Implementing common hash algorithms using Go language

package main

import (
	"crypto"
	"crypto/md5"
	"crypto/sha1"
	"crypto/sha256"
	"crypto/sha512"
	"encoding/hex"
	"fmt"
	"hash"

	"/x/crypto/md4"
	"/x/crypto/ripemd160"
)

func main() {
	str1 := HashByType("Hello World", "md4", false)
	(str1)
	str2 := HashByCrypto("Hello World", crypto.MD4, false)
	(str2)
}

// Hash according to different hash types: md4, md5, sha1, ripemd160, sha256, sha512func HashByType(text string, hashType string, isHex bool) string {
	var hashInstance  // Define hash instance	switch hashType {          // Select the hash type	case "md4":
		hashInstance = () // "/x/crypto/md4"
	case "md5":
		hashInstance = ()
	case "sha1":
		hashInstance = ()
	case "ripemd160":
		hashInstance = () // "/x/crypto/ripemd160"
	case "sha256":
		hashInstance = ()
	case "sha512":
		hashInstance = ()
	}
	if isHex {
		arr, _ := (text) // Convert hexadecimal string to hexadecimal byte array		(arr)          // Write to hash instance object	} else {
		([]byte(text)) // Convert string to byte array and write to hash object	}
	bytes := (nil)  // Append the hash value to the parameter, only get the original value, no need to append it, use nil, return the hash value byte array	return ("%x", bytes) // Format output hash value}

// Hash according to different hash types: md4, md5, sha1, ripemd160, sha256, sha512func HashByCrypto(text string, myhash , isHex bool) string {
	hashInstance := () // Define hash instance	if isHex {
		arr, _ := (text) // Convert hexadecimal string to hexadecimal byte array		(arr)          // Write to hash instance object	} else {
		([]byte(text)) // Convert string to byte array and write to hash object	}
	bytes := (nil)  // Append the hash value to the parameter, only get the original value, no need to append it, use nil, return the hash value byte array	return ("%x", bytes) // Format output hash value}

const (
	MD4         Hash = 1 + iota // import /x/crypto/md4
	MD5                         // import crypto/md5
	SHA1                        // import crypto/sha1
	SHA224                      // import crypto/sha256
	SHA256                      // import crypto/sha256
	SHA384                      // import crypto/sha512
	SHA512                      // import crypto/sha512
	MD5SHA1                     // no implementation; MD5+SHA1 used for TLS RSA
	RIPEMD160                   // import /x/crypto/ripemd160
	SHA3_224                    // import /x/crypto/sha3
	SHA3_256                    // import /x/crypto/sha3
	SHA3_384                    // import /x/crypto/sha3
	SHA3_512                    // import /x/crypto/sha3
	SHA512_224                  // import crypto/sha512
	SHA512_256                  // import crypto/sha512
	BLAKE2s_256                 // import /x/crypto/blake2s
	BLAKE2b_256                 // import /x/crypto/blake2b
	BLAKE2b_384                 // import /x/crypto/blake2b
	BLAKE2b_512                 // import /x/crypto/blake2b
	maxHash
)

() // Reset the hash instance

package main

import (
	"crypto"
	"crypto/md5"
	"crypto/sha1"
	"crypto/sha256"
	"crypto/sha512"
	"encoding/hex"
	"fmt"
	"hash"

	"/x/crypto/md4"
	"/x/crypto/ripemd160"
)

func main() {
	str1 := HashByType("Hello World", "md4", false)
	(str1)
	str2 := HashByCrypto("Hello World", crypto.MD4, false)
	(str2)
	str3 := DoubleHashByCrypto("Hello World", crypto.MD4, false)
	(str3)
}

// Hash according to different hash types: md4, md5, sha1, ripemd160, sha256, sha512func HashByType(text string, hashType string, isHex bool) string {
	var hashInstance  // Define hash instance	switch hashType {          // Select the hash type	case "md4":
		hashInstance = () // "/x/crypto/md4"
	case "md5":
		hashInstance = ()
	case "sha1":
		hashInstance = ()
	case "ripemd160":
		hashInstance = () // "/x/crypto/ripemd160"
	case "sha256":
		hashInstance = ()
	case "sha512":
		hashInstance = ()
	}
	if isHex {
		arr, _ := (text) // Convert hexadecimal string to hexadecimal byte array		(arr)          // Write to hash instance object	} else {
		([]byte(text)) // Convert string to byte array and write to hash object	}
	bytes := (nil)  // Append the hash value to the parameter, only get the original value, no need to append it, use nil, return the hash value byte array	return ("%x", bytes) // Format output hash value}

// Hash according to different hash types: md4, md5, sha1, ripemd160, sha256, sha512func HashByCrypto(text string, myhash , isHex bool) string {
	hashInstance := () // Define hash instance	if isHex {
		arr, _ := (text) // Convert hexadecimal string to hexadecimal byte array		(arr)          // Write to hash instance object	} else {
		([]byte(text)) // Convert string to byte array and write to hash object	}
	bytes := (nil)  // Append the hash value to the parameter, only get the original value, no need to append it, use nil, return the hash value byte array	return ("%x", bytes) // Format output hash value}

// Hash according to different hash types: md4, md5, sha1, ripemd160, sha256, sha512// The byte array after hashing 256 twice, the second time is to hash the hexadecimal after the first hashfunc DoubleHashByCrypto(text string, myhash , isHex bool) string {
	hashInstance := () // Define hash instance	if isHex {
		arr, _ := (text) // Convert hexadecimal string to hexadecimal byte array		(arr)          // Write to hash instance object	} else {
		([]byte(text)) // Convert string to byte array and write to hash object	}
	bytes := (nil) // Append the hash value to the parameter, only get the original value, no need to append it, use nil, return the hash value byte array	()
	(bytes)
	bytes = (nil)
	return ("%x", bytes) // Format output hash value}