use std::hash::{Hash, Hasher};
use std::{collections::hash_map::DefaultHasher, io::Write};
pub fn write_cursor_and_flush() {
print!("> ");
let _ = std::io::stdout().flush();
}
pub fn calculate_hash<T: Hash>(t: &T) -> u64 {
let mut s = DefaultHasher::new();
t.hash(&mut s);
s.finish()
}