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diff --git a/usth/ICT2.7/P2L2 OO Software Engineering and UML Subtitles/3 - Objects and Classes - lang_en_vs5.srt b/usth/ICT2.7/P2L2 OO Software Engineering and UML Subtitles/3 - Objects and Classes - lang_en_vs5.srt deleted file mode 100644 index 85bb32f..0000000 --- a/usth/ICT2.7/P2L2 OO Software Engineering and UML Subtitles/3 - Objects and Classes - lang_en_vs5.srt +++ /dev/null @@ -1,83 +0,0 @@ -1 -00:00:00,090 --> 00:00:02,770 -Let's start with objects. An object is a - -2 -00:00:02,770 --> 00:00:06,330 -computing unit organized around a collection of state - -3 -00:00:06,330 --> 00:00:09,350 -or instance variables that define the state of - -4 -00:00:09,350 --> 00:00:12,390 -the object. In addition, each object has associated - -5 -00:00:12,390 --> 00:00:15,150 -with it a set operations or methods that - -6 -00:00:15,150 --> 00:00:17,850 -operate on such state. So what that means - -7 -00:00:17,850 --> 00:00:21,420 -is that operations and methods read and write - -8 -00:00:21,420 --> 00:00:25,210 -instance variables. And in traditional object orientation, we say - -9 -00:00:25,210 --> 00:00:28,240 -that operations are invoked by sending a message - -10 -00:00:28,240 --> 00:00:30,520 -to the appropriate object, which is what we call - -11 -00:00:30,520 --> 00:00:33,660 -normally a method implication. So now that we define - -12 -00:00:33,660 --> 00:00:37,590 -what an object is, state variables, or attributes, and - -13 -00:00:37,590 --> 00:00:41,440 -operations or methods, let's see what a class is. - -14 -00:00:41,440 --> 00:00:44,900 -A class is basically a template. A blueprint, if - -15 -00:00:44,900 --> 00:00:47,700 -you wish, from which new objects, which is what - -16 -00:00:47,700 --> 00:00:50,655 -we call instances of the class can be created. - -17 -00:00:50,655 --> 00:00:52,800 -And notice that the fact of having a blueprint for - -18 -00:00:52,800 --> 00:00:55,610 -objects that allows us to create as many objects as - -19 -00:00:55,610 --> 00:00:58,390 -we want can further reuse, and also contribute to make - -20 -00:00:58,390 --> 00:01:00,300 -the code more readable, understandable, - -21 -00:01:00,300 --> 00:01:02,270 -and therefore ultimately more maintainable. |