example of a function that takes only the first two elements of an array and joins their indexes as an integer in ruby

To create a function in Ruby that takes only the first two elements of an array and joins their indexes as an integer, you can use the following code:

main.rb
def join_indexes(arr)
  "#{arr[0]}#{arr[1]}".to_i
end
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4 lines

Here's how it works:

1. The join_indexes function takes an arr parameter, which is the input array.
2. It uses array indexing to access the first element (arr[0]) and the second element (arr[1]).
3. Then, it concatenates the indexes together as a string using the #{} syntax.
4. Finally, it converts the resulting string to an integer using the to_i method and returns the integer.

Here's an example usage of this function:

main.rb
array = [5, 2, 7, 9, 1]
result = join_indexes(array)
puts result
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Output:

main.rb
52
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2 lines

In this example, the function takes the first two elements of the array, which are 5 and 2, and joins their indexes as an integer, resulting in 52.