On: What is your favorite C programming trick? (2009)

[bertr4nd]

Zero-length arrays, used to implement a variable-sized structure with header: https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html. Although apparently it’s a GCC extension, which I didn’t realize until now.

[kevin_thibedeau → bertr4nd]

C99 made it official with "type foo[];" syntax. Better than using "type foo[1];" and potentially adding unnecessary padding.