-1, for the same reasons stated on the thread. These are neither guaranteed to 
be mutating or non-mutating until you get to Collection.

Changing map() to mapped() would be lying to the developer some of the time 
about the mutability of the interface.

-DW

> On Jun 16, 2016, at 1:53 PM, Adrian Zubarev via swift-evolution 
> <[email protected]> wrote:
> 
> +1 very much for consistency. 
> 
> 
> 
> 
> -- 
> Adrian Zubarev
> Sent with Airmail
> 
> Am 16. Juni 2016 um 21:51:48, Patrick Pijnappel via swift-evolution 
> ([email protected] <mailto:[email protected]>) schrieb:
> 
>> Due to considerably support on this thread 
>> <http://news.gmane.org/find-root.php?group=gmane.comp.lang.swift.evolution&article=20783>,
>>  a draft proposal to revisit the core functional method exceptions to the 
>> -ed/-ing rule.
>> 
>> Online version: 
>> https://github.com/PatrickPijnappel/swift-evolution/blob/functional-methods-ed-ing/proposals/XXXX-functional-methods-ed-ing.md
>>  
>> <https://github.com/PatrickPijnappel/swift-evolution/blob/functional-methods-ed-ing/proposals/XXXX-functional-methods-ed-ing.md>
>> 
>> Apply -ed/-ing rule to core functional methods
>> 
>> Proposal: SE-NNNN 
>> <https://github.com/PatrickPijnappel/swift-evolution/blob/functional-methods-ed-ing/proposals/NNNN-functional-methods-ed-ing.md>
>> Author: Patrick Pijnappel <https://github.com/PatrickPijnappel>
>> Status: Awaiting review
>> Review manager: TBD
>>  
>> <https://github.com/PatrickPijnappel/swift-evolution/blob/functional-methods-ed-ing/proposals/XXXX-functional-methods-ed-ing.md#introduction>Introduction
>> 
>> The Swift API Guidelines standardizes non-mutating method forms on verbs 
>> ending in -ed/-ing (or nouns). However, a few non-mutating forms have been 
>> kept as "Terms of Art": map, flatMap, filter, reduce, dropFirst and 
>> dropLast. This proposal proposes to bring these in line with all other 
>> non-mutating forms (e.g. filter => filtered).
>> 
>> Swift-evolution threads: Source 
>> <http://news.gmane.org/find-root.php?group=gmane.comp.lang.swift.evolution&article=20783>
>>  
>> <https://github.com/PatrickPijnappel/swift-evolution/blob/functional-methods-ed-ing/proposals/XXXX-functional-methods-ed-ing.md#motivation>Motivation
>> 
>> These method have been kept to preserve the terms of art. Generally, this 
>> can have significant benefits:
>> 
>> Anyone familiar with the term will immediately understand it, and use their 
>> assumptions about how it works.
>> Users learning the term from Swift can use their knowledge when encountering 
>> it elsewhere.
>> Experienced users will be able to use the mental pattern matching they've 
>> built-up for quickly recognizing common programming patterns.
>> However, basically all of the benefits of using a term of art still apply to 
>> the modified forms: – For recognition, the modified forms are still very 
>> close to the traditional terms of art. So both coming to and from Swift 
>> you'll be able to use your knowledge pretty much unaffected. 
>> 
>> If the user looks for e.g. filter they are pretty much guaranteed to quickly 
>> find the correct form, be it through code-completion, google or a fix-it.
>> There isn't really any violation of assumptions that might cause problems in 
>> this case.
>> Any mental pattern matching will likely transfer quickly due to the minimal 
>> difference.
>>  
>> <https://github.com/PatrickPijnappel/swift-evolution/blob/functional-methods-ed-ing/proposals/XXXX-functional-methods-ed-ing.md#proposed-solution>Proposed
>>  solution
>> 
>> The proposed solution modifies the method verbs to their -ed/-ing forms 
>> (preferring the former). 
>> 
>> It removes the last clear exceptions to the -ed/-ing rule from the standard 
>> library, which previously were exactly the opposite of what one would expect 
>> based on the API guidelines (and the rest of the language).
>> 
>> It also aids users in learning to pattern match on the -ed/-ing rule and 
>> internalizing the API guidelines, since now all methods are named this way – 
>> instead of the most commonly used methods defying the normal pattern.
>> 
>>  
>> <https://github.com/PatrickPijnappel/swift-evolution/blob/functional-methods-ed-ing/proposals/XXXX-functional-methods-ed-ing.md#detailed-design>Detailed
>>  design
>> 
>> The change would rename the following method families:
>> 
>> map       => mapped
>> flatMap   => flatMapped  
>> filter    => filtered
>> reduce    => reduced
>> dropFirst => droppingFirst
>> dropLast  => droppingLast
>>  
>> <https://github.com/PatrickPijnappel/swift-evolution/blob/functional-methods-ed-ing/proposals/XXXX-functional-methods-ed-ing.md#impact-on-existing-code>Impact
>>  on existing code
>> 
>> The Swift migrator and fix-its would be provided for the change. 
>> 
>>  
>> <https://github.com/PatrickPijnappel/swift-evolution/blob/functional-methods-ed-ing/proposals/XXXX-functional-methods-ed-ing.md#alternatives-considered>Alternatives
>>  considered
>> 
>> Alternatively -ing suffixes could be used for map/flatMap/filter/reduce. 
>> However, these are normally reserved for when -ed doesn't really work (e.g. 
>> droppedFirst).
>> _______________________________________________
>> swift-evolution mailing list
>> [email protected]
>> https://lists.swift.org/mailman/listinfo/swift-evolution
> 
> 
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