Hiweus

Problems i faced with JEST

Jest slow on WSL2

I moved my project from Windows Desktop to Linux Home and the tests became faster.

Jest not watching file changes on WSL2

This is related to watchman and inotify, i just moved my project from Windows Desktop to Linux home and watch mode start to work. This ocours because inotify doesn't work correctly ousite a linux file system. Issue Here

Hiweus

Watch mode scripts npm

Sometimes packages like Nodemon, Mocha who watch changes on files to perform some actions doesnt work correctly 🤕.

All these packages use CHOKIDAR library to watch file changes, to fix this behaviour on chokidar set environment variable CHOKIDAR_USEPOLLING=true.

# Linux

Hiweus

Calc distance

SQL Server function to calc distance between two coordinates

create FUNCTION [dbo].[fncCalcula_Distancia_Coordenada](
                                                   @decLat1Deg DECIMAL(9,6), -- First latitude in degrees.
                                                   @decLon1Deg DECIMAL(9,6), -- First longitude in degrees.
                                                   @decLat2Deg DECIMAL(9,6), -- Second latitude in degrees.

Hiweus

Configure mocha to watch typescript files

When you use mocha with flag --watch on typescript you need to set .mocharc.json file on root folder of project to specify for mocha watch .ts files; Otherwise the terminal will spawn in the first run but will not restart when you save the file.

// .mocharc.json
{
    "extension": [
 "ts"

Hiweus

Configure multiple ssh keys on machine

For this project i will use github as example. I have two keys id_rsa and personal_rsa.

First of all you need to create file ~/.ssh/config. Inside the file put content as follow and edit as your need

# Default configuration (ask for password if there's no key in config file)
Host *
IdentitiesOnly yes

Hiweus

This script below get a path to one video and stream using php, this is possible because the Range header field. If the browser doesn't allow this header the script only drop all video on response.

<?php
  function streamVideo($path) {
      $fileInfo = pathinfo($path);
      header("Content-Disposition: inline; filename=\"{$fileInfo['basename']}\"");
      if(!isset(getallheaders()['Range'])) {
          echo file_get_contents($path);