Abhinay-g

 >Intorduction 
 This module will consist of following 
 1) methods, Filters and Operators for Reading Data
 2) query selector
 3) Projection operator
 
 >Operators
 All command include a db.collectionName.MethodName({-parameter-})
 parameter can be key value pair or it could be a Range 
 db.collectionName.MethodName({key:{$operator:value}})

Abhinay-g

> Introduction 
This module based on data creating , Data can be crated on mongodb , or it can be imported from other source 
We will learn about insert method and different ways of importing data into mongo DB 

> Insert methods 
ther eare 3 mthods 
  1 ) insertOne({}) this will take one documetns 
  2 ) insertMany({}) this tail ltake multiple documents 
  3 ) insert() It takes both single/ multiple documents 

Abhinay-g

> Introductions
when working with project we need to find what kind of structure of our data, what will be ralation between our data
We will udnerstand ducuments and other types of data 
we a will also look into diffreent type of relation, And we will Validate the Data [Schema validation]

>Schema 
Mongo DB supposed to be a schemaless DB but why there is a schema, well MongoDB do not enforce schema as 
it is enforced by RELATIONAL database. hance creating a schema is an option and as per developers need
It is totally developer oriented we can follow any approch, we can forefully insert value by assigninign 
null to that extra field

Abhinay-g

> intorductioon 
mongod is a database server , this should be up and running 
mongod --port = PORT will be running mongo server on perticular server
mongo is a mongoDB shell , this is used to do all mongo operation , thought we haave DRIVERS for all kind of platform

Shell command are almost similar as JAVAscript driver for nodejs 

show dbs > show databases 
use DataBase_name > create a database
db.collectionName.insertOne({JSON_Document}) > create a collection and inserting a document into it

Abhinay-g

> Why agnular forms :
Angualr form gives key-value object of a form which can be used for multiple purpose .
Agnular also give a metadata related to forms.
In traditional HTML form we have action="somefunction()" and method="get!post" , but when we use it with angular we do not specify 
anything to angular, angular itself treat <form> as some kind of directive|compoenent and act on it using formsModule.

> Types of angular forms
Template Driven From : in this template is fixed and form element is accessed on TS {So angular infer form from DOM side}
Reactive Form        : in this form configuration is done on TS file Also on TEMPLATE side {form created dynamically and synced with DOM}

Abhinay-g

>Services 

Services are used to share common logic among set ot multiple component.
So a Service can containe a buisness logic or it can containe call to API
Services can be used for [logging], for [Data storage].

>Adding service
To added service we need to load the service into constructor and to Providers array in @Component({}) directive

>Hirachical Injector

Abhinay-g

>introduction Directive
Attribute       and Structural directive
[No Dom change]    [Dom Change]

Why cant we add multiple directive on same element like we can not use ngIf and ngFor on same element
> Gettting started with Directive
create a class with @Directive Devorator and [selector] as a paramter to decorator
using elementRef to change to style of an element 

Note: Remember changing element style using [element.nativeElement.style.backgrroundColor] may not be available because Angular can render 

Abhinay-g

> property and event binding 
In angular property and event binding is used to transfer data acreoss compoenent 
This is the best approch for transferring data 
if sender and reciever compomenet are very far then we can use observable seream using a data sharing service
@input() and @output() property decorators are used to pass data arround

> View Encapsulation 

In angular a compoenent is associated with a SCSS file which is very specefic to that acompoenent . 
but commmon CSS behaviour does not work like that It apply CSS to all element of that file.

Abhinay-g

using System; 
using System.Collections.Generic;
class MyClass {

      static void Main(string[] args) { 
       string[] ip = Console.ReadLine().Trim().Split(' ');
       long a = Convert.ToInt64(ip[0]);
       long b = Convert.ToInt64(ip[1]);
       Console.Write(commDiv(a,b)); 
       

Abhinay-g

Debris:Construction Debris
Caddies: Someone who lift golf bag, kind of helper
Wager: synonym for bet
Sprawls:  Land spred arround
Debilitate : makeing someone weak [many hard drungs are debilitating society ]