Struct bloom_filter_plus::BloomFilter

pub struct BloomFilter { /* fields omitted */ }

BloomFilter

Implementations

impl BloomFilter

pub fn new() -> Self

create bloomfilter

example

test 1
let mut filter = BloomFilter::new();
filter.insert("key");
assert_eq!(true, filter.contains("key"));
assert_eq!(false, filter.contains("key1"));
// test2
let mut filter2 = BloomFilter::new().set_size(10);
filter2.insert("key");
assert_eq!(true, filter2.contains("key"));
assert_eq!(false, filter2.contains("key1"));

pub fn set_size(self, size: usize) -> Self

Set the bitmap size, the data in the bitmap needs to be empty

example

// test2

let mut filter2 = BloomFilter::new().set_size(10);
filter2.insert("key");
assert_eq!(true, filter2.contains("key"));
assert_eq!(false, filter2.contains("key1"));

pub fn set_hash_loop(self, hash_loop: usize) -> Self

Set the bit occupied by each data

example

// test2

let mut filter2 = BloomFilter::new().set_size(10);
filter2.insert("key");
assert_eq!(true, filter2.contains("key"));
assert_eq!(false, filter2.contains("key1"));

pub fn load_file<P: AsRef<Path>>(
    self,
    filename: P
) -> Result<Self, Box<dyn Error>>

create filter form file

example

let mut filter = BloomFilter::new().load_file("myfilter").unwrap();
filter.insert("key");
filter.debug();

pub fn save_to_file<P: AsRef<Path>>(
    self,
    filename: P
) -> Result<(), Box<dyn Error>>

save filter to file

example

let mut filter = BloomFilter::new();
filter.save_to_file("key").unwrap();
filter.debug();

pub fn insert(&mut self, key: &str)

add key to bloomfilter

example

// test2

let mut filter2 = BloomFilter::new().set_size(10);
filter2.insert("key");
assert_eq!(true, filter2.contains("key"));
assert_eq!(false, filter2.contains("key1"));

pub fn contains(&self, key: &str) -> bool

Check whether the bloomfilter has key

example

// test2

let mut filter2 = BloomFilter::new().set_size(10);
filter2.insert("key");
assert_eq!(true, filter2.contains("key"));
assert_eq!(false, filter2.contains("key1"));

pub fn debug(&self)

Binary print bitmap

example

let mut filter2 = BloomFilter::new().set_size(10);
filter2.insert("key");
assert_eq!(true, filter2.contains("key"));
assert_eq!(false, filter2.contains("key1"));
filter2.debug();
}

pub fn clear(&mut self)

Reset Bitmap