JSON so what is JSON? JSON stands for JavaScript Object Notation
JSON so what is JSON? JSON stands for JavaScript Object Notation

and it is a data of representation format it's used for transferring data
and it is a data of representation format it's used for transferring data

between server and clients and also for configuration files JSON serves the same
between server and clients and also for configuration files JSON serves the same

purpose as XML but it has a lot of advantages over XML so why use JSON JSON
purpose as XML but it has a lot of advantages over XML so why use JSON JSON

is lightweight so it's easier to get and load data very quickly it's also
is lightweight so it's easier to get and load data very quickly it's also

scalable JSON actually is language independent which means it can work with
scalable JSON actually is language independent which means it can work with

most of our modern programming languages actually my first experience with JSON
most of our modern programming languages actually my first experience with JSON

was not within a JavaScript program it was actually using C# API the nice
was not within a JavaScript program it was actually using C# API the nice

thing about it being scalable is that if you have server code and it's always
thing about it being scalable is that if you have server code and it's always

writing out JSON it doesn't matter if you change your server from being a
writing out JSON it doesn't matter if you change your server from being a

C# web API to some type of Java API it
C# web API to some type of Java API it

doesn't matter as long as you're still giving back the same JSON message
doesn't matter as long as you're still giving back the same JSON message

finally it has a standard structure and the nice thing about it having a
finally it has a standard structure and the nice thing about it having a

standard structure is that it's really easy to read and write the code so let's
standard structure is that it's really easy to read and write the code so let's

look at the differences between JSON and XML one side you can see that I have
look at the differences between JSON and XML one side you can see that I have

JSON for cats this is an array of the object cat and on the other side is our
JSON for cats this is an array of the object cat and on the other side is our

XML code you can see that there's significantly less tags in the JSON and
XML code you can see that there's significantly less tags in the JSON and

you can really just clearly see that JSON is more lightweight compared to XML
you can really just clearly see that JSON is more lightweight compared to XML

and on top of that JSON has the concept of arrays. Which is not available in XML.
and on top of that JSON has the concept of arrays. Which is not available in XML.

Actually here I'm illustrating a couple different types in JSON I have a number
Actually here I'm illustrating a couple different types in JSON I have a number

type a string an object and an array but for our brackets so JSON has several
type a string an object and an array but for our brackets so JSON has several

different types we have strings numbers that can be represented in many
different types we have strings numbers that can be represented in many

different ways boolean's which is true or false are arrays which are surrounded
different ways boolean's which is true or false are arrays which are surrounded

with we're bracket and a comma space are
with we're bracket and a comma space are

objects which are denoted by a curly bracket and on top of it
objects which are denoted by a curly bracket and on top of it

no so now that you've learned high-level about JSON let's write a JSON file so I
no so now that you've learned high-level about JSON let's write a JSON file so I

have an empty file here called JSON example dot JSON so JSON file has the
have an empty file here called JSON example dot JSON so JSON file has the

extension JSON now a JSON file can just hold a single type in it you could say
extension JSON now a JSON file can just hold a single type in it you could say

true this is actually valid JSON or if you did a string
true this is actually valid JSON or if you did a string

you could just say string same down to just saying null but that's not really
you could just say string same down to just saying null but that's not really

useful it's only one item and if you want it to grow it doesn't work so most
useful it's only one item and if you want it to grow it doesn't work so most

of the time a JSON file is either an array or an object so it usually either
of the time a JSON file is either an array or an object so it usually either

starts off with a bracket indicating an array or our curly brackets for an
starts off with a bracket indicating an array or our curly brackets for an

object let's write that cat that we've done so in a JSON file I would start it
object let's write that cat that we've done so in a JSON file I would start it

off by saying curly bracket and within that this would hold my object so if I
off by saying curly bracket and within that this would hold my object so if I

wanted to make an array of cats I would say I have an array named cats so this
wanted to make an array of cats I would say I have an array named cats so this

is the name is cats and then to denote its type I start with a bracket so now
is the name is cats and then to denote its type I start with a bracket so now

this cats is an array in this case cats is an array with nothing in it so I want
this cats is an array in this case cats is an array with nothing in it so I want

to add an object and I'm gonna start off with making my first cats so I'm gonna
to add an object and I'm gonna start off with making my first cats so I'm gonna

enter down a little and we'll start off with our cat so I can make first name
enter down a little and we'll start off with our cat so I can make first name

and save its name and I have two cats and one cat's name is algebra and she is
and save its name and I have two cats and one cat's name is algebra and she is

10 years old and the type of cat she is it's a calico now I want to add another
10 years old and the type of cat she is it's a calico now I want to add another

object to this ring because I have two cats we put a comma and then we didn't
object to this ring because I have two cats we put a comma and then we didn't

know that we have another object coming so we don't end with a comma that's not
know that we have another object coming so we don't end with a comma that's not

valid JSON so when you're done don't have a lingering comma so here I have a
valid JSON so when you're done don't have a lingering comma so here I have a

cat named Chell from Portal she is
cat named Chell from Portal she is

seven years old and she's like a gray tabby calico so it's a type gray tabby
seven years old and she's like a gray tabby calico so it's a type gray tabby

although that's not truly her type and she'll be very upset about that if she
although that's not truly her type and she'll be very upset about that if she

finds out so this is the list of cats I have this an array of cat types you can
finds out so this is the list of cats I have this an array of cat types you can

add more to it you don't have to just have one array in here so I have dogs so
add more to it you don't have to just have one array in here so I have dogs so

I'm putting a comma and now I'm saying dogs I actually only have one dog but
I'm putting a comma and now I'm saying dogs I actually only have one dog but

maybe I can convince my husband one day to let me have another dog so we can
maybe I can convince my husband one day to let me have another dog so we can

make an array again with our object and in this case I have an array of one dog
make an array again with our object and in this case I have an array of one dog

name is Leela Futurama age is five and type is mutt now we have created a JSON
name is Leela Futurama age is five and type is mutt now we have created a JSON

file that holds two arrays one is an array of cats the one is an array of
file that holds two arrays one is an array of cats the one is an array of

dogs we have our strings and we're also holding a number and then we have our
dogs we have our strings and we're also holding a number and then we have our

type as well which is another string if we wanted to we can maybe have a
type as well which is another string if we wanted to we can maybe have a

boolean let's say if they're spay or neutered right so is
boolean let's say if they're spay or neutered right so is

it means a true and that's true also for all these others maybe this is a file
it means a true and that's true also for all these others maybe this is a file

that holds a configuration of all animals that people have and maybe
that holds a configuration of all animals that people have and maybe

because other people have Birds we want to capture Birds but I don't have any
because other people have Birds we want to capture Birds but I don't have any

birds so I can say birds here and instead of giving back an empty array I
birds so I can say birds here and instead of giving back an empty array I

can also give back a null and that means there is nothing there for birds so now
can also give back a null and that means there is nothing there for birds so now

you've learned how to work with JSON
you've learned how to work with JSON