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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". ``` 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. ## Setup There are two different methods of getting set up to run the tests with Objective-C: - Create an Xcode project with a test target which will run the tests. - Use the ruby gem `objc` as a test runner utility. Both are described in more detail here: http://exercism.io/languages/objective-c ### Submitting Exercises When submitting an exercise, make sure your solution file is in the same directory as the test code. For example, if you're submitting `Bob.m` for the Bob exercise, the submit command would be something like `exercism submit <path_to_exercism_dir>/objective-c/bob/Bob.m`. ## Source Bert, in Mary Poppins [http://www.imdb.com/character/ch0011238/quotes](http://www.imdb.com/character/ch0011238/quotes) ## 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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99 entries across 99 versions & 1 rubygems