golang string to byte

Converting between golang's string (string) and byte slice (byte slice) is a common operation. In some special scenarios, we need to convert strings into byte slices or vice versa to facilitate various operations. Let's take a look at the conversion method between string and byte slice in golang.

1. Convert string to byte slice

In golang, the bottom layer of string is implemented through byte slice, so it is very easy to convert string to byte slice. We only need to use the built-in conversion function []byte(str), for example:

str := "hello world"
byteSlice := []byte(str)

[string->byteslice.png]

In the above code, we define a string "hello world" and convert it to a byte slice byteSlice using the built-in function []byte() on the second line. It should be noted here that the converted byte slice can be modified, for example:

byteSlice[0] = 'H'
fmt.Println(string(byteSlice))

In the above code, we modify the first element of byteSlice to the capital letter 'H' and use it in the next line The built-in function string() converts it back into a string and outputs it.

2. Convert byte slice to string

Similarly, converting byte slice into string is also very simple, we only need to use the built-in conversion function string(byteSlice) For example:

byteSlice := []byte{'h','e','l','l','o',' ','w','o','r','l','d'}
str := string(byteSlice)

[byteslice->string.png]

In the above code, we define a byte slice byteSlice and use the built-in function string() on the second line to It is converted into a string str. It should be noted that when byteSlice contains Chinese characters, we need to convert it into string type to correctly output Chinese characters. Otherwise, garbled characters will appear.

To summarize, in golang we can convert strings into byte slices through the built-in []byte() function, and we can also convert byte slices into strings through the built-in string() function. These conversion operations are very simple and can be easily used in various scenarios.

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