> On Nov 15, 2017, at 11:07 PM, Gwendal Roué via swift-evolution
> <swift-evolution@swift.org> wrote:
>
>
>> Le 16 nov. 2017 à 06:29, Matt Gallagher via swift-evolution
>> <swift-evolution@swift.org <mailto:swift-evolution@swift.org>> a écrit :
>>
>> My opinion is that filterMap is the right choice of name.
>>
>> I'm completely biased, given that I already have a Swift library that uses
>> filterMap, in exactly this context, for a Reactive Programming library:
>>
>>
>> https://github.com/mattgallagher/CwlSignal/blob/22f1d47895896d7b55bc59a4ee5394071f3c84cf/Sources/CwlSignal/CwlSignalReactive.swift#L453?ts=3
>>
>> <https://github.com/mattgallagher/CwlSignal/blob/22f1d47895896d7b55bc59a4ee5394071f3c84cf/Sources/CwlSignal/CwlSignalReactive.swift#L453?ts=3>
>
> Another popular Reactive Programming Library uses filterMap with a different
> signature, and a different meaning:
> https://github.com/RxSwiftCommunity/RxSwiftExt/blob/3.0.0/Source/RxSwift/filterMap.swift#L32
>
> <https://github.com/RxSwiftCommunity/RxSwiftExt/blob/3.0.0/Source/RxSwift/filterMap.swift#L32>
>
> There are already different interpretations on "filter" in "filterMap" in the
> wild.
>
> Gwendal Roué
>
This library is using filterMap in exactly the same way proposed, except that
they use a custom result type instead of Optional. So yes, it has a different
signature, but I don’t think it has a different meaning. It’s still running a
map operation that may filter some values out.
-BJ
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