go - 如何递归地将字符串连接到golang中的字符串类型数组

Question

我为此苦苦挣扎了很长一段时间。我基本上想创建一个函数，以递归方式将字符串连接到数组。

像这样:

join ", " ["one","two","three"] should look like this "one, two, three"

Answer 1

已经有 Join strings 模块中的函数。但它不是递归的，如果你需要递归你可以这样写:

package main

import "fmt"

func join_helper(splitter string, arrOfStrings []string, res string) string {
    if len(arrOfStrings) == 0 {
       return res
    }

    if len(arrOfStrings) == 1 {
       return join_helper(splitter, arrOfStrings[1:], res + arrOfStrings[0])
    }

    return join_helper(splitter, arrOfStrings[1:], res + arrOfStrings[0] + splitter)
}

func join(splitter string, arrOfStrings []string) string {
    return join_helper(splitter, arrOfStrings, "")
}

func main(){
    fmt.Println(join(",", []string{"a", "b", "c", "d"}))
}