golang byte conversion character

Go language (Golang) is a modern programming language that attracts more and more developers with its efficient, powerful and easy-to-use features. In Golang, the byte type is used to represent the smallest unit of data. In some cases, it is necessary to convert the byte type into a character type. This article will explore how to convert byte into characters in Golang.

In Golang, a character can be represented by a rune type variable. The rune type is actually an alias of an int32 integer. When converting byte type to character type, it needs to be done with the help of rune type variables. The specific methods are as follows.

1. Use the rune() function to convert the byte type into the character type

Golang provides the rune() function, which can convert a byte type data into the corresponding character type. And returns a rune type data. The following is a sample code that demonstrates how to use the rune() function to convert the byte type to a character type:

package main

import (
    "fmt"
)

func main() {
    var b byte = 'a'
    c := rune(b)
    fmt.Printf("byte类型的字母：%c
", b)
    fmt.Printf("对应的字符类型：%c
", c)
}

The output result is:

byte类型的字母：a
对应的字符类型：a

In the above code, we first define Take a byte type variable 'b' and assign it to 'a', then use the rune() function to convert it to character type, and save the result to variable 'c'. Finally, the original byte type data and the converted character type data are output through the Printf function. It should be noted that when outputting results, the %c placeholder is used to represent character type data.

2. Use the strconv function library to convert the byte array into a string type

In addition to using the rune() function, you can also use the strconv function in the Golang standard library to convert the byte array into String type. The specific operation steps are as follows:

(1) Reference the strconv function library:

import "strconv"

(2) Convert the byte array to a string type:

s := string(byteSlice)

Among them, byteSlice represents the A slice of converted byte type data.

The sample code is as follows:

package main

import (
    "fmt"
    "strconv"
)

func main() {
    bytes := []byte{'a', 'b', 'c', 'd'}
    str := string(bytes)
    fmt.Printf("byte数组：%v
", bytes)
    fmt.Printf("对应的字符串：%s
", str)

    bytestr := []byte(str)
    for _, b := range bytestr {
        fmt.Printf("%c ", b)
    }
}

The output result is:

byte数组：[97 98 99 100]
对应的字符串：abcd
a b c d

In the above code, we first define a byte type array 'bytes' and pass it through The string() function converts to string type and saves the result in the variable 'str'. The 'str' variable contains all elements in the 'bytes' array. Next, it demonstrates how to convert the string type to byte type data by converting the string type data into a byte array and outputting its element values ​​through traversal.

Summary:

This article introduces how to convert byte characters in Golang. In Golang, a character can be represented by a rune type variable. You can use the rune() function to convert byte type data to the corresponding character type, or use the strconv function library to convert the byte array to string type, and convert the string type to byte type data through traversal. These methods are very simple, efficient and easy to use, and can help developers better handle data type conversion.

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