CODEWITHSUNDEEP
go
digiadit
digiadit

Reputation: 157

Weighted Random in Golang

I have to do weighted Random in Golang but I'm getting an error:

multiple-value randutil.WeightedChoice() in single-value context

Code:

package main

import "fmt"
import "github.com/jmcvetta/randutil"

func main() {    
    choices := make([]randutil.Choice, 0, 2)    
    choices = append(choices, randutil.Choice{1, "dg"})
    choices = append(choices, randutil.Choice{2, "n"})    
    result := randutil.WeightedChoice(choices)    
    fmt.Println(choices)
}

Any help will be deeply appreciated.

Upvotes: 0

Views: 4926

Answers (2)

user6169399
user6169399

Reputation:

The func WeightedChoice(choices []Choice) (Choice, error)
returns Choice, error, so use result, err := randutil.WeightedChoice(choices), like this working code:

package main

import (
    "fmt"

    "github.com/jmcvetta/randutil"
)

func main() {
    choices := make([]randutil.Choice, 0, 2)
    choices = append(choices, randutil.Choice{1, "dg"})
    choices = append(choices, randutil.Choice{2, "n"})
    fmt.Println(choices) // [{1 dg} {2 n}]

    result, err := randutil.WeightedChoice(choices)
    if err != nil {
        panic(err)
    }

    fmt.Println(result) //{2 n}
}

output:

[{1 dg} {2 n}]
{2 n}

Upvotes: 7

Ammar Bandukwala
Ammar Bandukwala

Reputation: 1580

WeightedChoice returns an error you aren't acknowledging in your code.

Upvotes: 0

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