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# zerotrie [](https://crates.io/crates/zerotrie)
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A data structure offering zero-copy storage and retrieval of byte strings, with a focus
on the efficient storage of ASCII strings. Strings are mapped to `usize` values.
[`ZeroTrie`] does not support mutation because doing so would require recomputing the entire
data structure. Instead, it supports conversion to and from [`LiteMap`] and [`BTreeMap`].
There are multiple variants of [`ZeroTrie`] optimized for different use cases.
## Examples
```rust
use zerotrie::ZeroTrie;
let data: &[(&str, usize)] = &[("abc",
11), ("xyz",
22), ("axyb",
33)];
let trie: ZeroTrie<Vec<u8>> = data.iter().copied().collect();
assert_eq!(trie.get("axyb"), Some(
33));
assert_eq!(trie.byte_len(),
18);
```
## Internal Structure
To read about the internal structure of [`ZeroTrie`], build the docs with private modules:
```bash
cargo doc --document-private-items --all-features --no-deps --open
```
[`LiteMap`]: litemap::LiteMap
[`BTreeMap`]: alloc::collections::BTreeMap
<!-- cargo-rdme end -->
## More Information
For more information on development, authorship, contributing etc. please visit [`ICU4X hom
e page`](https://github.com/unicode-org/icu4x).