CSCI 446 Unit #3 Part I

Specific Requirements

This part is worth 10 points (half point per requirement). Your JS file must include:

• define a global var named snowInches with value 5
• definition of an object named skiArea with properties name (choose your favorite), base set to 19, and 3 functions:
• isOpen returns true if the base is greater or equal 24, false otherwise.
• openSoon returns true if base + snowInches is greater or equal 24, false otherwise.
• openTomorrow has one parameter named snowInches. It also returns true if base + snowInches is greater or equal 24, false otherwise.
• writeln the ski area name
• writeln the result of calling isOpen
• writeln isOpen (note: without (), this should show the code. This happens because functions are first class in JS!).
• writeln the global var snowInches
• writeln the result of calling openSoon
• writeln the result of calling openTomorrow
• create a var named backCountry that is a function that:
1. writeln a var named vertical
2. sets a variable named avalancheChance to 50 - WITHOUT using var. NOTE: it's best practice to use var, the point of this is to see what happens if you forget
3. declare (using var) a variable named vertical with a value of 800. Self test: is this a local or global var?
4. writeln vertical
5. set snowInches to 20
• try to writeln avalancheChance. Put a comment in your code to explain the issue.
• call backCountry
• writeln avalancheChance.
• writeln snowInches

There's no creative programming in this exercise, but be sure you understand scope and hoisting and have some idea of first-class functions (we'll do more with this concept later).

Parts I and II will be submitted together.