Exercise 5: Retrieve and Recombine Elements of an Array

Make a new array out of an existing one by combining certain elements of the array.

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Problem statement

You’re given the following array:

array = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]

Make a new array with the following output:

result = [2, 4, 6]

Try it yourself

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def combine_elements(input_array)
  result = []
  # Start your code here
  
  return result
end

The given solution is inelegant, but it at least shows how we can use the value returned from an array lookup and immediately create a new array.

A more elegant solution to this uses the select method. However, we’ll need to learn more about methods and blocks before we’ll be able to fully understand it!