Exercises

1. What does AHA stand for?
2. Why should we be very careful when using dot sourcing?
3. We’ve created a variable called $ScriptBlock and populated it with a scriptblock. Let’s say we call it like this:

   $ScriptBlock

   We don’t get the output we expect. Why not?

4. What parameter argument might we use to check that our input is a valid IP address?
5. We’ve created a filter, get-square, and we’re trying to use it like this:

   Get-square 365

   Why isn’t there any output?

6. What are we doing here?

   $private:number

7. What’s the main difference between a function and a scriptblock?
8. What are we doing wrong here?

   Function get-square($a) {$a*$a}
   15 | get-square

9. We’ve spent a lot of time in this chapter getting an inaccurate square root. How would we write a function to get an accurate square root?

   Function get-root($a) {
   <what goes here?>
   }