From: manga.osyo@gmail.com
To: ruby-core@ruby-lang.org
Subject: [ruby-core:95486] [Ruby master Feature#16273] Proposal: Shorthand operator for "#instance_method"
Date: Wed, 23 Oct 2019 00:47:37 +0000 (UTC) [thread overview]
Message-ID: <redmine.issue-16273.20191023004736.a2a97cd742fe2d58@ruby-lang.org> (raw)
In-Reply-To: redmine.issue-16273.20191023004736@ruby-lang.org
Issue #16273 has been reported by osyo (manga osyo).
----------------------------------------
Feature #16273: Proposal: Shorthand operator for "#instance_method"
https://bugs.ruby-lang.org/issues/16273
* Author: osyo (manga osyo)
* Status: Open
* Priority: Normal
* Assignee:
* Target version:
----------------------------------------
hi, created issues to discuss shorthand for "#instance_method"
## Overview
Ruby 2.7 adds a `#method` shorthand `.:` operator.
* [Feature #12125: Proposal: Shorthand operator for Object#method - Ruby master - Ruby Issue Tracking System](https://bugs.ruby-lang.org/issues/12125)
* [Feature #13581: Syntax sugar for method reference - CommonRuby - Ruby Issue Tracking System](https://bugs.ruby-lang.org/issues/13581)
In this issues want to discuss the shorthand operator for "#instance_method".
## Background
If you want to pass an array to `Array#zip` or `Hash#merge` as shown below, the code will be messy.
```ruby
arrays = [["a", "b"], ["c"], ["d", "e"]]
hashs = [{"a" => 1}, {"b" => 2, "c" => 3}, {"d" => 4, "e" => 5}]
# `#first` must be a receiver and the value excluding `#first` must be passed as an argument
arrays.first.zip(*arrays.drop(1))
arrays.first.product(*arrays.drop(1))
hashs.first.merge(*hashs.drop(1))
```
This can be solved by using `# bind_call` ([# 15955] (https://bugs.ruby-lang.org/issues/15955)).
```ruby
arrays = [["a", "b"], ["c"], ["d", "e"]]
hashs = [{"a" => 1}, {"b" => 2, "c" => 3}, {"d" => 4, "e" => 5}]
Array.instance_method(:zip).bind_call(*arrays)
Array.instance_method(:product).bind_call(*arrays)
Hash.instance_method(:merge).bind_call(*hashs)
```
But `#instance_method` is long.
I'm thinking shorthand operator for `#instance_method`.
:MEMO: There was a suggestion to add `Array.zip` or `Array.product` in the past
* [Feature #8970: Array.zip and Array.product - Ruby master - Ruby Issue Tracking System](https://bugs.ruby-lang.org/issues/8970)
* [Feature #6499: Array::zip - Ruby master - Ruby Issue Tracking System](https://bugs.ruby-lang.org/issues/6499)
* [Feature #7444: Array#product_set - Ruby master - Ruby Issue Tracking System](https://bugs.ruby-lang.org/issues/7444)
## Proposal new operator
I can't come up with a suitable operator yet, sorry...
However, considering the `.:` operator, I think "operator + Symbol (`:`)" is good.
```ruby
# Document-like writing
# `#` + operator
Array#zip
Array.#zip
Array#:zip
# Constant-link writing
# :: + :hoge
Array:::zip
Array::#zip
```
Also, the following syntax is valid at this time, so it may be difficult to adopt.
```ruby
Array!zip
Array@zip
Array&zip
Array:zip
```
Please comment if you are interested in the shorthand operator for `# instance_method`.
* Other `#instance_method` usecase
* Proposal shorthand operator
* etc...
Thank you! :)
--
https://bugs.ruby-lang.org/
next parent reply other threads:[~2019-10-23 0:47 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <redmine.issue-16273.20191023004736@ruby-lang.org>
2019-10-23 0:47 ` manga.osyo [this message]
2019-10-23 6:45 ` [ruby-core:95490] [Ruby master Feature#16273] Proposal: Shorthand operator for "#instance_method" nobu
2019-10-23 6:49 ` [ruby-core:95491] " naruse
2019-10-23 7:12 ` [ruby-core:95492] " muraken
2019-10-23 7:50 ` [ruby-core:95494] " zverok.offline
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