如何在Golang中删除字符串周围的引号

I have a string in Golang that is surrounded by quote marks. My goal is to remove all quote marks on the sides, but to ignore all quote marks in the interior of the string. How should I go about doing this? My instinct tells me to use a RemoveAt function like in C#, but I don't see anything like that in Go.

For instance:

"hello""world"

should be converted to:

hello""world

For further clarification, this:

"""hello"""

would become this:

""hello""

because the outer ones should be removed ONLY.

Use a slice expression:

s = s[1 : len(s)-1]

If there's a possibility that the quotes are not present, then use this:

if len(s) > 0 && s[0] == '"' {
    s = s[1:]
}
if len(s) > 0 && s[len(s)-1] == '"' {
    s = s[:len(s)-1]
}

playground example

You can take advantage of slices to remove the first and last element of the slice.

package main

import "fmt"

func main() {
    str := `"hello""world"`

    if str[0] == '"' {
        str = str[1:]
    }
    if i := len(str)-1; str[i] == '"' {
        str = str[:i]
    }

    fmt.Println( str )
}

Since a slice shares the underlying memory, this does not copy the string. It just changes the str slice to start one character over, and end one character sooner.

This is how the various bytes.Trim functions work.

Use slice expressions. You should write robust code that provides correct output for imperfect input. For example,

package main

import "fmt"

func trimQuotes(s string) string {
    if len(s) >= 2 {
        if s[0] == '"' && s[len(s)-1] == '"' {
            return s[1 : len(s)-1]
        }
    }
    return s
}

func main() {
    tests := []string{
        `"hello""world"`,
        `"""hello"""`,
        `"`,
        `""`,
        `"""`,
        `goodbye"`,
        `"goodbye"`,
        `goodbye"`,
        `good"bye`,
    }

    for _, test := range tests {
        fmt.Printf("`%s` -> `%s`
", test, trimQuotes(test))
    }
}

Output:

`"hello""world"` -> `hello""world`
`"""hello"""` -> `""hello""`
`"` -> `"`
`""` -> ``
`"""` -> `"`
`goodbye"` -> `goodbye"`
`"goodbye"` -> `goodbye`
`goodbye"` -> `goodbye"`
`good"bye` -> `good"bye`