of course if you don't any extra # in your command already).

While on the subject of crazy keybindings I present these.

bindkey -s '^xf' '#^e | fzf^x^vF#xi'
bindkey -s '^xp' '#^e | less^x^vF#xi'
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You can guess what they do.

EDIT: By the way, fish users already have something like these. I believe Alt+p will add | less to your command. Don't remember what others they have.

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Nick Taylor

Hot Rod saying Cool beans!

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🚩 Atul Prajapati 🇮🇳
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Nick Taylor

Nice!

Actor from Game of Thrones saying Nice!

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🚩 Atul Prajapati 🇮🇳

Thank you nick ;)

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peter279k

I learn how to use the Python requests, BeautifulSoup to complete a auto filled scheduler and help me to fill working schedule time automatically 😃.

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Nick Taylor

A bowl of soup with the pun at the bottom of the image “Feeling Soup-er”

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Andrew Brown 🇨🇦

doppleganger node packages. I was creating a UI Kit and mithrilj s was getting loaded twice causing lots of things in my app to break.

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Nick Taylor

Oof.

One of the Wiggles waving to themselves

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Maureen T'O

Honestly, getting events and props into my head after months of learning my favourite framework 😅🥳

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Nick Taylor

That's awesome! 🔥

Yes, that's awesome!

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Mathieu Huot

Aaah, beautiful Montreal! (off topic)

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Nick Taylor

It's True - Dwight Shrute

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Kirk Shillingford

Solving coding challenges with parser combinators!

github.com/tkshill/protein-transla...

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Nick Taylor

Awesome!

Hackerman from Kung Fury putting on a Nintendo Power glove

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Nick Taylor

The More You Know NBC TV campaign video capture