Vim: How to Start Using The Text Editor for Developers
Computer Science at Buenos Aires University. Data Scientist at MercadoLibre. Loves Python.
Typing faster is just not scalable enough. Source: Pixabay
To some, Vim is a beautiful relic from the past. To others, it’s that annoying thing you have to escape whenever you need to write a message for a merge commit.
so that we can get started!
First steps: navigating, editing and exiting.
Whenever you open Vim on a file, there are three basic things you may want to do:
Reading the file’s contentsWriting on the fileQuitting the programNavigation
To navigate a file on Vim, use the letters h,j,k, and l. These commands are called motions, as they move the cursor.
The keys h and l will move your cursor horizontally (one character at a time), while j and k move vertically (one line at a time). If you put your hand on them, the layout sorta makes sense.
Some people have trouble remembering which key goes up and which goes down. Pro tip: j sorta looks like a downwards pointing arrow.
As a general note, it is considered bad practice -even though it’s possible- to use the arrow keys for moving in Vim. Get used to using hjkl, and I promise you’ll see a significant boost in speed.
Once you’re confident moving through a file one character or line at a time, try pressing a number (any number, it could have many digits) before moving. You’ll jump as many times as the number you entered.
This is a very powerful concept in Vim: Repetition. Have you ever found yourself editing a text file and doing the same thing over and over? Especially something very mundane, like deleting quotes and replacing them with commas? Vim’s got you covered: Just do the thing once, and press . to repeat it. Enter a number and press . again if you want to repeat it as many times.
Moving around in a text file and reading what’s in it is good and all, but what if we need to change some of its contents? Do not despair, editing a file is as easy as pressing the i key. That will move you from normal mode into editing mode.
Most Vim commands will only be available on normal mode, and entering editing mode is usually frowned upon, and should be avoided as much as possible. However, when entering editing mode, Vim will be like any other Text Editor (with Syntax Highlighting on), making its functionalities a superset of those available in your typical notepad.
To exit editing mode, press the ESC key.
To quit Vim, enter normal mode, and press :wq if you want to save your changes (write and quit), or q! if you want to leave without saving.
More commands: Actually useful features.
Editing files from the terminal might make you look like a cool hacker or something, but why should we use this text-based program instead of good old Sublime Text? The answer is commands.
A thousand ways of deleting text
Want to delete part of your file? You could enter editing mode and press backspace once for every character. It doesn’t really beat using Sublime and pressing ctrl+shift+left to select a whole word before deleting it.
If you really want to harness the power of Vim, you should try pressing the d key. Pressed once, it won’t do anything. But it’s not sitting idle, it is actually expectant, waiting for an order. Pass it a motion like the ones we learned today (l, 5j, whichever you feel like really) and it will gobble those characters up. For instance, dNl for any number N, will delete the following N letters from the cursor.
Introducing new motions e : Moves the cursor to the end of the current word (defined as a concatenation of letters, numbers and underscores).w : Moves it to the beginning of the next word.
So if I have this text:
And my cursor is standing on the H. When I press de in normal mode, the line will end up looking like this:
While using dw will leave it like this:
Notice how in the second example, there’s no space before ‘there’.
We could then press i to insert some replacement word after deleting ‘Hello’. Luckily, there’s an even more fluid way of doing that: the c command (for change). Pressing c and a motion is exactly equivalent to pressing d+motion+i.
This is starting to look nicer, but it still doesn’t beat pressing shift+home/end and deleting a whole line in a few keystrokes, right? Well I see that, and raise you to the $ and 0 motions.
0: moves the cursor to the first character in the current line.$: moves the cursor to the last character in the line.
There’s an even faster way of deleting the whole current line though: dd.
And if you want to delete many lines? dxd deletes the x following lines.
Generally useful Vim commands
By now, the usefulness of vim when editing code (and just code — I wouldn’t encourage you to use vim for other text editing) should start to become apparent.
A few other commands you may want to check out are:
o and O: create a new line above or below the current one, respectively, and enter editing mode.
v : enter visual mode to select text to which you may then apply more commands.
y or Y: yank (copy) the selected text, or the current line, respectively.
p : put the yanked content. Notice that yanking will move text to a special Vim reserved buffer, and not to your usual clipboard. This way, you can effectively manage two different clipboards! One you can paste from with ctrl+shift+v as usual (in editing mode), and the other with p (in normal mode).
* : find the next occurrence of the current word.
When writing software, I find myself duplicating lines to change a few words quite often, so I think Yp is an amazing command.
I’ve barely scratched the surface with this introduction, but I hope I’ll at least have persuaded you into trying Vim out for yourself. It may not replace an IDE if you’re coding in Java or C++, especially if you’re using Frameworks and auto-complete is helping you. But when coding in C or Python, I usually pick it as my editor of choice. And sometimes when I need to transform a string quickly, editing it from Vim is faster than coding a script in Bash or Python.
If you want to learn more, let me know, as I’ll probably keep coming back to this as a series. But I also encourage you to try the software on your own, and run the vimtutor
program from your shell (it usually comes preinstalled with Linux and on Macs). If you want to really learn how to optimize your Vim use after going through vimtutor, this very geeky, very awesome site
may be of interest to you as well.
I hope you found this article useful or interesting, and as usual any feedback will be welcome, whether anything I said was plain wrong, or you actually liked some part of this tutorial.
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