[#84867] [Ruby trunk Bug#14357] thread_safe tests suite segfaults — v.ondruch@...

Issue #14357 has been reported by vo.x (Vit Ondruch).

11 messages 2018/01/15
[#85364] Re: [Ruby trunk Bug#14357] thread_safe tests suite segfaults — Eric Wong <normalperson@...> 2018/02/03

[email protected] wrote:

[#84980] [Ruby trunk Feature#13618][Assigned] [PATCH] auto fiber schedule for rb_wait_for_single_fd and rb_waitpid — hsbt@...

Issue #13618 has been updated by hsbt (Hiroshi SHIBATA).

10 messages 2018/01/23
[#85012] Re: [Ruby trunk Feature#13618][Assigned] [PATCH] auto fiber schedule for rb_wait_for_single_fd and rb_waitpid — Eric Wong <normalperson@...> 2018/01/23

[email protected] wrote:

[ruby-core:85109] [Ruby trunk Feature#14399] Add Enumerable#product

From: shevegen@...
Date: 2018-01-25 10:42:37 UTC
List: ruby-core #85109
Issue #14399 has been updated by shevegen (Robert A. Heiler).


> which is a little longer, but I think is more accurately
> descriptive and intuitive.

We are back to the ancient problem - giving things good names. :-)

The only name from the above that I like is .sum - the others
do not tell me much at all. ;-)

I am not sure what .combinations would do - then again I also
never fully understood the name .reduce() either. People
often associate different actions with the same (but also 
different) names.

----------------------------------------
Feature #14399: Add Enumerable#product
https://bugs.ruby-lang.org/issues/14399#change-69822

* Author: jzakiya (Jabari Zakiya)
* Status: Open
* Priority: Normal
* Assignee: 
* Target version: 
----------------------------------------
For similar reasons for creating `Enumerable#sum` a companion method
`Enumerable#product` is also very useful. Taking the product of
numbers in arrays is a common operation in many numerical algorithms,
especially in number theory and cryptography, and its optimization in
Ruby will make it more conducive to math heavy algorithms and tasks.

This

```
> [2,3,5,7].reduce(:*) => 210
```

can be optimized to this

```
> [2,3,5,7].product => 210
```

It should also allow an initial value

```
> [2,3,5,7].product(2) => 420

> [2,3,5,7].product(0.5) => 105
```
Crystal already has this `method`.



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