2. CHAPTER 1 THE ABC OF PROGRAMMING

3. B

4. HOW DO COMPUTERS FIT IN WITH THE WORLD AROUND THEM?

5. Here is a model of a hotel, along with some trees, people, and cars.

6. To a human, it is clear what kind of real-world object each one represents. OBJECT TYPE: HOTELOBJECT TYPE: CAR

7. Computers create models of the world using data.

8. The objects in these models use properties, events, and methods.

9. PROPERTIES

10. Properties tell the computer about the characteristics of an object.

11. PROPERTIES nameQuay rating4 rooms42 bookings21 gymfalse pooltrue OBJECT TYPE: HOTEL

12. EVENTS

13. Events tell the computer how the user can interact with an object.

14. EVENThappens when: bookreservation is made cancelreservation is cancelled OBJECT TYPE: HOTEL

15. METHODS

16. Methods tell the computer how to change the properties of an object.

17. METHOD what it does: makeBooking() increases value of bookings PROPERTY cancelBooking() decreases value of bookings property checkAvailability() subtracts value of bookings property from value of rooms property and returns number of rooms available OBJECT TYPE: HOTEL

18. Here is the data the computer might use to make a model of one of the cars.

19. OBJECT TYPE: CAR EVENThappens when:method called: brakedriver slows downchangeSpeed() acceleratedriver speeds upchangeSpeed() METHODwhat it does: changeSpeed()increases or decreases value of currentSpeed property PROPERTIES makeBMW currentSpeed45mph colorsilver fueldiesel

20. OBJECT TYPE: CAR EVENThappens when:method called: brakedriver slows downchangeSpeed() acceleratedriver speeds upchangeSpeed() METHODwhat it does: changeSpeed()increases or decreases value of currentSpeed property PROPERTIES makeBMW currentSpeed45mph colorsilver fueldiesel

21. OBJECT TYPE: CAR EVENThappens when:method called: brakedriver slows downchangeSpeed() acceleratedriver speeds upchangeSpeed() METHODwhat it does: changeSpeed()increases or decreases value of currentSpeed property PROPERTIES makeBMW currentSpeed45mph colorsilver fueldiesel

22. OBJECT TYPE: CAR EVENThappens when:method called: brakedriver slows downchangeSpeed() acceleratedriver speeds upchangeSpeed() METHODwhat it does: changeSpeed()increases or decreases value of currentSpeed property PROPERTIES makeBMW currentSpeed45mph colorsilver fueldiesel

23. OBJECT TYPE: CAR EVENThappens when:method called: brakedriver slows downchangeSpeed() acceleratedriver speeds upchangeSpeed() METHODwhat it does: changeSpeed()increases or decreases value of currentSpeed property PROPERTIES makeBMW currentSpeed30mph colorsilver fueldiesel

24. WEB BROWSERS

25. Web browsers use models of the browser window and the web pages contained in them.

26. PROPERTIES locationhttp://www.javascriptbook.com/ OBJECT TYPE: WINDOW PROPERTIES URLhttp://www.javascriptbook.com/ lastModified09/04/2014 15:33:37 titleLearn JavaScript & jQuery - A book that teaches you in a nicer way OBJECT TYPE: DOCUMENT

27. Web browsers use these models to understand how to interpret web pages.

28. 1

29. The browser receives a web page 1

30. Constructive & Co Constructive & Co For all orders and enquiries, please call 555-3344

31. 2 The browser receives a web page 1

32. 12 It creates a model of the page and stores it in memory

33. document OBJECT

34. document ELEMENT OBJECT

35. document Constructive & Co. For all orders and inquiries please call 555-3344 TEXT ELEMENT OBJECT

36. document Constructive & Co. For all orders and inquiries please call 555-3344 rel stylesheet href css/c01.css ATTRIBUTE TEXT ELEMENT OBJECT

37. 3 The browser receives a web page 12 It creates a model of the page and stores it in memory

38. 3 It shows the page on screen using a rendering engine The browser receives a web page 12 It creates a model of the page and stores it in memory