Problem Statement
Given a custom class MyArray,
write a 'sum' method that takes a block parameter.
my_array = MyArray.new([1, 2, 3])
my_array.sum gives 6
my_array.sum(10) gives 16
my_array.sum(0) {|n| n ** 2 } gives 14
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Given a custom class MyArray,
write a 'sum' method that takes a block parameter.
my_array = MyArray.new([1, 2, 3])
my_array.sum gives 6
my_array.sum(10) gives 16
my_array.sum(0) {|n| n ** 2 } gives 14
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