So let's say we have some streets that looks like this, there's a street here.
And maybe there's a curvy street right there, and
another street running here, maybe another street running there.
And the goal for the learners is that they want to find intersections in this map, or
take intersections in this map, and then plot directions from one point to another.
So basically, what they need to work with is these intersection points and
connections between them.
But this map data, as you can probably imagine, is real world and
it's extremely complex.
So there's lot more than just these intersection points in this data.
In fact, in addition to these intersection points,
you actually get all these other little points, along each of these lines.
So you've got all these yellow points here, and
ditto for all the other lines here.
>> So those dots trace the shape of the road.
>> Exactly.
So these dots are necessary so that we can trace the shape of the road.
>> So, let's say you've got some program,
let's say I've got program A, And I want to run it.
Well, I'm going to run it on, likely on a processor.
>> Okay.
>> Now in the old days, and by old days, I mean like, 2004 [LAUGH].
>> [LAUGH] >> You'd only have one choice when
you ran the program.
It could only run on the chip, because the chip could only run one program at a time.
>> Okay.
>> But after 2004, we started getting multi-core processors.
>> Okay. >> And have you heard about those before?
>> Yeah, all the laptops these days have quad core, all these other.
>> Exactly, that's exactly what it is.
So you've more than one core on a single processor.
And so what you have here is,
got your four cores here, and now you have choices.
>> So you saw some examples, and
again I want to go back to the notion that these didn't come automatically.
It's not like we just stood up there and automatically drew these nice diagrams.
We practiced this over, and over, and over.
So oftentimes, people tend to write either too much or more commonly, they write too
little, and what they write is just sort of nonsensical and not well organized.
>> So we encourage you to practice how to use your visual aids, in particular how to
write on a white board, to illustrate a technical concept very clearly.