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## elsa
[](https://travis-ci.org/Manishearth/elsa)
[](https://crates.io/crates/elsa)
[](#license)
_🎵 Immutability never bothered me anyway 🎶_
This crate provides various "frozen" collections.
These are append-only collections where references to entries can be held on to even across insertions. This is safe because these collections only support storing data that's present behind some indirection -- i.e. `String`, `Vec<T>`, `Box<T>`, etc, and they only yield references to the data behind the allocation (`&str`, `&[T]`, and `&T` respectively)
The typical use case is having a global cache of strings or other data which the rest of the program borrows from.
### Running all examples
```bash
cargo test --examples --features indexmap
```
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