Linear search search for an element in an array, we can use the algorithms code example

Example: linear search

def global_linear_search(target, array)
  counter = 0
  results = []

  while counter < array.length
    if array[counter] == target
      results << counter
      counter += 1
    else
      counter += 1
    end
  end

  if results.empty?
    return nil
  else
    return results
  end
end