Feature vectorization using hashing trick in golang

hashify.go

func hashify(appList []string, vectorLength int64) ([]int){
	hashedList := make([]int, vectorLength)
	for _, app := range appList {
		hashedValue := sha256.New()
		hashedValue.Write([]byte(app))
		hexStr := fmt.Sprintf("%x", hashedValue.Sum(nil))
		
		hexInt := new(big.Int)
		hexInt, ok := hexInt.SetString(hexStr, 16)
		if !ok {
			fmt.Println("error")
			panic("couldn't create bigint")
		}
		bigVectorLength := big.NewInt(vectorLength)
		modulo := new(big.Int)
		modulo = modulo.Mod(hexInt, bigVectorLength)
		moduloInt64 := modulo.Int64()
		hashedList[moduloInt64] += 1
	}
	return hashedList
}