1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
|
1
00:00:00,100 --> 00:00:02,210
To conclude this lesson, I want to discuss the
2
00:00:02,210 --> 00:00:06,170
concept of negative design patterns, that is, patterns that should
3
00:00:06,170 --> 00:00:09,600
be avoided. Interestingly, negative patterns were also mentioned in
4
00:00:09,600 --> 00:00:12,950
Christopher Alexander's book, so in the first formulation of patterns.
5
00:00:12,950 --> 00:00:16,219
So negative design pattern are basically guidelines on how
6
00:00:16,219 --> 00:00:19,689
not to do things. In consoles with patterns, the guidelines
7
00:00:19,689 --> 00:00:21,920
on how to do things. So basically, what the negative
8
00:00:21,920 --> 00:00:25,170
design patterns do is, they enable recurring design defects to
9
00:00:25,170 --> 00:00:28,070
be avoided. And as we will see in this class extensively,
10
00:00:28,070 --> 00:00:30,080
in mini-course four, negative patterns are
11
00:00:30,080 --> 00:00:33,380
also called anti-patterns or bad smells,
12
00:00:33,380 --> 00:00:36,540
or bad code smells. So in mini-course four we will see several
13
00:00:36,540 --> 00:00:39,480
examples of bad smells and what we can do to eliminate them.
|
