rustHow to convert a Rust HashMap to a BTreeMap?
To convert a Rust HashMap
to a BTreeMap
, you can use the .into_iter()
method to iterate over the HashMap
and the .collect()
method to collect the elements into a BTreeMap
.
Example code
let mut hashmap = HashMap::new();
hashmap.insert("a", 1);
hashmap.insert("b", 2);
let btreemap: BTreeMap<_, _> = hashmap.into_iter().collect();
Output example
btreemap = {"a": 1, "b": 2}
Code explanation
let mut hashmap = HashMap::new();
: This line creates a new emptyHashMap
calledhashmap
.hashmap.insert("a", 1);
: This line inserts a key-value pair("a", 1)
into theHashMap
.hashmap.insert("b", 2);
: This line inserts a key-value pair("b", 2)
into theHashMap
.let btreemap: BTreeMap<_, _> = hashmap.into_iter().collect();
: This line uses the.into_iter()
method to iterate over theHashMap
and the.collect()
method to collect the elements into aBTreeMap
.
Helpful links
Related
- How to implement PartialEq for a Rust HashMap?
- How to use a tuple as a key in a Rust HashMap?
- How to convert the keys of a Rust HashMap to a vector?
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- How to use a HashBrown with a Rust HashMap?
- How to sort the keys in a Rust HashMap?
- How to use a custom hash function with a Rust HashMap?
- How to create a new Rust HashMap with values?
- How to insert an element into a Rust HashMap if it does not already exist?
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See more codes...