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# Secret Handshake > 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". ```text 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. The Scala exercises assume an SBT project scheme. The exercise solution source should be placed within the exercise directory/src/main/scala. The exercise unit tests can be found within the exercise directory/src/test/scala. To run the tests simply run the command `sbt test` in the exercise directory. For more detailed info about the Scala track see the [help page](http://exercism.io/languages/scala). ## Source Bert, in Mary Poppins [http://www.imdb.com/title/tt0058331/quotes/qt0437047](http://www.imdb.com/title/tt0058331/quotes/qt0437047) ## Submitting Incomplete Solutions It's possible to submit an incomplete solution so you can see how others have completed the exercise.
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74 entries across 74 versions & 1 rubygems