hellerbarde

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

mikermcneil

module.exports = {
  
  /**
   *
   * Using raw socket.io functionality from a Sails.js controller
   *
   */ 
   
  index: function (req,res) {

branneman

Better local require() paths for Node.js

Problem

When the directory structure of your Node.js application (not library!) has some depth, you end up with a lot of annoying relative paths in your require calls like:

const Article = require('../../../../app/models/article');

Those suck for maintenance and they're ugly.

Possible solutions

roachhd

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BrainFuck Programming Tutorial by: Katie

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INTRODUCTION

thegitfather

Vanilla JavaScript Quick Reference / Cheatsheet

Just migrated it from Codepen.io to markdown. Credit goes to David Conner.

Working with DOM	Working with JS	Working With Functions
Accessing Dom Elements	Add/Remove Array Item	Add Default Arguments to Function
Grab Children/Parent Node(s)	Add/Remove Object Properties	Throttle/Debounce Functions
Create DOM Elements	Conditionals

nguyenanhtu

How to test 'https' in XAMPP for localhost ? I will guide you

Menu

• Create certificate
• Config Apache to access https instead of http
• Config mod rewrite to generate SSL url
• Config Virtual host to test site

Step 1 : Create certificate

• Go to your XAMPP installation directory (in my case it’s E:\xampp), figure out apache folder. In this, find & run batch file

radutzan

Nuevo: SCLTransit

Ignacio Hermosilla implementó un servicio web de acceso público usando los feeds GTFS de Transantiago y los puntos de acceso oficiales que normalmente requieren acuerdos con el DTPM, para que tú no tengas que hacerlo.

Está toda la información de Transantiago que puedas necesitar, con formatos de alta calidad y sin trámites. Estas APIs son las que ahora alimentan a Cromi.

Revisa los endpoints y la documentación en scltrans.it

APIs internas de Transantiago (no recomendadas)

Transantiago implementó estas APIs para uso interno, por lo que no hay ninguna garantía sobre su funcionalidad, mantenimiento o futura existencia. Úsalas bajo tu propio riesgo. (Probablemente no es aconsejable que las uses para nada crítico.)

boneskull

Here's an example of how to debug Mocha v4 if it hangs.

Ensure you're using a Node.js 8 or newer (or any version with async_hooks support).

If you run your test, you'll notice it hangs:

$ mocha test.js

dmarcosl

// dependencies
// angular 8
// "firebase": "^7.6.1",
// "file-saver": "^2.0.2",
// "jszip": "^3.2.2"