From: "Martin J. Dürst" <duerst@...>
Date: 2016-11-05T10:43:44+09:00
Subject: [ruby-core:77956] Re: [Ruby trunk Feature#12902] How about Enumerable#sum uses initial value rather than 0 as default?

On 2016/11/05 04:28, aaron.lasseigne@gmail.com wrote:
> Issue #12902 has been updated by Aaron Lasseigne.

> In https://bugs.ruby-lang.org/issues/12217#note-3, Akira Tanaka, mentions that the default argument to sum is 0. This creates problems with non-numeric summations (e.g. strings). I would like to suggest using the first enumerable value. This would make the method more flexible. It also makes it behave more like reduce. I think using the initial value in the enumerable is less surprising than using 0.

What would/should the behavior be for an empty array?

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