Learning PHP, MySQL, and JavaScript

Chapter 16 Answers

Question 16-1

JavaScript functions and variable names are case-sensitive. The variables Count, count, and COUNT are all different.

Question 16-2

To write a function that accepts and processes an unlimited number of parameters, access parameters through the arguments array, which is a member of all functions.

Question 16-3

One way to return multiple values from a function is to place them all inside an array and return the array.

Question 16-4

When defining a class, use the this keyword to refer to the current object.

Question 16-5

The methods of a class do not have to be defined within a class definition. If a method is defined outside the constructor, the method name must be assigned to the this object within the class definition.

Question 16-6

New objects are created using the new keyword.

Question 16-7

A property or method can be made available to all objects in a class without replicating the property or method within the object by using the prototype keyword to create a single instance, which is then passed by reference to all the objects in a class.

Question 16-8

To create a multidimensional array, place subarrays inside the main array.

Question 16-9

The syntax you would use to create an associative array is key : value, within curly braces, as in the following:

assocarray = {"forename" : "Paul", "surname" : "McCartney",
"group" : "Beatles"}

Question 16-10

A statement to sort an array of numbers into descending numerical order would look like this:

numbers.sort(function(a,b){return ...