C Programming

Print string of arbitrary size ignoring null characters: printf("%.*s", stringLength, pointerToString);
Reuse socket:

int sockfd;
int option = 1;
sockfd = socket(AF_INET, SOCK_STREAM, 0);
setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &option, sizeof(option));

Formatting

Format all files in-place: clang-format -i *.c *.h
Specify format:
- Predefined style: -style=<STYLE>, e.g. -style=llvm
- Custom file in current or parent directory: -style=file
Create style file based on default: clang-format -style=llvm -dump-config > .clang-format
If no -style is provided, -style=file is used. If there is no .clang-format, -style=LLVM is used
Use default style, but overwrite some key: --style={BasedOnStyle: <STYLE>, <KEY>: <VALUE>}

clang-format --style="{BasedOnStyle: LLVM, IndentWidth: 4, ColumnLimit: 90}" -i *.c *.h