Ruby on Rails

When I looked at your code sample, I immediately thought that I should look at the Ruby Integer, Emumerable  and Array API.  I reviewed them....
On review of the Ruby Integer API revealed the method .odd?
On review of the Ruby Array API revealed the methods .select
On review of the Ruby Enumerable API revealed the methods .reduce

So I built the solution, but from what I learned that are many possibilities, and admittedly this solutions may not be the best or the fastest

my_odd_ball_sum =  numbers.select {|n| n.odd?}.reduce(:+)

Breakdown...

numbers.select

Returns a new array containing all elements of ary for which the given block returns a true value.

numbers.select {|n| n.odd?}  returns an Enumerator, so then apply reduce(:+)

Combines all elements of enum by applying a binary operation, specified by a block or a symbol that names a method or operator.

My point is that it is a good idea/investment to explore Ruby API for solutions.
Hope this helps
Liz


On Monday, August 3, 2015 at 10:57:08 PM UTC-4, Ruby-Forum.com User wrote:

Hi,

I am new to Ruby on Rails.  I am practicing problems to better
understand coding.  I understand the logic but I am not able to put in
proper codes.  Could someone please solve the following problem for me?

oddball_sum
Write a function oddball_sum(numbers), which takes in an array of
integers and returns the sum of all the odd elements.

oddball_sum(numbers)
i = 0
while i < numbers.length
if (numbers % 2 !== 0)
return numbers[i] += 1
i += 1
end
return result
end

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