iterator: Add IteratorUtil::flat_map_ method
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flat_map_ produces an iterator that maps each element to an iterator, and yields the elements of the produced iterators. This is the monadic bind :: M a -> (a -> M b) -> M b for iterators. Named just like the vec method, but with a trailing underline until the method resolution bug is resolved.
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r? @thestinger thanks |
bors
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flat_map_ produces an iterator that maps each element to an iterator, and yields the elements of the produced iterators. This is the monadic bind :: M a -> (a -> M b) -> M b for iterators. Named just like the vec method, but with a trailing underline until the method resolution bug is resolved. We discussed the name chain_map, but I decided to go with flat_map_ for consistency with vec. Since it.map(f).flatten() would be the same as it.flat_map(f), we could choose to just implement a flatten method instead. Either way the possibilities are the same but flat_map is more convenient.
flip1995
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Jun 17, 2021
Remove requirement of fully qualified path for disallowed_method/type changelog: Remove the need for fully qualified paths in disallowed_method and disallowed_type After fixing this issue in [import_rename](rust-lang/rust-clippy#7300 (comment)) I figured I'd fix it for these two. If this does in fact fix the **Known problems:** section I was planning to remove them from both lints after confirmation.
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flat_map_ produces an iterator that maps each element to an iterator,
and yields the elements of the produced iterators.
This is the monadic bind :: M a -> (a -> M b) -> M b for iterators.
Named just like the vec method, but with a trailing underline until the
method resolution bug is resolved.
We discussed the name chain_map, but I decided to go with flat_map_ for consistency with vec.
Since it.map(f).flatten() would be the same as it.flat_map(f), we could choose
to just implement a flatten method instead. Either way the possibilities are the same but flat_map is more convenient.