This is just how type assertion works.
If you don't use the dual return it panics if the actual type is different
from the one you try to assert.
On Thu, Sep 29, 2016, 05:26 T L <tapir....@gmail.com> wrote:
> package main
>
> func main() {
> var m = map[string]int{}
> _, _ = m["abc"] // ok
> _ = m["abc"] // ok
>
> var i interface{} = 789
> _, _ = i.(bool) // ok
> _ = i.(bool) // panic: interface conversion: interface is int, not bool
> }
>
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