How to Marshal / Unmarshal Json with a Custom Type Attribute in Go
In Golang, using the Unmarshal JSON function is the easiest way to Marshal / Unmarshal json with a custom type attribute.
JSON (JavaScript Object Notation) is a lightweight data-interchange format.
Using UnmarshalJSON Function
Example on custom Unm...
How to Encrypt and Decrypt a String Using AES CBC in Go
In Golang, using the crypto/aes package is the easiest way to encrypt a string using AES CBC.
Ehrsam, Meyer, Smith and Tuchman invented the cipher block chaining (CBC) mode of operation in 1976. In CBC mode, each block of plaintext is XORed with the ...
How to Encrypt and Decrypt a String Using AES GCM 256 in Go
In Golang, using the crypto/aes package is the easiest way to encrypt a string using AES GCM 256.
In cryptography, Galois/Counter Mode (GCM) is a mode of operation for symmetric-key cryptographic block ciphers which is widely adopted for its performa...
How to Generate a SHA256 HMAC Hash from a String in Go
In Golang, using the crypto/hmac library is the easiest way to generate a SHA256 HMAC Hash from a string.
In cryptography, an HMAC (hash-based message authentication code) is a specific type of message authentication code (MAC) involving a cryptograp...
How to Get a SHA256 Hash from a String in Go
In Golang, using the Sum256 function is the easiest way to get a SHA256 hash from a string.Go implements several hash functions in various crypto/* packages.
Using Sum256 Function
The sha256.Sum256() function returns the SHA256 checksum of the data...
How to Get a MD5 Hash from a String in Go
In Golang, using the Sum function is the easiest way to get a MD5 hash from a string.
Using Sum Function
The md5.Sum() function returns the MD5 checksum of the data.
The following example should cover whatever you are trying to do:
package mai...
How to Remove Invalid UTF-8 Characters from a String in Go
In Golang, there are 3 ways to remove invalid UTF-8 characters from a string.
Using ToValidUTF8 Function
The strings.ToValidUTF8() function returns a copy of the string s with each run of invalid UTF-8 byte sequences replaced by the replacement str...
How to Count Characters in a String in Go
In Golang, there are 2 ways to count characters in a string.
Using RuneCountInString Function
Straight forward natively use the utf8.RuneCountInString()
The following example should cover whatever you are trying to do:
package main
import (
...
How to Clear a bytes.Buffer in Go
In Golang, using the buffer.Reset function is the easiest way to clear a bytes.Buffer
Using buffer.Reset Function
The buffer.Reset() function resets the buffer to be empty, but it retains the underlying storage for use by future writes. Reset is the...
How to Print the Memory Address of a Slice in Go
In Golang, using the %p verbs is the easiest way to print the memory address of a slice.
Using fmt.Printf Function
Pointer:
%p base 16 notation, with leading 0x. The %b, %d, %o, %x and %X verbs also work with pointers,
formatting the value exactly ...
How to Get Memory Size of the Variable in Go
In Golang, using the unsafe.Sizeof function is the easiest way to get memory size of the variable
Using Sizeof Function
You can use the unsafe.Sizeof function for this. It returns the size in bytes.
See the following example:
package main
impo...
How to Convert a Bool to a String in Go
In Golang, there are 2 ways to convert a bool to a string.
Using strconv.FormatBool Function
The strconv.FormatBool() function returns "true" or "false" according to the value of b. For example,
package main
import (
"fmt"
"strconv"
)
fun...
How to Convert an Integer to a Float Number in Go
In Golang, using the float64 function is the easiest way to convert an integer to a float number.
Using float64 Function
The easiest way to convert an integer to a float number in Golang:
package main
import "fmt"
func main() {
i := 6
f ...
How to Generate a UUID in Go
In Golang, there are 4 ways to generate a uuid.
Using uuid Package
install
Use the following command to download the repository to the local file system.
install
go mod tidy
go get github.com/google/uuid
go install github.com...
How to Trim Leading and Trailing White Spaces of a String in Go
In Golang, there are 3 ways to trim leading and trailing white spaces of a string.
Using strings.TrimSpace Function
The easiest way to trim leading and trailing white spaces of a string in Golang. For example,
package main
import (
"fmt"
"...