删除Golang中的双引号或单引号

Question

Shouldn't strconv.Unquote handle both single and double quotes?

See also https://golang.org/src/strconv/quote.go - line 350

However following code returns a syntax error:

s, err := strconv.Unquote(`'test'`)
if err != nil {
  fmt.Println(err)
} else {
  fmt.Println(s)
}

https://play.golang.org/p/TnprqhNdwD1

But double quotes work as expected:

s, err := strconv.Unquote(`"test"`)
if err != nil {
  fmt.Println(err)
} else {
  fmt.Println(s)
}

What am I missing?

Answer 1

There is no ready function for what you want in the standard library.

What you presented works, but we can make it simpler (and likely more efficient):

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

Testing it:

fmt.Println(trimQuotes(`'test'`))
fmt.Println(trimQuotes(`"test"`))
fmt.Println(trimQuotes(`"'test`))

Output (try it on the Go Playground):

test
test
"'test