jayjariwala

sudo apt-get install finger
sudo apt-get install openssh-server openssh-client
change ssh port if necessary: /etc/ssh/sshd_condig
sudo adduser student

#Give Sudo Privilages to the new user 
visudo

# User privilege specification
newuser    ALL=(ALL:ALL) ALL

jayjariwala

sudo systemctl disable nginx
sudo systemctl enable nginx
sudo systemctl stop nginx
sudo systemctl start nginx
sudo systemctl restart nginx
sudo systemctl reload nginx

jayjariwala

#To check the current directory
pwd - remote system
lpwd - local system
cd, lcd

# Copy the file from remote to local
get filename

~from local to remote

jayjariwala

1) Create a droplet 
   You will recieve an email with root password information.
2) login using ssh though your local remote terminal (find your ipaddress on the digital ocean droplet control panel) or use ssh authentication
    ssh root@ipaddress 
    password:write from email
    change password upon first login
3) Once login as a root. update latest ubuntu packages 
    sudo apt-get install update
    sudo apt-get install upgrade
4) Add a non-root user with root previlagies 

jayjariwala

#Import into database
sudo mongoimport --db newdb --collection restaurants --file primer-dataset.json

#export database collection
sudo mongoexport --db newdb -c restaurants --out newdbexport.json

# Take backup 

create a folder regular backup folder 
sudo mkdir /var/backups/mongobackups

jayjariwala

// desgin inspiration https://dribbble.com/shots/2324994-Daily-UI-Day-14-Countdown-Timer/attachments/442297

(function(){

let focusSecs;
let breakSecs;
let timer;
let isPaused = false;
let pausedSecs = 0;

jayjariwala

You can think of clousre as a way of "remember" and continue to access a function's scope even once the function has finished running.

function makeAddr(x)
{
  //paraneter 'x' is an inner variable
  
  //inner function add() uses 'x', so it has clousre over it
  function add(y)
  {
    return x + y;

jayjariwala

Program state: the ability of a language to store value in a variable and later retrive or modify those values. In fact,
the ability store values and pull values out of variables is what gives a program state.

where do those variables live?
where are they store?
how does our program find them?

The set of rules for storing varibales in some location, and for finding those variables at a later time is called scope. 

In traditional compiled-language, a chunk of source code, your program , will undergo typically three steps before it is executed, roughly called "compilcation".

jayjariwala

This is not an author-time binding but a runtime binding.
this has nothing to do with where a function is declared, but has everthing to do with the manner in which the function is called.

when a function is invoked, an activation record, otherwise known as an exection context, is created.
it contains information about where the function was called from (the call-stack), how the function was invoked, what parameters where passed. etc.
one of the properties of this record is this reference, which will be used for the duration of that function's execution. 

To understand the this binding, we have to understand the call-site.

call site and call stack

jayjariwala

Objects

Syntax

Object come in two forms

1. the declarative form (litral)
2. Constrcted form

Declarative/litral Object