ogero

Compilation of OpenCV & contrib modules from sources for Android

This process explains how to compile shared libs of opencv and contrib modules from sources for Android ABI abi-armeabi-v7a.

##Requirements

• Sources for opencv-3.4.1
• Sources for opencv_contrib-3.4.1
• CMake 3.11.3
• mingw-w64 x86_64-7.3.0-posix-seh-rt_v5-rev0

kimyvgy

Deploy nodejs app with gitlab.com and pm2

This manual is about setting up an automatic deploy workflow using nodejs, PM2, nginx and GitLab CI. It is tested on:

• Target server: Ubuntu 16.04 x64. This is suitable for Ubuntu 14.x.
• Windows 10 on my PC to work.

bspavel

//https://habr.com/post/213515/

// This works on all devices/browsers, and uses IndexedDBShim as a final fallback 
var indexedDB		= window.indexedDB || window.mozIndexedDB || window.webkitIndexedDB || window.msIndexedDB || window.shimIndexedDB,
	IDBTransaction  = window.IDBTransaction || window.webkitIDBTransaction || window.msIDBTransaction,
	baseName 	    = "baseName",
	storeName 	    = "storeName";

function logerr(err){
	console.log(err);

superjose

# Reference: https://www.exclamationlabs.com/blog/continuous-deployment-to-npm-using-gitlab-ci/

# GitLab uses docker in the background, so we need to specify the 
# image versions. This is useful because we're freely to use
# multiple node versions to work with it. They come from the docker
# repo.
# Uses NodeJS V 9.4.0
image: node:9.4.0

# And to cache them as well.

elclanrs

// Create a Promise that resolves after ms time
var timer = function(ms) {
  return new Promise(resolve => {
    setTimeout(resolve, ms);
  });
};

// Repeatedly generate a number starting
// from 0 after a random amount of time
var source = async function*() {

guettli

# Reliable persistent SSH-Tunnel via systemd (not autossh)
# https://gist.github.com/guettli/31242c61f00e365bbf5ed08d09cdc006#file-ssh-tunnel-service

[Unit]
Description=Tunnel for %i
After=network.target

[Service]
User=tunnel
ExecStart=/usr/bin/ssh -o "ExitOnForwardFailure yes" -o "ServerAliveInterval 60" -N tunnel@%i

Mohamed3on

1. Install prettier
2. Make a .prettierignore file, and add directories you'd like prettier to not format, for example: **/node_modules
3. Run prettier --write "**/*.js" *Don't forget the quotes.
4. Optional: if you want to format JSON/SCSS files too, replace js with json/scss.

ahmed-musallam

How to compress PDF using ghostscript

As a developer, it bothers me when someone sends me a large pdf file compared to the number of pages. Recently, I recieved a 12MB scanned document for just one letter-sized page... so I got to googlin, like I usually do, and found ghostscript!

to learn more abot ghostscript (gs): https://www.ghostscript.com/

What we are interested in, is the gs command line tool, which provides many options for manipulating PDF, but we are interested in compressign those large PDF's into small yet legible documents.

credit goes to this answer on askubuntu forum: https://askubuntu.com/questions/3382/reduce-filesize-of-a-scanned-pdf/3387#3387?newreg=bceddef8bc334e5b88bbfd17a6e7c4f9

posener

Story: Writing Scripts with Go

This is a story about how I tried to use Go for scripting. In this story, I’ll discuss the need for a Go script, how we would expect it to behave and the possible implementations; During the discussion I’ll deep dive to scripts, shells, and shebangs. Finally, we’ll discuss solutions that will make Go scripts work.

Why Go is good for scripting?

While python and bash are popular scripting languages, C, C++ and Java are not used for scripts at all, and some languages are somewhere in between.

AVGP

  var ffmpeg = require('ffmpeg.js/ffmpeg-mp4.js')

  document.querySelector('button').addEventListener('click', (evt) => {
    document.querySelector('[camera]').setAttribute('animation', {
      property: 'rotation',
      to: '0 360 0',
      dur: 10000,
      easing: 'linear'
    })