indexed_map

A wrapper for HashMap that maps each value to a uniquely generated usize key.

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Example usage:

```rust use indexed_map::IndexedMap;

fn main() { // create an empty IndexedMap, just like HashMap let mut fruits = IndexedMap::new();

// insert some values and store their keys for later use
let apple = fruits.insert("Apple");
let orange = fruits.insert("Orange");
let pear = fruits.insert("Pear");

// list the values we've inserted
for fruit in fruits.inner().values() {
    println!("{}", fruit);
}

// remove the values using the unique keys returned from `IndexedMap::insert`
fruits.inner_mut().remove(&apple);
fruits.inner_mut().remove(&orange);
fruits.inner_mut().remove(&pear);

// the map is now empty
println!("{:?}", fruits);

} ```