Kas saaksite selgitada, mida tähendab 'muutuja püüdmine' programmeerimise kontekstis?

In programming, the term «variable capture» means that a function or closure retains access to variables from the outer scope, even after that scope has finished executing.

For example, in Go, you can create a function that returns another function that uses a variable from the outer function:

func makeAdder(x int) func(int) int {
    return func(y int) int {
        return x + y // 'x' is captured by the closure
    }
}

func main() {
    addFive := makeAdder(5)
    fmt.Println(addFive(3)) // Prints 8
}

Here, the inner function «captures» the variable x from the outer function makeAdder. This allows maintaining state between calls and creating more flexible structures.