How do you add an array to another array in Ruby and not end up with a multi-dimensional result?

To combine the elements of one array with another without creating a nested array, you can use either + or concat:

array1 = [1, 2, 3]
array2 = [4, 5, 6]

# Using + (returns a new array)
new_array = array1 + array2
puts new_array.inspect 
# => [1, 2, 3, 4, 5, 6]

# Using concat (modifies the existing array)
array1.concat(array2)
puts array1.inspect
# => [1, 2, 3, 4, 5, 6]

By contrast, using push or << on array1 with array2 would add the entire second array as a single element, resulting in a nested (multi-dimensional) structure.

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