How to Efficiently Convert a Byte Slice to a Float64 in GoLang?

Converting Byte Slice to Float64 in GoLang

Efficiently converting a []uint8 byte slice into a float64 is an essential task in various computing scenarios. GoLang provides methods to facilitate this conversion seamlessly.

One approach is to leverage the binary package. It offers functions such as binary.LittleEndian.Uint64() to extract the 64-bit unsigned integer representation from the byte slice. Once obtained, the math.Float64frombits() function converts this integer directly to a float64.

Alternatively, you can convert the byte slice to a string and then to a float64 using strconv.ParseFloat(). However, this method can potentially lead to inaccuracies due to string conversion and parsing.

Below is an example demonstrating the straightforward method using the binary package:

package main

import (
    "encoding/binary"
    "fmt"
    "math"
)

func Float64frombytes(bytes []byte) float64 {
    bits := binary.LittleEndian.Uint64(bytes)
    float := math.Float64frombits(bits)
    return float
}

func main() {
    bytes := []uint8{24, 45, 68, 84, 251, 33, 9, 64}
    float := Float64frombytes(bytes)
    fmt.Println(float) // Output: 3.141592653589793
}

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