How does one concatenate or `union()` to HashSets in rust?#rust
I found it. It is not `union()` but `extend()`.
#rust
@dragnucs Oh yes, it is a very useful function, because it is a Trait method that is implemented for all std collections like `Vec`, `String`, `HashMap` etc.
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@dragnucs Oh yes, it is a very useful function, because it is a Trait method that is implemented for all std collections like `Vec`, `String`, `HashMap` etc.