hi, 

i had a minor bug where the last expression in a 
let _ = ...
block of my module was not fully applied and hence was returning a 
functional value rather than apply the function (because I had added a 
parameter to the function).

pretty harmless, but it led me to wonder why I wasn't writing 'let () = 
..' for all my module initialization blocks, which would have given me 
'warning should have type unit' in the above situation.

So is there a reason why the commonly used idiom seems to be 'let _ =' 
rather than 'let () = '? 

Thanks

Henri


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