Alarm Clock Warmup

Write a ruby script that will say “Time’s up!” after a given number of seconds or minutes.

Prep

First, get familiar with the “say” command. Please use headphones if you have them :) From the terminal type:

say "Hello, I can talk!"
say -v "Pipe Orga" "Hello, I am talking!"

Next, get familiar with Ruby’s system command, which runs the command you give it as if it were on the command line. From IRB type:

system("ls -la")
system("pwd")

Next, get familiar with infinite loops and “exit”. Add the following to a ruby file and run it:

i = 0
while true
  exit if i == 100
  puts i
  i += 1
end

Making it work

Now you have all the tools you need to write an alarm clock that tells you when it’s done! Here’s how it works:

• In your ruby file, grab the current time and put it in a variable called start_time
• Create a loop that compares the current time to the start_time
• If more than 10 seconds have passed, make the computer say “Time’s up!” and exit

Once you've got that, take it to the next level by:

• Allowing the script to take a time like ruby my_clock.rb 2 minutes (HINT: use ARGV to find 2 and minutes)

NOTE: if you get a script that runs forever, use CTL+C to stop it.

Setup

• Fork
• Clone
• Turn on TravisCI for the fork by visiting https://travis-ci.org/profile/, clicking the "Sync now" button and scrolling down to find the repository to build.
• Create a new branch for your work using git checkout -b v1
• Implement specs and code
• Push using git push -u origin v1

Further Practice

This warmup can be completed multiple times to increase your comfort level with the material. To work on this from scratch, you can:

1. Add an upstream remote that points to the original repo git remote add upstream git@github.com:gSchool/alarm-clock.git
2. Fetch the latest from the upstream remote using git fetch upstream
3. Create a new branch from the master branch of the upstream remote git checkout -b v2 upstream/master
4. Implement specs and code
5. Push using git push -u origin v2

Each time you do the exercise, create a new branch. For example the 3rd time you do the exercise the branch name will be v3 instead of v2.