Ruby Issue Tracking System

07/30/2020

07:16 PM Ruby master Feature #17016: Enumerable#scan_left

I'd like to sum up where we're at with this discussion. Let me know if you disagree with my interpretation here!
1... parker (Parker Finch)

07/23/2020

03:39 PM Ruby master Feature #17016: Enumerable#scan_left

nobu (Nobuyoshi Nakada) wrote in #note-20:
> With https://github.com/ruby/ruby/pull/3337, you can
> ```ruby
> (1..... parker (Parker Finch)

07/22/2020

05:23 PM Ruby master Feature #17016: Enumerable#scan_left

matz (Yukihiro Matsumoto) wrote in #note-17:
> I don't see any real-world use-case for `scan_left`. Is there any?
... parker (Parker Finch)

07/17/2020

02:29 PM Ruby master Feature #17016: Enumerable#scan_left

mame (Yusuke Endoh) wrote in #note-14:
> Is this what you want?
>
> ```
> irb(main):001:0> (1..).lazy.enum_for(:... parker (Parker Finch)

07/14/2020

06:20 PM Ruby master Feature #17016: Enumerable#scan_left

Eregon (Benoit Daloze) wrote in #note-6:
> Maybe `prefix_sum` or just `prefix` or something like that would work?
>... parker (Parker Finch)

05:50 PM Ruby master Feature #17016: Enumerable#scan_left

shyouhei (Shyouhei Urabe) wrote in #note-10:
> It might be possible to let inject be lazy if we ignore backwards com... parker (Parker Finch)

07/10/2020

08:57 PM Ruby master Feature #17016: Enumerable#scan_left

> The name `scan` seems confusing at least, since it has nothing to do with `String#scan`.
> And `*_left` has no pre... parker (Parker Finch)

07/09/2020

08:34 PM Ruby master Misc #17019: DevelopersMeeting20200720Japan

* [Feature #17016] Enumerable#scan_left (parker)
* There is a [pull request](https://github.com/ruby/ruby/pull/307... parker (Parker Finch)

07/08/2020

02:51 PM Ruby master Feature #17016: Enumerable#scan_left

sawa (Tsuyoshi Sawada) wrote in #note-1:
> What is wrong with the following?
>
> ```ruby
> [1, 2, 3].inject([0])... parker (Parker Finch)

07/07/2020

05:48 PM Ruby master Feature #17016 (Open): Enumerable#scan_left

## Proposal
Add a `#scan_left` method to `Enumerable`.
(The name "scan_left" is based on Scala's scanLeft and H... parker (Parker Finch)