The fourth test in CS 120 will be given during the official scheduled final exam period, on Friday, December 19, at 8:30 AM. It will be in our regular classroom. The test is really more of a fourth test rather than a final exam as such. It will be four or five pages long, compared to four pages for the previous tests.
This final test will concentrate on material that we have covered since the third test, but of course you need to know previous material to the extent that recent topics build on older ones. In addition, the test will include one or two summary essay questions that ask you to write about the course as a whole. For those essays, you should review the basic ideas of web page design, HTML, CSS, and JavaScript. And there might be some questions about basic ideas from the Gimp image processing program.
The main topic for the fourth segment of the course has been data structures: arrays, objects, constructors, classes, and the DOM. Reading from JavaScript & JQuery includes pages 70–73 and 100–130. You might also want to look at Chapter 1b, pages 25–42 for background information on objects, properties, methods, and the document object. You should also review Labs 12 through 14.
Here are some important terms and ideas that you should be familiar with:
data structure array elements of an array index of an element in an array creating an empty array: var A = []; creating an array containing a given list of values: var A = [2,3,5,7,11,13,17,19]; accessing an array element at a given index: A[7] using a variable or expression as an index: A[i] A[currentIndex+1] assigning values to array elements: A[7] = "foo"; A[i] = 0; the length of an array: A.length using for loops to work with arrays DOM functions that return arrays: document.getElementsByTagName("..."), document.getElementsByClassName("...") using these functions to apply an operations to all HTML elements of a given type object properties of an object; property name and property value creating an empty object: var pt = {}; adding a property or setting an property value: pt.x = 17; pt.y = 42; creating an object with a given list of values: var pt = { x: 17, y: 41 }; objects represent "entities" or "things" constructors using constructors to create objects calling a constructor with the "new" operator: var exam = new Date("Dec 18, 2014); a constructor defines a "class" of objects that have similar properties a property of an object can be a function method: a function that is a property of an object designing classes: what data, constructors, and methods are needed? arrays of objects example: using an object to represent a colored circle the Date class new Date() constructs an object that represents the current time new Date{"Jan 1, 2015") constructs a specified date/time method date.toString() gives a string representation of the date method date.getTime() is milliseconds since midnight, Jan 1, 1970 the Card class new Card("Ace","Spades") constructs a specified card method card.getSuit() gets the integer representing the suit method card.getValue() gets the integer representing the value method card.toString() gets a textual representation such as "Ace of Spades" the Deck class new Deck() constructs a shuffled deck method deck.shuffle() puts all cards back and shuffles the deck method deck.nextCard() gets the next card from the deck method deck.cardsLeft() tells how many cards are left in the deck the DOM, Document Object Model new method for the document object document.createElement("..."), for example: var element = document.createElement("p"); new methods for HTML element objects: method element.appendChild(child) Gimp image processing concepts levels tool selection drawing tools filter