Would you like to inspect the original subtitles? These are the user uploaded subtitles that are being translated:
1
00:00:00,110 --> 00:00:02,820
When we interact
with our computers,
2
00:00:02,820 --> 00:00:04,185
we use our mouse,
3
00:00:04,185 --> 00:00:06,465
keyboard, or even
a touch screen.
4
00:00:06,465 --> 00:00:08,980
We don't tell it the
actual zeros and ones,
5
00:00:08,980 --> 00:00:10,590
it needs to
understand something.
6
00:00:10,590 --> 00:00:12,915
But wait, we actually do.
7
00:00:12,915 --> 00:00:15,100
We just don't ever have
to worry about it.
8
00:00:15,100 --> 00:00:17,640
We use the concept of
abstraction to take
9
00:00:17,640 --> 00:00:21,135
a relatively complex system
and simplify it for our use.
10
00:00:21,135 --> 00:00:22,890
Use abstraction everyday in
11
00:00:22,890 --> 00:00:24,900
the real-world and you
may not even know it.
12
00:00:24,900 --> 00:00:26,235
If you've ever driven a car,
13
00:00:26,235 --> 00:00:27,660
you don't use to
know how to operate
14
00:00:27,660 --> 00:00:29,760
the transmission or
the engine directly.
15
00:00:29,760 --> 00:00:31,065
There's a steering wheel,
16
00:00:31,065 --> 00:00:33,105
pedals, maybe a gear stick.
17
00:00:33,105 --> 00:00:35,600
If you buy a car from a
different manufacturer,
18
00:00:35,600 --> 00:00:38,000
you operate it in pretty
much the same way,
19
00:00:38,000 --> 00:00:39,260
even though the stuff under
20
00:00:39,260 --> 00:00:41,215
the hood might be
completely different.
21
00:00:41,215 --> 00:00:43,685
This is the essence
of abstraction.
22
00:00:43,685 --> 00:00:45,650
Abstraction hides complexity by
23
00:00:45,650 --> 00:00:47,255
providing a common interface.
24
00:00:47,255 --> 00:00:48,965
The steering wheel, pedals,
25
00:00:48,965 --> 00:00:51,625
gear stick engages
in our car example.
26
00:00:51,625 --> 00:00:53,850
The same thing happens
in our computer.
27
00:00:53,850 --> 00:00:56,260
We don't need to know how it
works underneath the hood.
28
00:00:56,260 --> 00:00:57,980
We have a mouse and a keyboard
29
00:00:57,980 --> 00:00:59,705
we can use to interact with it.
30
00:00:59,705 --> 00:01:01,010
Thanks to abstraction,
31
00:01:01,010 --> 00:01:02,570
the average computer
user doesn't have
32
00:01:02,570 --> 00:01:04,230
to worry about the
technical details.
33
00:01:04,230 --> 00:01:05,510
We'll use this under
34
00:01:05,510 --> 00:01:07,940
the hood metaphor throughout
the program to describe
35
00:01:07,940 --> 00:01:09,245
the area that contains
36
00:01:09,245 --> 00:01:12,185
the underlying implementation
of a technology.
37
00:01:12,185 --> 00:01:14,030
In computing, we use abstraction
38
00:01:14,030 --> 00:01:15,665
to make a very complex problem,
39
00:01:15,665 --> 00:01:18,605
like how to make computers
work easier to think about.
40
00:01:18,605 --> 00:01:21,980
We do that by breaking it
apart into simpler ideas that
41
00:01:21,980 --> 00:01:23,780
describe single concepts or
42
00:01:23,780 --> 00:01:25,670
individual jobs that
need to be done,
43
00:01:25,670 --> 00:01:27,755
and then stack them in layers.
44
00:01:27,755 --> 00:01:29,720
This concept of
abstraction will be
45
00:01:29,720 --> 00:01:31,744
used throughout
this entire course.
46
00:01:31,744 --> 00:01:34,210
It's a fundamental concept
in the computing world.
47
00:01:34,210 --> 00:01:37,190
Another simple example
of abstraction in
48
00:01:37,190 --> 00:01:40,610
an IT role that you might see
a lot is an error message.
49
00:01:40,610 --> 00:01:41,990
We don't have to
dig through someone
50
00:01:41,990 --> 00:01:43,820
else's code and find a bug.
51
00:01:43,820 --> 00:01:45,710
This has been
abstracted out for us
52
00:01:45,710 --> 00:01:47,840
already in the form
of an error message.
53
00:01:47,840 --> 00:01:50,630
Symbol error message
like file not found,
54
00:01:50,630 --> 00:01:52,730
actually tells us a
lot of information and
55
00:01:52,730 --> 00:01:55,090
saves us time to
figure out a solution.
56
00:01:55,090 --> 00:01:56,720
Can you imagine if instead of
57
00:01:56,720 --> 00:01:58,250
abstracting an error message
58
00:01:58,250 --> 00:02:00,050
our computer did
nothing and we had
59
00:02:00,050 --> 00:02:02,120
no clue where to start
looking for answers.
60
00:02:02,120 --> 00:02:03,650
Abstraction helps us in
61
00:02:03,650 --> 00:02:06,749
many ways that we
don't even realize.4602
Can't find what you're looking for?
Get subtitles in any language from opensubtitles.com, and translate them here.
Afrikaans
Akan
Albanian
Amharic
Armenian
Azerbaijani
Basque
Belarusian
Bemba
Bengali
Bihari
Bosnian
Breton
Bulgarian
Cambodian
Catalan
Cebuano
Cherokee
Chichewa
Chinese (Simplified)
Chinese (Traditional)
Corsican
Croatian
Czech
Danish
Dutch
English
Esperanto
Estonian
Faroese
Finnish
Galician
Georgian
German
Greek
Guarani
Haitian Creole
Hausa
Hawaiian
Hebrew
Hmong
Hungarian
Icelandic
Indonesian
Irish
Italian
Japanese
Kazakh
Kinyarwanda
Kirundi
Kongo
Korean
Krio (Sierra Leone)
Kurdish
Kyrgyz
Laothian
Latin
Latvian
Lithuanian
Luganda
Luo
Luxembourgish
Macedonian
Malagasy
Malay
Maltese
Maori
Mauritian Creole
Moldavian
Mongolian
Myanmar (Burmese)
Montenegrin
Nepali
Norwegian
Pashto
Persian
Polish
Portuguese (Brazil)
Portuguese (Portugal)
Quechua
Romanian
Romansh
Russian
Samoan
Scots Gaelic
Serbian
Sesotho
Setswana
Seychellois Creole
Shona
Sindhi
Sinhalese
Slovak
Slovenian
Somali
Spanish
Swedish
Tajik
Thai
Tigrinya
Tonga
Turkish
Turkmen
Ukrainian
Uzbek
Vietnamese
Welsh
Wolof