How to Efficiently Convert a Go []int8 Slice to a String?

Converting []int8 to String

Problem:

How to efficiently convert a slice of int8 ([]int8) to a string? The standard string(byteslice) conversion for []byte fails for []int8 with the error "cannot convert to type string."

Solution:

Since []int8 and []byte have different types, direct conversion is not possible. Thus, manual conversion is required.

The conversion process involves three steps:

1. Convert int8 to byte: Cast each int8 value to a byte using the byte(v) conversion.
2. Create a byte slice: Allocate a []byte slice with the same length as the input slice.
3. Copy values to byte slice: Assign the converted bytes to the byte slice using indexing ([]).

Code Implementation:

The following Go code demonstrates the conversion:

func B2S(bs []int8) string {
    b := make([]byte, len(bs))
    for i, v := range bs {
        b[i] = byte(v)
    }
    return string(b)
}

This code ensures that int8 values are correctly converted to bytes, resulting in an accurate string representation.

Note:

Although the problem statement initially mentioned []int8, the asker later corrected it to []uint8. For []uint8, direct conversion to string using string(ba) is possible because byte is an alias for uint8.

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