The good parts for humans

(part 2)

B Anjaneyulu Reddy

Email: anji.t6@gmail.com

Twitter: @_anji

Evibe.in

JavaScript

Agenda

Day 1 revisit

Introduction to Functions

Day 1 revisit

Reserved keywords - ECMAScript 5

JSON recommendation

FPS quesiton

What are the falsy values?

Global abatement

Prototypal inheritance

Functions (1 of 2)

What is a function?

Function are objects in JS

• stored in variables, objects, arrays

• passed as arguments to functions

• functions can be returned from functions

• functions can have methods

Hidden properties

o Function.prototype

o function's context

o code that implements function's behaviour

functionObject.prototype

functions are invoked

Functions (2 of 2)• Function literal

o Four parts

function keyword

optional function name

• used for self calls

parameters

body of the function - set of statements

o can be defined in another function

• this, arguments

• Function Invocation: invocation operator - expression(a, b, ...)

o differ in what this is assigned to

o four patterns

function form

method form

constructor form

apply form

Questions?

Thank You