json type \ dest type	bool	int	uint	float	string
number	positive => true negative => true zero => false	23.2 => 23 -32.1 => -32	12.1 => 12 -12.1 => 0	as normal	same as origin
string	empty string => false string “0” => false other strings => true	“123.32” => 123 “-123.4” => -123 “123.23xxxw” => 123 “abcde12” => 0 “-32.1” => -32	13.2 => 13 -1.1 => 0	12.1 => 12.1 -12.3 => -12.3 12.4xxa => 12.4 +1.1e2 =>110	same as origin
bool	true => true false => false	true => 1 false => 0	true => 1 false => 0	true => 1 false => 0	true => “true” false => “false”
object	true	0	0	0	originnal json
array	empty array => false nonempty array => true	[] => 0 [1,2] => 1	[] => 0 [1,2] => 1	[] => 0 [1,2] => 1	original json