How to Convert Unicode Code Points to Literal Characters in Go?

Converting Unicode Code Points to Literal Characters in Go

Suppose you encounter a text file with unicode code points like the following:

\u0053
\u0075
\u006E

Your goal is to convert these code points into their corresponding literal characters:

S
u
n

You've tried using ioutil.ReadFile("data.txt"), but it outputs the code points rather than the characters.

Solution: Utilizing strconv.Unquote() and strconv.UnquoteChar()

To address your issue, you can employ either strconv.Unquote() or strconv.UnquoteChar(). However, note that strconv.Unquote() requires the input strings to be enclosed in quotes:

lines := []string{
    `\u0053`,
    `\u0075`,
    `\u006E`,
}

for i, v := range lines {
    var err error
    lines[i], err = strconv.Unquote(`"` + v + `"`)
    if err != nil {
        fmt.Println(err)
    }
}

Alternatively, if you want to unquote individual runes or strings without quotes, you can use strconv.UnquoteChar():

runes := []string{
    `\u0053`,
    `\u0075`,
    `\u006E`,
}

for _, v := range runes {
    value, _, _, err := strconv.UnquoteChar(v, 0)
    if err != nil {
        fmt.Println(err)
    }
    fmt.Printf("%c\n", value)
}

These approaches will enable you to convert unicode code points to literal characters in Go, whether they are enclosed in quotes or not.

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