ninjascribble

/** Native NodeJS */
var http = require('http')
  , server = http.createServer(function(req) {
        console.log(req.headers['user-agent']);
    });

server.listen(3000, 'localhost');

/** NodeJS with Express */
var express = require('express')

gitaarik

Git Submodules basic explanation

Why submodules?

In Git you can add a submodule to a repository. This is basically a repository embedded in your main repository. This can be very useful. A couple of usecases of submodules:

• Separate big codebases into multiple repositories.

msrose

Combining two git repositories

Use case: You have repository A with remote location rA, and repository B (which may or may not have remote location rB). You want to do one of two things:

• preserve all commits of both repositories, but replace everything from A with the contents of B, and use rA as your remote location
• actually combine the two repositories, as if they are two branches that you want to merge, using rA as the remote location

NB: Check out git subtree/git submodule and this Stack Overflow question before going through the steps below. This gist is just a record of how I solved this problem on my own one day.

Before starting, make sure your local and remote repositories are up-to-date with all changes you need. The following steps use the general idea of changing the remote origin and renaming the local master branch of one of the repos in order to combine the two master branches.

paulirish

Option 1: Command-line download extension as zip and extract

extension_id=jifpbeccnghkjeaalbbjmodiffmgedin   # change this ID
curl -L -o "$extension_id.zip" "https://clients2.google.com/service/update2/crx?response=redirect&os=mac&arch=x86-64&nacl_arch=x86-64&prod=chromecrx&prodchannel=stable&prodversion=44.0.2403.130&x=id%3D$extension_id%26uc" 
unzip -d "$extension_id-source" "$extension_id.zip"

Thx to crxviewer for the magic download URL.

d2s

Installing Node.js with nvm to Linux & macOS & WSL

A quick guide on how to setup Node.js development environment.

Install nvm for managing Node.js versions

nvm allows installing several versions of Node.js to the same system. Sometimes applications require a certain versions of Node.js to work. Having the flexibility of using specific versions can help.

1. Open new Terminal window.

amoutonbrady

1. Go into VSCode
2. Install typescript npm i typescriptfor local OR npm i -g typescript for global
3. Run either node_modules/.bin/tsc --init for local installation or tsc --init for global
4. Open the generated file tsconfig.json and press CTRL+F
5. Make sure to tick the regex filter for search on the far right of the search input (third icon)
6. Pase that regex \s* \/\* .* \*\/
7. Replace by "nothing"

ivanbrennan

# create/update resources
kubectl --context=minikube apply -f ./postgres.yaml

# In order for the service to reach the statefulset, the following should
# be true:
#   statefulset.spec.selector.matchLabels.app  == service.spec.selector.app
#   statefulset.spec.selector.matchLabels.role == service.spec.selector.role

# give the server some time to start up
# ...

iamchrissmith

To evaluate the value of msg.sender when using solidity/assembly's delegatecall:

We start out with 3 contracts:

pragma solidity ^0.5.7;

contract ScratchPadActions {
    event SenderActions(address contractAddress, address sender, address second);
    function relay(ScratchPad2 second) public returns (address) { 
        emit SenderActions(address(this), msg.sender, address(second));

nuga99

#!/bin/sh
# From https://www.hiroom2.com/2017/09/24/parrotsec-3-8-docker-engine-en/

# Changelog: 
# @DavoedM: Apr 3, 2020
# @C922A10971734: Jan 19, 2023

set -e

# Install dependencies.

mushonnip

import uuid

class Booking(models.Model):
  booking_no = models.CharField(primary_key=True, default=uuid.uuid4().hex[:5].upper(), max_length=50, editable=False)
  
  def __str__(self):
    return str(self.booking_no)