True/False
Indicate whether the sentence or statement is true
or false.
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1.
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An
array is simply a block of variables.
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2.
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The
use of arrays in ActionScript is optional; there is nothing you can do with an array that you
can’t do in some other fashion.
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3.
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The
following syntax creates an array called myArray.
myArray = new Array();
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4.
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It’s not common to use arrays in for loops, with the loop index used as the array
index.
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5.
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The
length property of an array is read only.
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6.
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Creating an array and then populating each of its elements with other arrays is called
nesting an array.
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7.
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A
nested array is actually a multidiminsional array.
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8.
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Arrays can have any number of dimensions you like. Below is an example of a 3 x
3 x 5 multidimensional array.
myArray = new
Array();
for(i=0; i<3; ++i){
myArray[i] = new
Array();
for(j=0; j<3;
++j){
myArray[i][j] = new Array();
for(k=0; k<5; ++k)
myArray[i][j][k] = "("+i+", "+j+",
"+k+")";
}
}
for(i=0; i<3; ++i){
for(j=0; j<3; ++j){
myOutputString = "
";
for(k=0;
k<5; ++k)
myOutputString += myArray[i][j][k] + "
";
trace(myOutputString);
}
trace(" "); //blank
line
}
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9.
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You
can’t access a movie clip properties as an array.
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10.
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The
eval function gives an absolute path, whereas array notation gives a relative one.
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Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
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11.
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After
you have a new array ready, you can add, remove, and access elements in it. Which of the
following code serves as an example of this? a. | myArray = new Array();
new Array[0] =
100;
trace( myArray[0] + 15); | c. | myArray = new Array();
myArray[0] =
100;
trace( myArray[0] + 15); | b. | myArray = new Array();
myArray[i] =
100;
trace( myArray[0] + 15); | d. | none of the above | | | | |
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12.
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Select the best choice for the following code...
myArray = new Array(“apple”, “bannana”,
“cabbage”);
trace(myArray.toString());
a. | This array is being initialized with 3
strings. | c. | This code will
not work. | b. | Three elements are given as arguments to the constructor
for the Array object. | d. | both a and
b | | | | |
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13.
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Given
the following code...
myArray = new
Array();
for(i = 0; i<5; ++i){
myArray[i] = new Array();
for(j=0; j<5; ++j)
myArray[i][j] =
"["+i+", "+j+"]";
}
for(i=0; i<5; ++i){
myOutputString = "
";
for(j=0; j<5;
++j)
myOutputString +=
myArray[i][j] + " ";
trace(myOutputString);
}
The above code is designed to .... a. | create a
three-dimensional array of strings where each string is an (x,y) pair indicating the indexes of that
element. | d. | both b and
c | b. | create a nested
array. | e. | none of the
above | c. | create a two-dimensional array of strings where each string is
an (x,y) pair indicating the indexes of that element. | | | | |
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14.
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Which
of the following statements is true. a. | The splice method changes the array it’s called
on. | c. | Slice and splice
do vastly different things. | b. | Slice makes a copy of the array it’s called
on. | d. | all statements
are true. | | | | |
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15.
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Indicate the most correct statement. a. | Sort leaves the
original array intact and creates a new sorted array. | c. | Sort returns an alphabetically ordered list of
values. | b. | Sort does not leave the original array intact; instead, it
alters it. | d. | both b and
c | | | | |
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16.
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Lexicographic order has to do with .... a. | the ASCII values
of the characters in the string. | c. | the UNICODE values of the characters in the
string. | b. | the ANSI values of the characters in the
string. | d. | the alphanumeric
sort order of variables. | | | | |
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17.
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The
following code...
myArray = new Array();
myArray.push("cabbage");
myArray.push("apple");
myArray.push("Billy");
myArray.push("dog-bone");
myArray.push("banana");
trace(myArray.toString());
myArray.sort(Array.CASEINSENSITIVE);
trace(myArray.toString());
a. | will be sorted
lexicographically | c. | will be sorted
alphanumerically | b. | will be sorted aphabetically | d. | the case of the sorted elements will affect the
sort. | | | | |
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18.
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The
complement to the pop method is a. | the shift method | c. | the reverse method | b. | the unshift
method | d. | the push
method | | | | |
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19.
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Consider the following code and indicate the most correct
choice.
myArray = new Array();
a. | the ‘new’ keyword is used to create a new object
called ‘myArray’ | c. | a new array
object is being constructed through the use of the keyword ‘new’ | b. | the
‘new’ keyword is used to create a new object called
‘Array’ | d. | both a and
c | | | | |
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20.
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Indicate the output for the following code...
myArray = new
Array();
myArray[0] = 100;
myArray[3] =
100;
myArray[5] = 100;
trace(myArray);
a. | 100,100,100 | c. | undefined | b. | 100,undefined,undefined,100,undefined,
100 | d. | this code will
not work. It will produce and error message. | | | | |
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Matching
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Each
array object comes with several predefined methods. Match the correct method definition with each
array method. a. | Array.toString | g. | Array.shift | b. | Array.join | h. | Array.unshift | c. | Array.concat | i. | Array.sort | d. | Array.reverse | j. | Array.sortOn | e. | Array.pop | k. | Array.slice | f. | Array.push | l. | Array.splice | | | | |
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21.
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Reverses the order of all elements in an array.
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22.
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Returns a string that represents the elements in an array.
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23.
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Joins
all the elements of an array into a string
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24.
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Adds
and removes elements from an array
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25.
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Joins
two strings and returns the conglomeration.
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26.
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Removes the last elements from an array and returns its value
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27.
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Removes a section of an array and returns it as a new array.
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28.
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Removes the first element from an array and returns its value
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29.
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Sorts
an array based on one element of the array
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30.
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Adds
a new element to the end of an array and returns the array’s length
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31.
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Sorts
an Array
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32.
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Adds
a new element to the beginnning of an array and returns the array’s length
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