Function Before

function/function.go:31–45

Before creates a function that invokes func once it's called less than n times. Play: https://go.dev/play/p/0HqUDIFZ3IL

(n int, fn any)

// Before creates a function that invokes func once it's called less than n times.
// Play: https://go.dev/play/p/0HqUDIFZ3IL
func Before(n int, fn any) func(args ...any) []reflect.Value {
	// Catch programming error while constructing the closure
	mustBeFunction(fn)
	var result []reflect.Value
	return func(args ...any) []reflect.Value {
		if n > 0 {
			result = unsafeInvokeFunc(fn, args...)
		}
		if n <= 0 {
			fn = nil
		}
		n--
		return result
	}
}

// CurryFn is for make curry function
type CurryFn[T any] func(...T) T