Issue #4539 has been updated by matz (Yukihiro Matsumoto).


* The name `zip_with` is too confusing with `zip`. We need a new name.
* The behavior can be described by the combination of `zip` and `map`.
* I am not sure how much we need this behavior (yet).

Matz.



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Feature #4539: Array#zip_with
https://bugs.ruby-lang.org/issues/4539#change-82857

* Author: citizen428 (Michael Kohl)
* Status: Assigned
* Priority: Normal
* Assignee: matz (Yukihiro Matsumoto)
* Target version: 
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Inspired by Haskell's `zipWith` function, I hacked on together for Ruby:

```ruby
[1,2,3].zip_with([6,5,4], :+) #=> [7, 7, 7]
[1,2,3].zip_with([6,5,4]) { |a,b| 3*a+2*b } #=> [15, 16, 17]
```

So far I only have a Ruby version of it:

https://gist.github.com/731702b90757e21cadcb

My questions:

1. Would this method be considered a worthwhile addition to `Array`?

2. I've never hacked on the C side of Ruby (read some parts of the source though) and my C is quite rusty. I'd like to change that, would somebody be willing to help me turn this into a proper patch?





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