oo many arguments in call to 'strings.Index'
时间: 2024-09-10 09:12:54 浏览: 16
`strings.Index` 是 Go 语言标准库中 `strings` 包的一个函数,用于查找字符串中某个子串的第一次出现的位置。如果子串在主字符串中被找到,则返回第一个匹配字符的索引(从0开始计数),如果没有找到则返回 `-1`。
出现 "too many arguments in call to 'strings.Index'" 的错误通常意味着在调用 `strings.Index` 函数时,传入的参数数量超过了它所要求的两个参数。`strings.Index` 函数的正确用法是传入两个字符串参数,第一个是你要搜索的字符串(主字符串),第二个是你想要查找的子串。
举个例子:
```go
package main
import (
"fmt"
"strings"
)
func main() {
str := "Hello, World!"
subStr := "World"
index := strings.Index(str, subStr)
fmt.Println(index) // 输出子串 "World" 在 "Hello, World!" 中的起始索引,结果为7
}
```
如果你传入了超过两个参数,比如:
```go
index := strings.Index(str, subStr, "额外参数")
```
编译器就会报错,因为 `strings.Index` 不接受三个参数。
相关问题
too many arguments in function call
This error occurs when you pass more arguments to a function than it expects. For example, if you have a function that takes two arguments, and you call it with three arguments, you will get this error.
To fix this error, you need to make sure that you are passing the correct number of arguments to the function. Check the function definition and make sure that you are passing the correct number of arguments in the correct order.
If you are not sure how many arguments a function expects, you can check its documentation or look at its source code. Some programming languages also provide error messages that tell you how many arguments a function expects and how many you have passed.
golang,err := exec.Command("rm", "./output/*").Run() if err != nil { t.Error(err) },提示not enough arguments in call to exec.Command,应如何修改
您需要将命令和参数分别传递给`exec.Command()`函数,例如:
```
err := exec.Command("rm", "./output/*").Run()
if err != nil {
t.Error(err)
}
```
修改后的代码将命令`rm`和参数`./output/*`分别传递给`exec.Command()`函数。