Exercise 3: Sum the Rows of a Matrix
Explore how to sum each row in a matrix represented as a nested array using Ruby blocks. This lesson helps you understand iterators and return values in practice, building your skills in Ruby programming with arrays and blocks.
We'll cover the following...
We'll cover the following...
Problem statement
In this exercise, you’re given a nested array. Sum the entries in each row of the matrix and return an array containing these sums.
Example
For example, consider the following array:
nested_array = [
[1, 2, 3],
[4, 5, 6],
[7, 8, 9]
]
We get the following output in return:
[6, 15, 24]