Golang bytes.Buffer Examples Examples of Golang bytes.Buffer The bytes package provides the Buffer type for efficient manipulation of byte slices. A Buffer starts out empty but grows as data of types like string, byte, and []byte are written to it. ...

Introduction to Strings in Go.What is a String? A string is an immutable sequence of bytes. Strings may contain arbitrary data, including bytes with value 0, but usually they contain human-readable text. Make a main.go file containing the following...

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 ...

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...

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...

In Rust, there are 2 ways to check if a string contains whitespace. Using char::is_whitespace char::is_whitespace returns true if the character has the Unicode White_Space property. You can pass char::is_whitespace to .contains(): fn main() { ...

In Golang, there are 2 ways to check if a file is a valid image. Using DetectContentType Function The http.DetectContentType() function implements the algorithm described at https://mimesniff.spec.whatwg.org/ to determine the Content-Type of the gi...

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...

In Python, using the str.join function is the easiest way to concatenate a list of strings into a single string Using str.join Function The str.join() method returns a string which is the concatenation of the strings in iterable. A TypeError will be...

In Python, there are 3 ways to get the size of a file. Using os.path.getsize Method The os.path.getsize() method returns the size, in bytes, of path. Raise OSError if the file does not exist or is inaccessible. For example, #!/usr/bin/python3 #...

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...

In Golang, there are 2 ways to pipe several commands. Using piped commands For example, this function retrieves the CPU model name using piped commands: package main import ( "fmt" "os/exec" ) func main() { cmd := "cat /proc/cpuinfo | eg...

In Golang, using the exec.Command() function is the easiest way to execute a shell command Using exec.Command Function Command returns the Cmd struct to execute the named program with the given arguments. You can execute a shell command using the e...

In Golang, there are 2 ways to get file length. Using file.Stat Function Open opens the named file for reading. If successful, methods on the returned file can be used for reading; the associated file descriptor has mode O_RDONLY. See the followin...

In Golang, using the len function is the easiest way to count the items in the map structure. Using len Function The built-in function len take arguments of various types and return a result of type int. The implementation guarantees that the result...