Brace notation

In several Programming languages, Brace Notation is a faster way to extract bytes from a string variable.

Typically, rather than writing:

 a_byte=MID(a_string,82,1) 

, one can write:

 a_byte=a_string{82} 

However this notation, while being much faster, is also more dangerous because it does not perform any checks on string length, and therefore its return cannot be accurately predicted.