From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on starla X-Spam-Level: X-Spam-Status: No, score=0.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_BL_SPAMCOP_NET,SPF_HELO_PASS, SPF_PASS autolearn=no autolearn_force=no version=3.4.6 Received: from nue.mailmanlists.eu (nue.mailmanlists.eu [94.130.110.93]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by dcvr.yhbt.net (Postfix) with ESMTPS id C9FAE1F5CB for ; Mon, 30 Sep 2024 22:16:05 +0000 (UTC) Authentication-Results: dcvr.yhbt.net; dkim=pass (1024-bit key; unprotected) header.d=ml.ruby-lang.org header.i=@ml.ruby-lang.org header.a=rsa-sha256 header.s=mail header.b=azUj93ou; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=ruby-lang.org header.i=@ruby-lang.org header.a=rsa-sha256 header.s=s1 header.b=Ek3l8UTo; dkim-atps=neutral DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ml.ruby-lang.org; s=mail; t=1727734563; bh=bgi7jV+PF211GnkO7GGCP+YTVq1rgb+aSicvK48k5js=; h=Date:References:To:Reply-To:Subject:List-Id:List-Archive: List-Help:List-Owner:List-Post:List-Subscribe:List-Unsubscribe: From:Cc:From; b=azUj93ouhXcqtBlQzhKcRiJr4EDwDsrkEFr+k8vHJyByNxdPhUktyzheMNv8fAKX2 fRRrZmWD8B9/oQ2sU9go/csEehzocHy5F632hWct8Srn/TNasw7QPM2vWsql6WWreY 41gYHTVBZEB2M5B/E1iggKcl4E1x1MvF4HzOZ1MQ= Received: from nue.mailmanlists.eu (localhost [IPv6:::1]) by nue.mailmanlists.eu (Postfix) with ESMTP id 7378F43F2D for ; Mon, 30 Sep 2024 22:16:03 +0000 (UTC) Authentication-Results: nue.mailmanlists.eu; dkim=pass (2048-bit key; unprotected) header.d=ruby-lang.org header.i=@ruby-lang.org header.a=rsa-sha256 header.s=s1 header.b=Ek3l8UTo; dkim-atps=neutral Received: from s.wrqvwxzv.outbound-mail.sendgrid.net (s.wrqvwxzv.outbound-mail.sendgrid.net [149.72.154.232]) by nue.mailmanlists.eu (Postfix) with ESMTPS id 6E07143EB4 for ; Mon, 30 Sep 2024 22:15:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ruby-lang.org; h=from:references:subject:mime-version:content-type: content-transfer-encoding:list-id:to:cc:content-type:from:subject:to; s=s1; bh=x3aHGDxcPwFDXZQHpLTOVBcwLB8fp1x78IEaXXLVFhw=; b=Ek3l8UTorEH+RhKI3ntQSMQ59YwBE6FrSuhm9N5k9iCPAYBU5lMfrFwZe9/xVNQ6tnxD GWxzcEB6N49xLFC5CbBg2i7F8PRPgEeyWMl4VuNMQxzzStNFtdYligtHYG4P7pfUmlPNWd 48lWyJcMd6i3+vmsDsgQJaosutq1ioQaSV60rA7o8jRC8Uk0gLTFToPgUS6PYGCmExSObb ga6XtOMrAZiAxVO89kNt3cNccqMuIac8cwAub1Qaw2hfTpmHbCne00ERGWZUtTWkcKCoHX BlJgs4N7jn2bd1SPbvOafkob2+Gx4FKhuV9J9nHbCb4tLIL7QRewiP5d1GDVPH3A== Received: by recvd-55fc7fd858-ndsmj with SMTP id recvd-55fc7fd858-ndsmj-1-66FB2315-43 2024-09-30 22:15:49.805882852 +0000 UTC m=+1570755.516849593 Received: from herokuapp.com (unknown) by geopod-ismtpd-1 (SG) with ESMTP id WTdIdLfaTe-IjjYUHz828Q for ; Mon, 30 Sep 2024 22:15:49.747 +0000 (UTC) Date: Mon, 30 Sep 2024 22:15:49 +0000 (UTC) Message-ID: References: Mime-Version: 1.0 X-Redmine-Project: ruby-master X-Redmine-Issue-Tracker: Feature X-Redmine-Issue-Id: 20770 X-Redmine-Issue-Author: AlexandreMagro X-Redmine-Issue-Priority: Normal X-Redmine-Sender: ufuk X-Mailer: Redmine X-Redmine-Host: bugs.ruby-lang.org X-Redmine-Site: Ruby Issue Tracking System X-Auto-Response-Suppress: All Auto-Submitted: auto-generated X-Redmine-MailingListIntegration-Message-Ids: 96004 X-SG-EID: =?us-ascii?Q?u001=2EtoxlPY7goenxC35PPmhKmmkfp2fFFKlYTeeCgonqobL7gJhDUe=2FDmBFH=2F?= =?us-ascii?Q?IR+L6I4qzFHsfnxMNAFUsS2aA1fS43BdwF921KP?= =?us-ascii?Q?DGZSBh1Yk7i0OKoJ26KW4k9zYPPVoINHRNiXXzr?= =?us-ascii?Q?lfbrP+Lr1v0ZIHzFYZGVcLB+hyv9h+omRqFtcQ6?= =?us-ascii?Q?QeXv23+F4ze6Ap26W=2FSwM33o6AjjkYnvl0+3fcB?= =?us-ascii?Q?W+0WJJ4xAeYxVoEE=2FNqZpajodZZBkbuHE2KEV3k?= =?us-ascii?Q?B6h=2FpixXbTcxVsKWUAFQdSL4zQ=3D=3D?= To: ruby-core@ml.ruby-lang.org X-Entity-ID: u001.I8uzylDtAfgbeCOeLBYDww== Message-ID-Hash: U46VA3YTKLKGIJFDSEM2RVQYNG3MZ7HZ X-Message-ID-Hash: U46VA3YTKLKGIJFDSEM2RVQYNG3MZ7HZ X-MailFrom: bounces+313651-b711-ruby-core=ml.ruby-lang.org@em5188.ruby-lang.org X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header X-Mailman-Version: 3.3.9 Precedence: list Reply-To: Ruby developers Subject: [ruby-core:119367] [Ruby master Feature#20770] A *new* pipe operator proposal List-Id: Ruby developers Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: From: "ufuk (Ufuk Kayserilioglu) via ruby-core" Cc: "ufuk (Ufuk Kayserilioglu)" Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Issue #20770 has been updated by ufuk (Ufuk Kayserilioglu). AlexandreMagro (Alexandre Magro) wrote in #note-7: > With the pipe operator, the same logic can be simplified and made more readable: > > ``` > client_api_url > |> URI.parse(it) > |> Net::HTTP.get(it) > |> JSON.parse(it).fetch(important_key) > ``` I would like to note that this almost works already today: ```ruby irb> client_api_url = "https://jsonplaceholder.typicode.com/posts/1" #=> "https://jsonplaceholder.typicode.com/posts/1" irb> pipeline = URI.method(:parse) >> Net::HTTP.method(:get) >> JSON.method(:parse) #=> # irb> pipeline.call(client_api_url) #=> {"userId"=>1, "id"=>1, "title"=>"sunt aut facere repellat provident occaecati excepturi optio reprehenderit", "body"=> "quia et suscipit\nsuscipit recusandae consequuntur expedita et cum\nreprehenderit molestiae ut ut quas totam\nnostrum rerum est autem sunt rem eveniet architecto"} irb> pipeline = URI.method(:parse) >> Net::HTTP.method(:get) >> JSON.method(:parse) >> -> { it.fetch("title") } #=> # irb> pipeline.call(client_api_url) #=> "sunt aut facere repellat provident occaecati excepturi optio reprehenderit" ``` You can also make the whole pipeline with just using procs: ```ruby (-> { URI.parse(it) } >> -> { Net::HTTP.get(it) } >> -> { JSON.parse(it) } >> -> { it.fetch("title") }).call(client_api_url) #=> "sunt aut facere repellat provident occaecati excepturi optio reprehenderit" ``` which is much closer to the syntax that you want, except for the lambda wrappers. I think with `Proc#>>` and `Proc#<<` this need for chaining is mostly in place already. The thing that is really missing is the ability to access a method by name without having to do `.method(:name)` which was proposed in https://bugs.ruby-lang.org/issues/16264. That proposal would make the first example be: ```ruby (URI.:parse >> Net::HTTP.:get >> JSON.:parse >> -> { it.fetch("title") }).call(client_api_url) #=> "sunt aut facere repellat provident occaecati excepturi optio reprehenderit" ``` which looks much nicer. ---------------------------------------- Feature #20770: A *new* pipe operator proposal https://bugs.ruby-lang.org/issues/20770#change-109980 * Author: AlexandreMagro (Alexandre Magro) * Status: Open ---------------------------------------- Hello, This is my first contribution here. I have seen previous discussions around introducing a pipe operator, but it seems the community didn't reach a consensus. I would like to revisit this idea with a simpler approach, more of a syntactic sugar that aligns with how other languages implement the pipe operator, but without making significant changes to Ruby's syntax. Currently, we often write code like this: ```ruby value = half(square(add(value, 3))) ``` We can achieve the same result using the `then` method: ```ruby value = value.then { add(_1, 3) }.then { square(_1) }.then { half(_1) } ``` While `then` helps with readability, we can simplify it further using the proposed pipe operator: ```ruby value = add(value, 3) |> square(_1) |> half(_1) ``` Moreover, with the upcoming `it` feature in Ruby 3.4 (#18980), the code could look even cleaner: ```ruby value = add(value, 3) |> square(it) |> half(it) ``` This proposal uses the anonymous block argument `(_1)`, and with `it`, it simplifies the code without introducing complex syntax changes. It would allow us to achieve the same results as in other languages that support pipe operators, but in a way that feels natural to Ruby, using existing constructs like `then` underneath. I believe this operator would enhance code readability and maintainability, especially in cases where multiple operations are chained together. Thank you for considering this proposal! -- https://bugs.ruby-lang.org/ ______________________________________________ ruby-core mailing list -- ruby-core@ml.ruby-lang.org To unsubscribe send an email to ruby-core-leave@ml.ruby-lang.org ruby-core info -- https://ml.ruby-lang.org/mailman3/lists/ruby-core.ml.ruby-lang.org/