for-range over a string will get the runes (Unicode code points) in the string. Then how to get the byte elements in a string? There are two ways to achieve this. The performance of these two ways is substantially equivalent.
for;; loop
for i := 0; i < len(aString); i++ {
byteElement := aString[i]
... // use byteElement
}
for-range loop
[]byte(aString) if the result byte slice (of the conversion) is proven not to be used concurrently. For example, the conversion following the range keyword doesn't allocate and duplicate the underlying bytes.
for _, byteElement := range []byte(aString) {
... // use byteElement
}
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