The even more sensible thing is to take an optional argument: a function that is... | Hacker News

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wool_gather on March 16, 2019 | parent | context | favorite | on: Why Operators Are Useful

The even more sensible thing is to take an optional argument: a function that is passed the conflicting keys and their values, and must resolve the conflict. If `None` is passed, then a documented default is taken.

pacala on March 16, 2019 [–]

It’s an operator, there are no optional arguments. Though it’s OK to also have a function like you propose.

gpderetta on March 16, 2019 | [–]

Recursively calling the operator is an option.

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