text stringlengths 1 81 | start float64 0 10.1k | duration float64 0 24.9 |
|---|---|---|
JavaScript we've seen a bunch of | 5,271.769 | 3.301 |
different ways of representing data we | 5,273.539 | 3.39 |
store data in variables and those | 5,275.07 | 3.48 |
variables have had types like integers | 5,276.929 | 3.9 |
those variables of sum has been strings | 5,278.55 | 4.409 |
and some times have been HTML elements | 5,280.829 | 4.471 |
sometimes they've been arrays or lists | 5,282.959 | 4.051 |
of our items sometimes they've even been | 5,285.3 | 3.359 |
functions so we can set a variable equal | 5,287.01 | 3.569 |
to a function but perhaps one of the | 5,288.659 | 4.32 |
most useful data types inside of | 5,290.579 | 5.73 |
JavaScript is the JavaScript object so | 5,292.979 | 4.801 |
go into the JavaScript console just to | 5,296.309 | 3.451 |
demonstrate this what the JavaScript | 5,297.78 | 4.529 |
object is is it's really the equivalent | 5,299.76 | 4.799 |
of like a Python dictionary some | 5,302.309 | 5.07 |
Association of keys to values where you | 5,304.559 | 4.44 |
can look up something by a key or by a | 5,307.379 | 4.651 |
property and see what his value happens | 5,308.999 | 6 |
to be so if I had a variable like person | 5,312.03 | 5.909 |
I could set person equal to a JavaScript | 5,314.999 | 6.42 |
object who's like first name is Harry | 5,317.939 | 7.65 |
and whose last name is Potter again | 5,321.419 | 6.93 |
using syntax very similar to what the | 5,325.589 | 5.04 |
dictionary syntax looks like inside of | 5,328.349 | 4.86 |
Python as well and now that I have this | 5,330.629 | 5.01 |
variable person which is first Harry | 5,333.209 | 4.95 |
last Potter I can access a particular | 5,335.639 | 4.08 |
property of the person in a number of | 5,338.159 | 3.51 |
ways I can say something like person dot | 5,339.719 | 3.78 |
first to say get me the first name | 5,341.669 | 4.56 |
property of this particular object and I | 5,343.499 | 4.59 |
see that it's equal to Harry I could | 5,346.229 | 3.66 |
equivalently use square bracket notation | 5,348.089 | 3.961 |
the way Python does square bracket first | 5,349.889 | 4.29 |
and that will also give me Harry | 5,352.05 | 4.53 |
but this turns out to be quite powerful | 5,354.179 | 4.741 |
to be able to represent data in this | 5,356.58 | 4.23 |
structured way like this where I have an | 5,358.92 | 3.63 |
association of keys or otherwise known | 5,360.81 | 4.11 |
as properties with particular values and | 5,362.55 | 4.02 |
then I have the ability given a | 5,364.92 | 4.23 |
JavaScript object to be able to access a | 5,366.57 | 4.68 |
particular value and it turns out that | 5,369.15 | 3.93 |
one of the ways this is most useful is | 5,371.25 | 4.14 |
in the exchange of data moving data | 5,373.08 | 5.07 |
around from one service to another and | 5,375.39 | 4.65 |
so here we're going to introduce what | 5,378.15 | 3.81 |
are known as api's otherwise known as | 5,380.04 | 4.26 |
application programming interfaces which | 5,381.96 | 4.41 |
in the context of the web you can think | 5,384.3 | 4.14 |
of as some well-defined structured way | 5,386.37 | 4.26 |
for services on the Internet to | 5,388.44 | 4.11 |
communicate with each other that if you | 5,390.63 | 4.02 |
want your application to be able to talk | 5,392.55 | 3.899 |
to some other service maybe you want | 5,394.65 | 3.72 |
your application to interact with Google | 5,396.449 | 3.361 |
Maps or to be able to interact with | 5,398.37 | 3.3 |
Amazon or some other weather service to | 5,399.81 | 3.48 |
get the day's weather then you might be | 5,401.67 | 4.23 |
able to access some API some mechanism | 5,403.29 | 4.409 |
whereby you can communicate with another | 5,405.9 | 3.72 |
service by sending a request and | 5,407.699 | 4.351 |
receiving back data in some sort of very | 5,409.62 | 4.89 |
well structured format and very often | 5,412.05 | 4.56 |
that well structured format happens to | 5,414.51 | 4.05 |
be a particular type of data known as | 5,416.61 | 3.96 |
Jason which stands for JavaScript object | 5,418.56 | 4.679 |
notation which is a way of transferring | 5,420.57 | 6 |
data in the form of JavaScript objects | 5,423.239 | 5.611 |
these sort of objects that happen to | 5,426.57 | 4.47 |
have properties and values associated | 5,428.85 | 4.74 |
with them and so what does javascript | 5,431.04 | 4.29 |
object notation look like well if we | 5,433.59 | 3 |
think back to the applications that | 5,435.33 | 2.67 |
we've been creating these applications | 5,436.59 | 2.97 |
that are able to represent things like | 5,438 | 4.17 |
an airline and many movements of planes | 5,439.56 | 4.38 |
between particular destinations a | 5,442.17 | 4.41 |
JavaScript object representing a flight | 5,443.94 | 4.32 |
might look something like this | 5,446.58 | 3.48 |
a JavaScript object that has properties | 5,448.26 | 4.74 |
for origin is something destination is | 5,450.06 | 4.889 |
something duration is something things | 5,453 | 3.84 |
we've seen before but you might imagine | 5,454.949 | 4.02 |
that if we wanted our airline to be able | 5,456.84 | 3.87 |
to make its data available to other | 5,458.969 | 3.811 |
services so that other web applications | 5,460.71 | 4.35 |
or other programs could programmatically | 5,462.78 | 4.5 |
access information about flights we | 5,465.06 | 5.07 |
could pass data in this format to those | 5,467.28 | 5.01 |
other applications so that they could | 5,470.13 | 3.779 |
then treat this as a JavaScript object | 5,472.29 | 3.84 |
and get access to the information about | 5,473.909 | 3.631 |
it and the nice thing about this | 5,476.13 | 3.839 |
particular representation is that it is | 5,477.54 | 4.86 |
both human readable and machine readable | 5,479.969 | 4.17 |
that we as people can look at this and | 5,482.4 | 3.48 |
get an intuitive understanding for what | 5,484.139 | 3.901 |
all of this means but also a computer | 5,485.88 | 3.84 |
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