Bhupesh Varshney Bhupesh-V

Blog posts

Quora

ServiceWorker for github pages

This is a ServiceWorker template to turn small github pages into offline ready app.

Why ?

Whenever I make small tools & toys, I create github repo and make a demo page using github pages (like this one).
Often these "apps" are just an index.html file with all the nessesary CSS and JavaScript in it (or maybe 2-3 html/css/js files). I wanted to cache these files so that I can access my tools offline as well.

Notes

Make sure your github pages have HTTPS enforced, you can check Settings > GitHub Pages > Enforce HTTPS of your repository.

System Design Cheatsheet

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

Basic Steps

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?

Using Git to Manage a Live Web Site

Overview

As a freelancer, I build a lot of web sites. That's a lot of code changes to track. Thankfully, a Git-enabled workflow with proper branching makes short work of project tracking. I can easily see development features in branches as well as a snapshot of the sites' production code. A nice addition to that workflow is that ability to use Git to push updates to any of the various sites I work on while committing changes.

DHT Walkthrough Notes

I've put together these notes as I read about DHT's in depth and then learned how the libtorrent implementation based on the Kademlia paper actually works.

What problem does this solve?

400,000,000,000 (400 billion stars), that's a 4 followed by 11 zeros. The number of atoms in the universe is estimated to be around 10^82. A DHT with keys of 160 bits, can have 2^160 possible numbers, which is around 10^48

	package utils

	import (
	"runtime"

	"github.com/Sirupsen/logrus"
	)

	// DecorateRuntimeContext appends line, file and function context to the logger
	func DecorateRuntimeContext(logger logrus.Entry) logrus.Entry {


Summary	How to control (or Understand) your GIST page's files list order.
Notice	not official documentation.

	#!/usr/bin/python

	import os
	import errno
	import sqlite3
	import sys
	from time import time
	from cPickle import loads, dumps

	import logging

	[alias]
	recent = "!git for-each-ref --sort=-committerdate refs/heads/ --format='%(committerdate:short) %(refname:short)' \| head -n 10"
	co = checkout
	cob = checkout -b
	coo = !git fetch && git checkout
	br = branch
	brd = branch -d
	brD = branch -D
	merged = branch --merged
	st = status

	#!/bin/bash

	function workspace_cd() {
	cd $@ && [ -f ".workspace" ] && source .workspace
	}

	alias cd="workspace_cd"