Tracks
/
Ruby
Ruby
/
Exercises
/
Secret Handshake
Secret Handshake

Secret Handshake

Medium

Instructions

There are 10 types of people in the world: Those who understand binary, and those who don't.

You and your fellow cohort of those in the "know" when it comes to binary decide to come up with a secret "handshake".

1 = wink
10 = double blink
100 = close your eyes
1000 = jump


10000 = Reverse the order of the operations in the secret handshake.

Given a decimal number, convert it to the appropriate sequence of events for a secret handshake.

Here's a couple of examples:

Given the input 3, the function would return the array ["wink", "double blink"] because 3 is 11 in binary.

Given the input 19, the function would return the array ["double blink", "wink"] because 19 is 10011 in binary. Notice that the addition of 16 (10000 in binary) has caused the array to be reversed.

Last updated 17 September 2021
Edit via GitHub The link opens in a new window or tab
Ruby Exercism

Ready to start Secret Handshake?

Sign up to Exercism to learn and master Ruby with 16 concepts, 109 exercises, and real human mentoring, all for free.