alanj853
'_ = some_function_call' necessary?
Hi,
I have come across some elixir repos recently and have noticed “_ = <some_function>” getting used in the code. For example
_ = File.read("some_path")
Is this a convention? I have heard some people say it denotes that we are aware of a return value of a function, but are signifying that we don’t care about it. But I would have thought that just calling the function with no LHS assignment would have been enough for that.
Am I correct in saying this is unnecessary, or is there in fact some meaning to it that I am unaware of.
Thanks!
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LostKobrakai
There’s a dialyzer setting to warn on unused return values and sometimes not handling a return value can be a source for bugs. It might be unnecessary, but still has usefulness beyond the raw functionality of the code.
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marcandre
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