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diff --git a/usth/ICT2.7/P4L5 Software Refactoring Subtitles/6 - History of Refactoring - lang_en_vs4.srt b/usth/ICT2.7/P4L5 Software Refactoring Subtitles/6 - History of Refactoring - lang_en_vs4.srt deleted file mode 100644 index 3405b65..0000000 --- a/usth/ICT2.7/P4L5 Software Refactoring Subtitles/6 - History of Refactoring - lang_en_vs4.srt +++ /dev/null @@ -1,171 +0,0 @@ -1 -00:00:00,110 --> 00:00:02,340 -So if you follow my class so far, you know that - -2 -00:00:02,340 --> 00:00:04,570 -I like to give a little bit of history when I talk - -3 -00:00:04,570 --> 00:00:06,900 -about a specific topic. So I'm going to do the same also - -4 -00:00:06,900 --> 00:00:09,900 -in this case for refactoring. I'm going to start by mentioning, the fact - -5 -00:00:09,900 --> 00:00:13,440 -that refactoring is something that programmers have always done. I gave - -6 -00:00:13,440 --> 00:00:16,300 -you a trivial example just a minute ago of what refactoring is. - -7 -00:00:16,300 --> 00:00:18,080 -So even more complicated refactorings are - -8 -00:00:18,080 --> 00:00:20,880 -something that are commonplace for developers. - -9 -00:00:20,880 --> 00:00:23,110 -Somehow refactoring is especially important in - -10 -00:00:23,110 --> 00:00:25,240 -the context of object-oriented languages and - -11 -00:00:25,240 --> 00:00:28,080 -probably it's because the object-oriented features are well suited to - -12 -00:00:28,080 --> 00:00:31,640 -make designs flexible and reusable. Because of the fact that help - -13 -00:00:31,640 --> 00:00:35,120 -encapsulation, information hiding, and so they make it easier to - -14 -00:00:35,120 --> 00:00:38,330 -modify something without changing the functionality that it provides to the - -15 -00:00:38,330 --> 00:00:40,960 -outside world. However, you should keep in mind that refactoring - -16 -00:00:40,960 --> 00:00:44,330 -is really not specific to object oriented languages, you can also - -17 -00:00:44,330 --> 00:00:47,320 -refactor other languages, it's just more common to see it in - -18 -00:00:47,320 --> 00:00:50,450 -that context. So one of the first examples of a specific - -19 -00:00:50,450 --> 00:00:53,630 -discussion of what the refactorings are is Opdyke's PhD - -20 -00:00:53,630 --> 00:00:57,710 -thesis in 1990. Which discusses refactorings for small talk. - -21 -00:00:57,710 --> 00:00:59,360 -And some of you might be familiar with small - -22 -00:00:59,360 --> 00:01:02,600 -talk, which is a specific objectory language. And in - -23 -00:01:02,600 --> 00:01:06,590 -more recent times, refactoring's becoming increasing popular due to - -24 -00:01:06,590 --> 00:01:10,370 -lightweight development methodoogies, due to agile development, which is - -25 -00:01:10,370 --> 00:01:12,630 -something that we just discussed in this class. For - -26 -00:01:12,630 --> 00:01:15,830 -example, when we talked about extreme programming, we mentioned refactoring - -27 -00:01:15,830 --> 00:01:17,950 -a few times. And the reason why its so popular - -28 -00:01:17,950 --> 00:01:20,690 -is because re-factoring is one of the practices that help. - -29 -00:01:20,690 --> 00:01:24,780 -Making changes less expensive. And therefore adapt to changing requirements - -30 -00:01:24,780 --> 00:01:26,980 -and changing environments more quickly. - -31 -00:01:26,980 --> 00:01:29,140 -And continuing with historical perspective, one - -32 -00:01:29,140 --> 00:01:31,760 -of the milestones in the history of re-factoring [INAUDIBLE] is - -33 -00:01:31,760 --> 00:01:34,660 -a book by Martin Fowler. This is a book entitled - -34 -00:01:34,660 --> 00:01:37,610 -Improving the Design of Existing [INAUDIBLE]. And it contains a - -35 -00:01:37,610 --> 00:01:41,320 -catalog of refactorings, a list of bad smells, in code, and - -36 -00:01:41,320 --> 00:01:43,450 -we're going to see what that mean exactly. Nothing to - -37 -00:01:43,450 --> 00:01:45,570 -do with other kinds of bad smells. It talks about - -38 -00:01:45,570 --> 00:01:48,900 -guidelines on when to apply refactoring. And finally, which is - -39 -00:01:48,900 --> 00:01:52,540 -very useful, it provides example of code, before and after. - -40 -00:01:52,540 --> 00:01:54,660 -Applying the refactoring and we're going to use more of the - -41 -00:01:54,660 --> 00:01:57,190 -same style when discussing refactoring in the rest of this - -42 -00:01:57,190 --> 00:02:01,090 -lesson. More specifically what we're discussing next, are some examples - -43 -00:02:01,090 --> 00:02:05,130 -of refactoring and also some examples of code bad smells. |