Luciano Mammino 𝕏 Node.js Design Patterns Profile picture
Aug 18, 2020 β€’ 7 tweets β€’ 2 min read β€’ Read on X
✨ Rob Pike's 5 Rules of #programming ✨

#golang #simplicity

πŸ§΅πŸ‘‡
1️⃣ You can't tell where a program is going to spend its time. Bottlenecks occur in surprising places, so don't try to second guess and put in a speed hack until you've proven that's where the bottleneck is.
2️⃣ Measure. Don't tune for speed until you've measured, and even then don't unless one part of the code overwhelms the rest.
3️⃣ Fancy algorithms are slow when n is small, and n is usually small. Fancy algorithms have big constants. Until you know that n is frequently going to be big, don't get fancy. (Even if n does get big, use Rule 2 first.)
4️⃣ Fancy algorithms are buggier than simple ones, and they're much harder to implement. Use simple algorithms as well as simple data structures.
5️⃣ Data dominates. If you've chosen the right data structures and organized things well, the algorithms will almost always be self-evident. Data structures, not algorithms, are central to programming.

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More from @loige

Sep 15, 2022
Here are 6 of my favorite third-party libraries when building CLI applications using #NodeJS

Want to know why?πŸ‘‡πŸ§΅
commander ➑️ npm.im/commander

Simple yet powerful command-line argument parser. It automatically generates help messages and can be configured to support multiple commands.

I ❀️ it bc it's not prescriptive, you can organize the code as you want (1 file or more).
conf ➑️ npm.im/conf

How many times did you have to store settings (creds & other preferences)? Where do you save the conf file? Which format do you use? How do you load and update the file?

Conf takes care of all of this (and more!) with an extremely simple API
Read 10 tweets
Aug 3, 2022
"Yo, why are #JavaScript and its ecosystem so messy?!" 😑

Well, I am glad you asked... Let me tell you a story! πŸ€“

πŸ§΅πŸ‘‡
For starting... #JavaScript was not designed to be the language that it is today!

JS was created in 1995 by @BrendanEich for Netscape, a web browser that was trying to come up with a language to make the web more interactive
@BrendanEich #JS wasn't related w/ #Java, so why did they call it Java-Script?! Duh! 😳

Java was trendy! it was possible to build interactive sites by embedding Java apps in pages (applets). So it was mostly a #mktg move: "JS: the lightweight Java alternative" or something like that I guess
Read 40 tweets
May 25, 2021
I have been confused for a while on what's the best way to implement a "to string" functionality for a #Rust struct. πŸ¦€

The reason why this has been confusing to me is that there are indeed many ways to do that and they all have different purposes!

This is what I learned

πŸ‘‡πŸ§΅
The first thing that you can do is to just implement a simple `to_string()` function directly on your struct!

play.rust-lang.org/?version=stabl…
This is easy and it works! But the implementation is very specific to our struct.

The rest of the codebase doesn't really know that this type can be converted to a String and therefore you cannot build abstractions on top of this... 🀨
Read 23 tweets
Oct 1, 2020
Do you know what's in a #JWT token?

Here's a quick thread to learn something about this! πŸ‘‡
A JWT token (JSON Web Token) is just a string with a well-defined format. A sample token might look like this:

```
eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJoZWxsbyI6ImZyb20gSldUIn0.XoByFQCJvii_iOTO4xlz23zXmb4yuzC3gqrWNt3EHrg
```
There are 3 parts separated by a `.` (dot) character:

- header: eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9
- body: eyJoZWxsbyI6ImZyb20gSldUIn0
- signature: XoByFQCJvii_iOTO4xlz23zXmb4yuzC3gqrWNt3EHrg
Read 13 tweets
Sep 17, 2020
@eleven_ty micro tip: Give eleventy some credit by injecting a "generator" meta tag in your HTML! πŸ”₯

Frontpage and Dreamweaver used to get credit this way, why shouldn't we give Eleventy some credit too? πŸ˜‡

(a short thread in 3 steps πŸ‘‡) Image
STEP 1. Create a data file in `_data/site.js` with the following content: Image
STEP 2. Create your base layout `_includes/layout.njk` and use the variable `{{ site.generator }}`: Image
Read 8 tweets
Aug 11, 2020
Software engineering #anxiety, let's talk about it. Specifically, let me try to deconstruct my personal anxiety

πŸ§΅πŸ‘‡
1️⃣ classic impostor syndrome: it doesn't matter how good I actually am with some technology/tool/technique. Even if I can get the job done, it still feels far from adequate and I feel like I have to rush to get better to defend my job title & credibility...
2️⃣ future tech gamble: tech is always changing and I need to be ready for the next big thing if I want to stay relevant in the market. But what is the next big thing? I don't know, of course, so I try to check out as many things as I can and often end up feeling overwhelmed! 🀯
Read 6 tweets

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