The name may be not the best. It has mathematical roots. But everyone is used to it. It's like "lambda" :) Who could ever imagine that the greek letter is an anonymous function. But as well as "identity" is the most understandable and familiar name for fp-fans. People look for it by intuition https://stackoverflow.com/questions/35616191/is-there-an-identity-function-in-elixir
Thus I consider the "identity" name the best option вторник, 2 июля 2019 г., 21:40:45 UTC+3 пользователь José Valim написал: > > Thanks Chris, it is important that someone being counter arguments, even > if they can be disproved. :) > > I definitely see how such a small function can be useful but, at the same > time, I am not convinced about the name "identity". > > I found it curious that Clojure actually have an identity function because > the definition of Identity they use when talking about values and change is > a more complex one (and one that really stuck with me): > > *> By identity I mean a stable logical entity associated with a series of > different values over time* > > https://clojure.org/about/state#_working_models_and_identity > > Of course, my interpretation above is likely uncommon and there are other > interpretations of identity that would fit nicely. > > Anyway, to move the discussion forward, can someone do a more complete > survey on what this function are called in many of the other languages? I > just want to make sure we do our due diligence before adding it to the > language. > > Thank you, > > *José Valim* > www.plataformatec.com.br > Skype: jv.ptec > Founder and Director of R&D > > > On Tue, Jul 2, 2019 at 8:25 PM Christopher Keele <christ...@gmail.com > <javascript:>> wrote: > >> Derp, I knew that. Good point. >> >> On Tue, Jul 2, 2019 at 9:55 AM Michał Muskała <mic...@muskala.eu >> <javascript:>> wrote: >> >>> Because Elixir is a lisp-2 language, variables and functions are in >>> different "namespaces". This means you can have local variables with names >>> of local functions without any issues, but it also means you need different >>> syntax when you want to call a function contained in a variable. Or >>> formulated differently - variables can't shadow functions. For example, >>> consider: >>> >>> bar = &foo/0 >>> bar.() #=> 1 >>> bar() #=> 2 >>> def foo(), do: 1def bar(), do: 2 >>> >>> Having a Kernel.id/1 function would not preclude you from using variables >>> called id. >>> >>> >>> Michał. >>> On 2 Jul 2019, 18:41 +0200, Christopher Keele <christ...@gmail.com >>> <javascript:>>, wrote: >>> >>> I'd cast my vote against this. The proposal seems to be: >>> >>> 1. Create a function named 'id' or some such >>> 2. Put it in the Kernel namespace (so it need not be prefixed) >>> >>> I've been doing a lot of python lately and they have a lot of things >>> like this, including the same 'filter' global function mentioned in this >>> thread. >>> >>> Points against: >>> >>> 1. It'd suck to not be able to use 'id' as a variable name, and would >>> conflict with a lot of existing code. >>> 2. Alternative names to 'id' or namespacing it are not shorter than >>> '&(&1)' >>> 3. '&(&1)' is more open to change with requirements >>> 4. Adopting 'id' within Kernel would encourage adding more utility >>> functions to it, exacerbating 1, like the proposed 'filter' function >>> 5. Not adopting it within the Kernel would be hard, as there's no real >>> appropriate place for it elsewhere in standard lib, unlike Enum's 'filter' >>> >>> Generally it's a nice idea, but I can't think of a great way to make it >>> work, and it'd open the floodgates to more utility functions that I've come >>> to find grating in day-to-day python development. >>> >>> Just my two cents, >>> Chris K >>> >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "elixir-lang-core" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to elixir-l...@googlegroups.com <javascript:>. >>> To view this discussion on the web visit >>> https://groups.google.com/d/msgid/elixir-lang-core/fffd5b76-4385-40de-93bd-148f1b94bb27%40googlegroups.com >>> >>> <https://groups.google.com/d/msgid/elixir-lang-core/fffd5b76-4385-40de-93bd-148f1b94bb27%40googlegroups.com?utm_medium=email&utm_source=footer> >>> . >>> For more options, visit https://groups.google.com/d/optout. >>> >>> -- >>> You received this message because you are subscribed to a topic in the >>> Google Groups "elixir-lang-core" group. >>> To unsubscribe from this topic, visit >>> https://groups.google.com/d/topic/elixir-lang-core/tB61BHYIH1s/unsubscribe >>> . >>> To unsubscribe from this group and all its topics, send an email to >>> elixir-l...@googlegroups.com <javascript:>. >>> To view this discussion on the web visit >>> https://groups.google.com/d/msgid/elixir-lang-core/b2149582-b8ba-4759-99ac-a634f73f3243%40Spark >>> >>> <https://groups.google.com/d/msgid/elixir-lang-core/b2149582-b8ba-4759-99ac-a634f73f3243%40Spark?utm_medium=email&utm_source=footer> >>> . >>> For more options, visit https://groups.google.com/d/optout. >>> >> -- >> You received this message because you are subscribed to the Google Groups >> "elixir-lang-core" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to elixir-l...@googlegroups.com <javascript:>. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/elixir-lang-core/CAD9kT2R41gmZXU9_YAqAdyJQDP-M37j-mgUet-okoeBzF%3DdMDA%40mail.gmail.com >> >> <https://groups.google.com/d/msgid/elixir-lang-core/CAD9kT2R41gmZXU9_YAqAdyJQDP-M37j-mgUet-okoeBzF%3DdMDA%40mail.gmail.com?utm_medium=email&utm_source=footer> >> . >> For more options, visit https://groups.google.com/d/optout. >> > -- You received this message because you are subscribed to the Google Groups "elixir-lang-core" group. 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