ChandanChainani

git clone git://gist.github.com/3944262.git seven_langs_ruby
cd seven_langs_ruby
gem install gli -v 1.6.0
gem install showoff
showoff serve
open "http://localhost:9090"

ChandanChainani

#!/bin/bash

set -eo pipefail

aws route53 list-hosted-zones --query 'HostedZones[].Id' | \
  jq -r '.[]' | sed 's/\/hostedzone\///' \
| \
xargs -I zone_id \
  aws route53 list-resource-record-sets \
    --hosted-zone-id zone_id \

ChandanChainani

Simple Cowboy websocket app

Cowboy is such a simple web framework.
This is a sample websocket app.

new project

Use erlang.mk. Not that you have to, but it'd make things a bit easier.
First, create a folder for project, ex. myproject.
$ cd myproject/

ChandanChainani

#!/usr/bin/env python3

import os
import sys
from base64 import b64encode
from uuid import uuid4

try:
    from cryptography import x509
    from cryptography.hazmat.backends import default_backend

ChandanChainani

The repository for the assignment is public and Github does not allow the creation of private forks for public repositories.

The correct way of creating a private frok by duplicating the repo is documented here.

For this assignment the commands are:

1. Create a bare clone of the repository. (This is temporary and will be removed so just do it wherever.)

git clone --bare git@github.com:usi-systems/easytrace.git

ChandanChainani

// https://www.youtube.com/watch?v=wU6udHRIkcc

/*
Disjoint Set Union (“DSU”)  is the Data Structure: disjoint-set data structure 
is a data structure that keeps track of a set of elements partitioned into a 
number of disjoint (non-overlapping) subsets.

Union Find is the Algorithm: A union-find algorithm is an algorithm that can 
be used to detect cycles in an undirected graph & performs two useful operations
 on such a data structure:

ChandanChainani

#Model 

@user.should have(1).error_on(:username) # Checks whether there is an error in username 
@user.errors[:username].should include("can't be blank")  # check for the error message 

#Rendering
response.should render_template(:index)

#Redirecting 
response.should redirect_to(movies_path)

ChandanChainani

use std::str;

fn main() {
  // -- FROM: vec of chars --
  let src1: Vec<char> = vec!['j','{','"','i','m','m','y','"','}'];
  // to String
  let string1: String = src1.iter().collect::<String>();
  // to str
  let str1: &str = &src1.iter().collect::<String>();
  // to vec of byte

ChandanChainani

//Authorization popup window code
function ShowAuthWindow(options)
{
  console.log('ee');
    options.windowName = options.windowName ||  'ConnectWithOAuth'; // should not include space for IE
    options.windowOptions = options.windowOptions || 'location=0,status=0,width=800,height=400';
    options.callback = options.callback || function(){ window.location.reload(); };
    var that = this;
    console.log(options.path);
    that._oauthWindow = window.open(options.path, options.windowName, options.windowOptions);

ChandanChainani

Pry Cheat Sheet

• Youtube Tutorial 2013

Command Line

• pry -r ./config/app_init_file.rb - load your app into a pry session (look at the file loaded by config.ru)
• pry -r ./config/environment.rb - load your rails into a pry session

Debugger