Section 2.5. Questions

2.5. Questions

1. Of the following identifiers, which are valid, which are not, and why?

2. $someVariable _someVariable 1Variable some_variable somèvariable function .someVariable some*variable

   
   

3. Convert the following identifiers using the conventions outlined in the first section of the chapter:

4. var some_month; function theMonth // function to return current month current-month // a constant var summer_month; // an array of summer months MyLibrary-afunction // a function from a JavaScript package 

   
   

5. Is the following string literal valid? If not, how would you fix it?

6. var someString = 'Who once said, "Only two things are infinite, the universe and human stupidity, and I'm not sure about the former."'

   
   

7. Given a number, 432.54, what JavaScript returns the integer component of the number, and then finds the hexidecimal and octal conversion?

8. You create a JavaScript function in a library that can be used by other applications. A parameter, someMonth, is passed to the function. How would you determine whether it's null or undefined?

Answers are provided in the appendix.