golang 字符串拼接 字符串数组转字符串

1.字符串拼接

一般对于少量的字符串拼接可以直接用+来连接，不过最好的方法还是Builder。

buffer.Builder

package main

import (
	"fmt"
)

func main() {
	s1 := "哈哈"
	s2 := "嘻嘻"
	var build strings.Builder
	build.WriteString(s1)
	build.WriteString(s2)
	s3 := build.String()
	fmt.Println(s3)
}
输出：
哈哈嘻嘻

2.golang字符串数组声明与初始化

//法一
var words []string 
words = []string{"我","爱","你"}

//法二
words := []string{"我","爱","你"}

3.字符串数组转字符串

strings.Join(elems []string, sep string)

package main

import (
	"fmt"
	"strings"
)

func main() {
	var words []string
	words = []string{"大理", "苏州", "西安"}
	fmt.Println(words)

	res := strings.Join(words, ",")
	fmt.Println(res)
	fmt.Println(reflect.TypeOf(res))
}

输出：
大理,苏州,西安
string