10

http://play.golang.org/p/fJACxhSrXX

構造体の配列をトラバースしたい。

 func GetTotalWeight(data_arr []struct) int {
    total := 0
    for _, elem := range data_arr {
        total += elem.weight
    }
    return total
 }

しかし、構文エラーが発生しています

   syntax error: unexpected ), expecting {

構造体をトラバースすることは可能ですか?

4

2 に答える 2

18

あなたの機能はほぼ完全に正しいです。次のように、TrainData を として定義しtype、型シグネチャGetTotalWeightを[]TrainDataではなく[]structに変更します。

import "fmt"

type TrainData struct {
    sentence string
    sentiment string
    weight int
}

var TrainDataCity = []TrainData {
    {"I love the weather here.", "pos", 1700},
    {"This is an amazing place!", "pos", 2000},
    {"I feel very good about its food and atmosphere.", "pos", 2000},
    {"The location is very accessible.", "pos", 1500},
    {"One of the best cities I've ever been.", "pos", 2000},
    {"Definitely want to visit again.", "pos", 2000},
    {"I do not like this area.", "neg", 500},
    {"I am tired of this city.", "neg", 700},
    {"I can't deal with this town anymore.", "neg", 300},
    {"The weather is terrible.", "neg", 300},
    {"I hate this city.", "neg", 100},
    {"I won't come back!", "neg", 200},
}

func GetTotalWeight(data_arr []TrainData) int {
    total := 0
    for _, elem := range data_arr {
        total += elem.weight
    }
    return total
}

func main() {
    fmt.Println("Hello, playground")
    fmt.Println(GetTotalWeight(TrainDataCity))
}

これを実行すると、次のようになります。

Hello, playground
13300
于 2013-10-18T00:18:50.497 に答える