如何在Golang中将字符串切片转换为浮点数切片 [英] How to convert slice of string to slice of float in Golang

问题描述

我试图将一段字符串转换为浮点数，但结果不是一段。有没有办法将字符串片段中的元素转换为浮点64以返回浮点64片段？

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
", i, element)
}

}

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

推荐答案

创建float64的切片并向其追加每个元素。

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)
}

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