Several Ways to Stop Goroutine in Go. A signal channel Typically, you pass the goroutine a (possibly separate) signal channel. That signal channel is used to push a value into when you want the goroutine to stop. The goroutine polls that channel reg...

Defer, Panic, and Recover in Go. panic During a typical panic, normal execution stops, all deferred function calls in that goroutine are executed, and the program crashes with a log message. package main func main() { panic("invalid") } ...

Understanding defer in Go. Deferred Function Calls A defer statement is an ordinary function or method call prefixed by the keyword defer. The function and argument expressions are evaluated when the statement is executed, but the actual call is def...

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 sort.Slice function is the easiest way to sort a slice Using Slice Function You simply pass an anonymous function to the sort.Slice function： package main import ( "fmt" "sort" ) func main() { s := []string{"Houston...

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 IsPrivate function is the easiest way to check if IP address is in private network space. Using IsPrivate Function The IsPrivate() function reports whether ip is a private address, according to RFC 1918 (IPv4 addresses) and RFC...

In Golang, there are 2 ways to change the current directory. Using Dir Property Usually if you need a command to run from a specific directory, you can specify that as the Dir property on the Command, for example: package main import ( "os/...

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 Rust, there are 2 ways to remove an element from a vector. Using retain Function The vec::retain() function retains only the elements specified by the predicate. For example, fn main() { let mut v = vec![1, 3, 2, 3, 4]; v.retain(|&x| x ...

In Rust, using the read_dir function is the easiest way to list files of a directory. Using read_dir Function The fs::read_dir() function returns an iterator over the entries within a directory. See the following example: use std::fs; fn main...

In Golang, there are 2 ways to get the difference in hours between two dates. Using time.Since Function The time.Since() function returns the time elapsed since t. It is shorthand for time.Now().Sub(t). For example, package main import ( "fm...

In Golang, using the os.MkdirAll function is the easiest way to create nested directories Using os.MkdirAll Function The os.MkdirAll() function creates a directory named path, along with any necessary parents, and returns nil, or else returns an er...

In Golang, there are 2 ways to index characters in a string. Using individual characters In UTF-8, ASCII characters are single-byte corresponding to the first 128 Unicode characters. Strings behave like slices of bytes. A rune is an integer value i...

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...