map: Panic on Invalid key

[iacore]

I think that accessing invalid key in map should panic like array. The current behavior returns "default value", which is not consistent with array.

Sometimes, the default value isn't desired:

a := map[int]&int

println(a[1]) // &nil

[YamilBracho]

V returns the default value for the type of result. In this case the default value for a pointer (pointer to int to be more specific) is nil.
You can also use the in operator to check if a key exists in the map. For example println(1 in a)

[Delta456]

You can even use a[1] or { panic('error msg') }