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In #340 `scan::execute` has several layers of nested iterators. This leads to many calls to `flatten_ok` to manage the deep nesting. All the `flatten_ok`'s make the code unclear and harder to reason a…
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## Feature Request
Sometimes I want to return an empty iterator and I haven't found a way of doing this without allocations.
I think `Iterator(T).empty` would be a nice addition.
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```rs
fn main() {
let arr = [1, 2, 3];
if !arr.into_iter().any(|num| num == 4) {
println!("foo");
}
}
```
> Apply De Morgan's law to `Iterator::any`
This name is not very descrip…
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### Background and motivation
Today, I found myself in a situation where I wanted to customize how `Where` works on one of my collection types.
Some possible solutions I've thought up included s…
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_Cpp17InputIterator_ requires `a->m` to be a valid production, which `__bit_iterator` lacks. Although `bool` doesn't have any members to access, `it->~value_type()` should still be valid due to pseudo…
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```std::views::join``` on ```beman::optional26::optional``` doesn't work in constexpr context in my code https://godbolt.org/z/Ed11G66s3 (switch preprocessor if 1 to see error)
This code doesn't wo…
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Filter out the cancelled and expired deals to avoid these cases:
```go
am.keeper.IterateDeals(ctx, func(deal types.Deal) bool {
switch deal.Status {
case types.Deal_EXPIRED:
return f…
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### Is your feature request related to a problem? Please describe.
As stated in title, I would like to erase some element in a STL container, say Multiset.
```cython
cdef multiset[int] my_multise…
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(Discussed during Bernstein conference with @babsey @heplesser @terhorstd @poojanbabu)
In the future it may be desirable to support creating arbitrary nested groups of populations in NEST the way it…
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seems to be causing a issue with creating houses or doors in general because it doesn't show that a door is there when you try to set one, for housing aim at it or press e doesn't work sends back this…