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@kbariotis
kbariotis / main.yaml
Last active November 27, 2023 21:02
Ansible playbook for deploying a Node.js app to DigitalOcean
- name: DO
hosts: localhost
vars:
project_name: "PUT A NAME FOR YOUR PROJECT HERE"
do_token: "PUT YOUR DIGITAL OCEAN API KEY HERE ==> https://cloud.digitalocean.com/settings/api/tokens"
repository: "PUT YOUR REPOSITORY URL HERE"
tasks:
- name: LOCAL | Generate SSH key
shell: ssh-keygen -b 2048 -t rsa -f ~/.ssh/{{project_name}} -q -N ""
@gunjanpatel
gunjanpatel / revert-a-commit.md
Last active July 5, 2024 06:54
Git HowTo: revert a commit already pushed to a remote repository

Revert the full commit

Sometimes you may want to undo a whole commit with all changes. Instead of going through all the changes manually, you can simply tell git to revert a commit, which does not even have to be the last one. Reverting a commit means to create a new commit that undoes all changes that were made in the bad commit. Just like above, the bad commit remains there, but it no longer affects the the current master and any future commits on top of it.

git revert {commit_id}

About History Rewriting

Delete the last commit

Deleting the last commit is the easiest case. Let's say we have a remote origin with branch master that currently points to commit dd61ab32. We want to remove the top commit. Translated to git terminology, we want to force the master branch of the origin remote repository to the parent of dd61ab32:

@vasanthk
vasanthk / System Design.md
Last active July 8, 2024 02:37
System Design Cheatsheet

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

  1. Clarify and agree on the scope of the system
  • User cases (description of sequences of events that, taken together, lead to a system doing something useful)
    • Who is going to use it?
    • How are they going to use it?
@PurpleBooth
PurpleBooth / README-Template.md
Last active July 6, 2024 04:11
A template to make good README.md

Project Title

One Paragraph of project description goes here

Getting Started

These instructions will get you a copy of the project up and running on your local machine for development and testing purposes. See deployment for notes on how to deploy the project on a live system.

Prerequisites

@bracki
bracki / TimedJsonWebSignatureSerializer.py
Last active May 1, 2018 22:21
A TimedJsonWebSignatureSerializer that checks for http://self-issued.info/docs/draft-ietf-oauth-json-web-token.html#expDef. A bit like the TimedSerializer, but with self contained expiry time.
from itsdangerous import JSONWebSignatureSerializer, BadSignature, SignatureExpired
import calendar
import datetime
class TimedJSONWebSignatureSerializer(JSONWebSignatureSerializer):
EXPIRES_IN_AN_HOUR = 3600
def __init__(self, secret_key, salt=None, serializer=None, signer=None, signer_kwargs=None, algorithm_name=None, expires_in=None):
@domenic
domenic / promises.md
Last active June 24, 2024 03:11
You're Missing the Point of Promises

This article has been given a more permanent home on my blog. Also, since it was first written, the development of the Promises/A+ specification has made the original emphasis on Promises/A seem somewhat outdated.

You're Missing the Point of Promises

Promises are a software abstraction that makes working with asynchronous operations much more pleasant. In the most basic definition, your code will move from continuation-passing style:

getTweetsFor("domenic", function (err, results) {
 // the rest of your code goes here.