itertools

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New iterize() function?

5

Hi folks. Is the iterize() function demonstrated below of any interest? It's rather like itertools::iterate(), making it easy to create a certain class of iterators via something like induction. But...

NicholasSterling

Chunks is not Sync

2

I'd like to use a shared iterator to dispense work items to threads, but it seems I can't. Is this intentional? Is there a better way to do this with...

hspug

Itertools::join

8

Our current `join` only outputs `String`, maybe we should consider using the nightly `Join` in standard library? I created a pull request using that in standard library but I noticed...

pickfire

flat_map_ok

3

Similar to #522, which defines `flatten_ok`, there could also be a `flat_map_ok` which operates on an `IntoIter`, applies a function to `T` if the value is `Ok` and flattens the...

oberien

Add a note about how to permute with replacement

1

Currently, trying to get 'permutations with replacement', it's hard to find in the documentation how to do that. I eventually found on the github from the issue about adding permutations...

CraftSpider

deref_cloned() ?

5

I wonder if we should have a `deref_cloned()` that did `.map(|s| (*s).clone())`? I see a few situations where people do cloned().cloned() to achieve the same effect (though I suspect that's...

gilescope

Implement peeking_fold_while

5

## Issue `try_fold` is capable of folding an iterator until a short-circuiting condition is met. For instance, the [short-circuiting example in the docs](https://doc.rust-lang.org/std/iter/trait.Iterator.html#examples-28) sums up integers until an integer overflow...

mingyli

Product and MultiProduct should implement ExactSizeIterator if all the constituent iterators implement it

6

Thanks for itertools! It's super useful :) I do have one feature request: I love the Cartesian product iterators because they were just what I wanted for a use case,...

sunshowers

Add CombinationsByLen iterator

1

Closes #330 . Sometimes we need to iterate over all possible combinations of an infinite iterator. This means that every combination must be eventually met. This PR implements such a...

fyrchik

Feature request: incremental sort

2

An incremental sort would make an excellent addition to itertools's lazy iterator model. The basic idea of an incremental sort is that you can sort the sequence one element at...

Lucretiel