Here's a few answers.
2. XmlHTTPrequest object, returns XHR request as obj or string, YUI callback augments object, jQuery callback augments string 4. http://www.json.org/ 5. block / inline 6. assume allLayer is array of layer1 and layer2 YAHOO.util.Dom.setStyle(allLayer, "opacity", 66%); YAHOO.util.Dom.setStyle(allLayer[0], "backgroundColor", "#000"); On Dec 29, 7:47 pm, "Angel Marquez" <angel.marq...@gmail.com> wrote: > *(required) Q: *Describe the difference in result of the JavaScript DOM > methods getElementById and getElementsByClassName. > > *2. (required) *Given this JavaScript statement: > * > ** objXHR.open('GET',**' HYPERLINK "http://"http://myURL.com',true** > );** > * > a.* Q:* What, probably, is the type of the object named "objXHR"? > > b.* Q: *What is the purpose of each of the parameters being passed > to the "open" method? > > *Q: *If an absolute URL is passed in the second argument, what kind of > restriction *usually *applies? > > * 3. (required) *How would you *(a) *declare and then *(b) *instantiate a > JavaScript class to describe a "Square" object, taking one argument in its > constructor? The instance of a Square should have sides 4 units in length. > *( c )*What properties might a Square object have and how would they be > coded? > > *a.* declare: function Square(numericSideArgument) { > ... (some other stuff) > } > *b.* use: var mySquare = new Square(4); > *c.* methods: *perimeter*, coded as "this.perimeter = > numericSideArgument * 4;" > *area*, coded as "this.area = > numericSideArgument ^ 2;" (squared, i.e. width * height) > So, the whole definition of Square would be: > > function Square(numericSideArgument) { > > this.perimeter = numericSideArgument * 4; > this.area = numericSideArgument ^ 2; > return this; > > } > > So, *Q: *"mySquare.perimeter" would equal? > > *Q: *"mySquare.area" would equal *?* > > * 4.* *(desired) *An object called "auto" has an "id" attribute with value > of "taurus" and a "color" attribute with value "blue". Additionally, it has > a child object "radio", which contains an array "knob" which contains three > items with names and shapes: > > name: power, shape: round > > name: tune, shape: oval > > name: scan, shape: square > > *Q: *What does the acronym JSON stand for? > *Q: *What does this object look like in JSON? > > * BONUS 5.* *(CSS-related)* Describe the difference between a <DIV> > element versus a <SPAN>. > > ** > > * BONUS 6.* *(Advanced JavaScript and YUI)* If I have a JavaScript > collection object "YAHOO.util.Dom" with a member method "setStyle" that > takes three arguments > > "an array of element id's" > > "a css property name", and > > "a single float value", > > ...*Q: *how would I write the *single *line of JavaScript that sets the > transparency of DIV's "layer1" and "layer2" to "66%"? > > *Q:* How would I write the single line of JavaScript that sets the > background color of only DIV "layer1" to hexadecimal "black"? > > *Q: *If there was another method which DID take a single-value, > non-array, in that first argument, in object-oriented terminology, the > method would be said to be "what"? > > *Q: *Does JavaScript support overloading? > > *BONUS 7:* *(Super-impressive)* *Q: *Can you summarize the > definition of "JavaScript enclosures"?
