Whats this error

[trim sapphire]

can anyone explain what does this error mean?

[paper fog]

share the full error message

[trim sapphire]

i missed the first part

my bad

func (v voters) record_preferences() error {
    _, voted := global_ranking[v.name]
    if voted {
        return errors.New("Voter voted")
    }
    // fmt.Println(v.votes)
    fmt.Println(v.votes)
    global_ranking[v.name] = v.votes
    return nil
}

i think its in this part

type global_ranks map[voter_name]voter_ranks
var global_ranking global_ranks

[flint willow]

try this

func (v *voters) record_preferences() error {
    _, voted := global_ranking[v.name]
    if voted {
        return errors.New("Voter voted")
    }
    // fmt.Println(v.votes)
    fmt.Println(v.votes)
    global_ranking[v.name] = v.votes
    return nil
}

[paper fog]

no

[paper fog]

its interesting that receiving from nil map does not cause error.
probably because of the second bool variable _, voted :=
(its not)

[flint willow]

My hunch might have to use something like this
m := make(map[string]interface{})

[trim sapphire]

see the error goes away if i take way the assigment to global rankings

https://medium.com/@KeithAlpichi/go-gotcha-nil-maps-66b851c50475

i found this

i think

its cause of the nil map assignment

[flint willow]

Okay. can you paste the code having changes that fixed the issue. would like to retrospect it.

[paper fog]

var global_ranking = global_ranks{}

[trim sapphire]

the artical covers only var and struct usage

not when assignment a type

[trim sapphire]

yep

this

fixed the panic error

so this initializes the map i assume