func (v Value) Len() int {
	x, ok := v.data.(array)
	if !ok {
		return 0
	}
	return len(x)
}
func (v Value) Len() int {
	x, ok := v.data.(array)
	if !ok {
		return 0
	}
	return len(x)
}
func ( v Value ) Len ( ) int { x , ok := v . data . ( array ) if ! ok { return 0 } return len ( x ) }
// Len returns the length of the array v.
// If v.Kind() != Array, Len returns 0.
Len returns the length of the array v . If v . Kind () ! = Array Len returns 0 .