polars-core 0.53.0

Core of the Polars DataFrame library
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35

use super::*;

#[derive(Default)]
pub struct IdHasher {
    hash: u64,
}

impl Hasher for IdHasher {
    fn finish(&self) -> u64 {
        self.hash
    }

    fn write(&mut self, _bytes: &[u8]) {
        unreachable!("IdHasher should only be used for integer keys <= 64 bit precision")
    }

    fn write_u32(&mut self, i: u32) {
        self.hash = i as u64;
    }

    #[inline]
    fn write_u64(&mut self, i: u64) {
        self.hash = i;
    }

    fn write_i32(&mut self, i: i32) {
        self.hash = i as u64;
    }

    fn write_i64(&mut self, i: i64) {
        self.hash = i as u64;
    }
}

pub type IdBuildHasher = BuildHasherDefault<IdHasher>;