Postgres uses \N as substitute symbol for NULL value. But all psql commands start with a backslash \ symbol. You can get these messages, when a copy statement fails, but the loading of dump continues. This message is a false alarm. You have to search all lines prior to this error if you want to … Read more
Most modern browsers have a console in their developer tools, useful for this sort of debugging. console.log(myvar); Then you will get a nicely mapped out interface of the object/whatever in the console. Check out the console documentation for more details.
Update (2021) – Java 17 now includes java.util.HexFormat (only took 25 years): HexFormat.of().parseHex(s) For older versions of Java: Here’s a solution that I think is better than any posted so far: /* s must be an even-length string. */ public static byte[] hexStringToByteArray(String s) { int len = s.length(); byte[] data = new byte[len / … Read more