Feature #17608
Updated by sawa (Tsuyoshi Sawada) almost 4 years ago
Many use cases of `Array#sum` are preceded with the `compact` method or followed a block to ensure the value is addable.
```ruby
a = [1, nil, 2, 3]
a.sum # !> TypeError
a.compact.sum # => 6
a.sum{_1 || 0} # => 6
```
I propose there should be a way to do that in one step. I request either of the following:
A. `array#filter_sum` method
```ruby
a.filter_sum # => 6
```
B. An option for `Array#sum`
```ruby
a.sum(compact: true) # => 6
```