https://github.com/maxcnunes/elixir-user-reflexes

https://github.com/maxcnunes/elixir-user-reflexes

Last synced: about 2 months ago
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• Host: GitHub
• URL: https://github.com/maxcnunes/elixir-user-reflexes
• Owner: maxcnunes
• Created: 2016-01-05T21:53:00.000Z (about 9 years ago)
• Default Branch: master
• Last Pushed: 2016-01-05T22:41:43.000Z (about 9 years ago)
• Last Synced: 2024-10-18T07:20:58.838Z (3 months ago)
• Language: Elixir
• Size: 3.91 KB
• Stars: 0
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# user-reflexes

This week I was reading [Go weekly](http://golangweekly.com/issues/90) and there was a post [Go Concurrency versus C and pthreads](http://denis.papathanasiou.org/posts/2015.12.26.post.html) with the following programming challenge:

> Write a program to test user reflexes: when it runs, it waits a random amount of time between 1 and 10 seconds, and prints "GO!" as a prompt.

> It then expects the user to hit the enter key, and times how fast enter is pressed, in milliseconds.

> If the enter key is pressed before the "GO!" prompt appears, the program prints "FAIL".

In that post it was implemented in Go and C. Since I'm learning Elixir I decided to implement it as well.

## Running

```bash

mix deps.get

iex -S mix run

UserReflexes.run

```

**Example**

```bash

➜  user_reflexes master ✓ iex -S mix run

Erlang/OTP 18 [erts-7.1] [source] [64-bit] [smp:4:4] [async-threads:10] [hipe] [kernel-poll:false] [dtrace]

ExSync started.

Interactive Elixir (1.1.1) - press Ctrl+C to exit (type h() ENTER for help)

iex(1)> UserReflexes.run

Press ENTER in 3000 milliseconds

> 2

> 1

> 0

FAILED: Answred before the GO time

Answred at -162 milliseconds

true

iex(2)>

```