如何在 Golang 中将字符串切片转换为浮点数切片

Question

我试图将字符串切片转换为浮点数，但结果不是切片。有没有办法将字符串切片中的元素转换为 float64 以返回 float64 切片？

func main() {

a := []string{"20.02", "30.01"}

fmt.Println("This is a single slice of string:", a)

for i, element := range a {
    element, _ := strconv.ParseFloat(element, 64)
    //This result converts each element to float64 but no longer holds them in a slice.
    fmt.Printf("%v, %v\n", i, element)
}

}

去游乐场：https://go.dev/play/p/LkNzgvDJw7u

Answer 1

创建一个切片float64并将每个元素附加到其中。

package main

import (
    "fmt"
    "strconv"
)

func main() {

    a := []string{"20.02", "30.01"}

    fmt.Println("This is a single slice of string:", a)

    // Creates a float64 slice with length 0 and capacity len(a)
    b := make([]float64, 0, len(a))

    for _, element := range a {
        element, _ := strconv.ParseFloat(element, 64)
        b = append(b, element)
    }

    fmt.Println(b)
}