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How to flatten multi-dimensional arrays into one in Ruby
okwudili onyejiaku
An array that is not one-dimensional can be flattened in Ruby using the flatten method. It recursively flattens the array and returns a new array that is one-dimensional.
Syntax
array.flatten
Parameters
This method takes no parameters.
Return value
A new array is returned that is one-dimensional.
Code example
In the example below, we will create some dimensional arrays and flatten them to a one-dimensional array using the flatten method.
# create arrays
arr1 = [1, 2, [3, 4]]
arr2 = [[1, 2, 3,], [4, 5, 6]]
arr3 = ["a","b",["a", "b", ["a", "b"]]]
# flatten the arrays
a = arr1.flatten
b = arr2.flatten
c = arr3.flatten
# print out returned values
puts "#{a}"
puts "#{b}"
puts "#{c}"Array flatten() Function
RELATED TAGS
ruby
flatten
array
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