To target characters that are not part of the printable basic ASCII range, you can use this simple regex: [^ -~]+ Explanation: in the first 128 characters of the ASCII table, the printable range starts with the space character and ends with a tilde. These are the characters you want to keep. That range is … Read more
I think I figured it out. I learned from here that each arrow key is represented by a unique ANSI escape code. Then I learned that the ANSI escape codes vary by system and application: in my terminal, hitting cat and pressing the up-arrow gives ^[[A, in C it seems to be \033[A, etc. The … Read more
Lammert Bies explains both their usage and the history behind. 28 – FS – File separator The file separator FS is an interesting control code, as it gives us insight in the way that computer technology was organized in the sixties. We are now used to random access media like RAM and magnetic disks, but … Read more
Carriage return means to return to the beginning of the current line without advancing downward. The name comes from a printer’s carriage, as monitors were rare when the name was coined. This is commonly escaped as “\r”, abbreviated CR, and has ASCII value 13 or 0xD. Linefeed means to advance downward to the next line; … Read more