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...

Variadic Functions Tutorial with Examples in Go. Variadic Function A variadic function is one that can be called with varying numbers of arguments. The most familiar examples are fmt.Printf and its variants. package main import "fmt" func add(v...

Closures and Anonymous Functions in Go. Anonymous Function A function literal is written like a function declaration, but without a name following the func keyword. It is an expression, and its value is called an anonymous function. package main ...

Testing the equivalence of maps in Go. reflect.DeepEqual Function It first checks if both maps are nil, then it checks if they have the same length before finally checking to see if they have the same set of (key, value) pairs. package main impo...

Golang path and filepath Examples. Using filepath.Base The number is the index of the last slash in the string. If you want to get the file's base name, use filepath.Base: package main import ( "fmt" "path/filepath" ) func main() { path ...

Calculate degrees celcius from farenheit in Go. Following program shows you how to convert fahrenheit to celsius. The function FToC below encapsu- lates the temperature conversion logic so that it is defined only once but may be used from multiple p...

In Rust, there are 2 ways to sort a vector. Using sort Method The sort(&mut self) method sorts the slice. This sort is stable (i.e., does not reorder equal elements) and O(n * log(n)) worst-case. For example, fn main() { let mut v = [3, -5, ...

In Golang, there are 2 ways to check if a slice contains an element. Using contains Function The following example should cover whatever you are trying to do: package main import "fmt" func Contains[E comparable](s []E, v E) bool { for _, ...

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, there are 2 ways to check string is in json format. Using Unmarshal Function The following example should cover whatever you are trying to do: package main import ( "encoding/json" "fmt" ) func isJson(s string) bool { var js ...

In Golang, there are 2 ways to duplicate slices. Using append Function You could write one simple statement to make a shallow copy of a slice. The following example should cover whatever you are trying to do: package main import "fmt" type T...

In Python, there are 2 ways to make a list of alphabet characters. Using string Module The string.ascii_lowercase is a pre-initialized string used as string constant. In Python, string ascii_lowercase will give the lowercase letters ‘abcdefghijklmno...

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...