How to verify whether the input is full-width characters in golang

In golang, verifying whether the input is a full-width character requires the use of Unicode encoding and rune type. Unicode encoding is a character encoding standard that assigns a unique numeric code point to each character in the character set, which includes full-width characters and half-width characters. The rune type is the type used to represent Unicode characters in golang.

The first step is to convert the input into a slice of rune type. This can be converted by using golang's []rune type, for example:

input := "这是一段全角字符的输入"
runes := []rune(input)

The runes here convert each character into a slice of rune type.

The second step is to verify whether each character is a full-width character. Full-width characters are generally represented by two bytes in Unicode encoding, so to determine whether a character is a full-width character, you only need to determine whether the number of bytes is equal to 2. This can be used to get the number of bytes occupied by rune type characters through golang's len function.

for _, r := range runes {
    if len(string(r)) == 1 { // 半角字符
        // 处理半角字符
    } else if len(string(r)) == 2 { // 全角字符
        // 处理全角字符
    } else {
        // 非法字符
    }
}

The for loop here traverses the rune type slice, and then uses the len function to determine the number of bytes occupied by each character. If it is 2, it is a full-width character, otherwise it is a half-width character or an illegal character.

Finally, you can handle full-width characters and half-width characters as needed.

for _, r := range runes {
    if len(string(r)) == 1 {
        // 处理半角字符
    } else if len(string(r)) == 2 {
        // 处理全角字符
        fmt.Printf("%c 是全角字符
", r)
    } else {
        // 非法字符
        fmt.Println("存在非法字符")
    }
}

To summarize, in golang, verifying whether the input is a full-width character requires converting the input into a rune type slice, and then determining whether the word is a full-width character by judging the number of bytes occupied by each character. Finally, based on Need to handle full-width characters and half-width characters.

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