posts: bloom-filter: add insertion

This commit is contained in:
Bruno BELANYI 2024-07-14 17:55:33 +01:00
parent 84ce6ea494
commit 114ca1de50

View file

@ -62,3 +62,18 @@ class BloomFilter[T]:
self._bits = 0
self._hash_functions = hash_functions
```
### Inserting a key
To add an element to the filter, we take the output from each hash function and
use that to set a bit in the filter. This combination of bit will identify the
element, which we can use for lookup later.
```python
def insert(self, val: T) -> None:
# Iterate over each hash
for f in self._hash_functions:
n = f(val) % BIT_COUNT
# Set the corresponding bit
self._bit |= 1 << n
```