* Beginning JavaScript
    * Functions with arguments and return values
    * Arrays
	* Loops
	* Conditionals



* Add a `script` tag in the `index.html` file to load the `rps.js` file that you will create
* Write and debug the JavaScript code. 


## JavaScript

You have to write three JavaScript functions in the `rps.js` file. The
first is a fundamental building block of the Rock-Paper-Scissors (RPS)
game.  It must be named `compare` and it takes two arguments, both
strings. The two strings are moves in RPS, namely "rock", "paper", or
"scissors". The return value is:

* -1 if the first argument beats the second,
* 0 if it's a tie
* +1 if the first argument loses to the second

The second function takes no arguments. It's called `test_compare` and
it shows that the first function works, by trying all 9 possible
calling patterns and the return value. It does its output using
`console.log` so the output might look like:

```
for rock and rock compare returns 0
for rock and paper compare returns 1
for rock and scissors compare returns -1
for paper and rock compare returns -1
for paper and paper compare returns 0
for paper and scissors compare returns 1
for scissors and rock compare returns 1
for scissors and paper compare returns -1
for scissors and scissors compare returns 0
```

You could do this with 9 `console.log` statements, but you should use
an array of the three possible moves and loop over it.

Invoke this function in your `rps.js` file, so that we'll automatically see the output.

Finally, the last function named `test_sort` shows the funny behavior that
sorting does when we use the RPS comparison function you wrote. You will
sort the following array:

```
:::JavaScript
var many_moves = [
   "rock", "paper", "scissors",
   "rock", "paper", "scissors",
   "rock", "paper", "scissors"];
```

The function should sort that array using your `compare` function and
print that. Then it should sort the array using the default comparison and
print the result. Invoke that function in your file as well.  Note that to
print the array, you should use `JSON.stringify()` on the array and print
the resulting string. This is because `console.log(my_array)` will yield a
"live" display that won't show the array as it was at the time it was
printed, which is what we want.

Finally, add a comment at the end of your `rps.js` file explaining the
results of the sorting by your `compare` function.


* Make sure you have three JS functions in `rps.js`, *and* an explanation of
the sorting output when sorted by your function