Character - Null Character (NUL)

About

The null character (also known as null terminator) ¹⁾, abbreviated NUL, is a control character with the value zero

Position

It's the first character of most of the character set such as ASCII and unicode

You can get it with the 0 code point.

Example in Javascript:

String.fromCodePoint(o);

Header

The null character may be used to determine an header position in a file.

Ie all previous characters may be part of an header that adds extra metadata information.

For instance ²⁾, git will add:

• the type of object
• a space
• the size in bytes of the content
• and a final null byte.

header = "blob #{content.bytesize}\0"