So, what would be the appropriate use-cases for this; I.E, using a map
index expression as the value?
On Thursday, July 7, 2016 at 10:05:42 AM UTC-4, Kyle Stanly wrote:
>
> I noticed that the specification states:
>
> "As with an assignment, if present the operands on the left must be
> addressable or map index expressions; they denote the iteration
> variables."
>
>
> Here is the thing I am having trouble imagining... if the iterator keeps a
> snapshot of the map at the time the iterator was created, would the map
> index expression obtain the actual, up-to-date value for the given key?
> Maybe even determine if it was deleted?
>
> I.E...
>
> for k, m[k] := range m {...}
>
> Apparently is valid Go syntax, however what are the semantics behind this?
> If another Goroutine calls delete(...) and removes that element from the
> map, would this pretty much restore that value back into the map (from what
> is held in the snapshot)? How would you go about retrieving that value
> again? Do you need to re-enter the map to obtain the value again through
> that key, 'k'? What are the practical applications for this?
>
>
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