rustHow to create a new Rust HashMap with values?
Creating a new Rust HashMap with values is easy. You can use the collect()
method to create a HashMap from a vector of key-value pairs.
let mut map = vec![("a", 1), ("b", 2), ("c", 3)].into_iter().collect::<HashMap<_, _>>();
This code creates a HashMap with the keys "a"
, "b"
, and "c"
and the corresponding values 1
, 2
, and 3
.
The code consists of the following parts:
let mut map =
: This declares a mutable variablemap
to store the HashMap.vec![("a", 1), ("b", 2), ("c", 3)]
: This creates a vector of key-value pairs..into_iter()
: This converts the vector into an iterator..collect::<HashMap<_, _>>()
: This collects the iterator into a HashMap.
Helpful links
Related
- How to create a Rust HashMap with a string key?
- How to remove an element from a Rust HashMap if a condition is met?
- How to convert a Rust HashMap to JSON?
- How to convert a Rust HashMap to a BTreeMap?
- How to create a HashMap of pointers in Rust?
- How to use a Rust HashMap in a struct?
- How to create a HashMap of HashMaps in Rust?
- How to insert an element into a Rust HashMap if it does not already exist?
- How to use a Rust HashMap in a multithreaded environment?
More of Rust
- How to create a slice from a string in Rust?
- How do I declare a variable with a type in Rust?
- How to match digits with regex in Rust?
- How to use captures_iter with regex in Rust?
- How to convert a u8 slice to a hex string in Rust?
- How to convert Rust bytes to hex?
- How to use regex to match a double quote in Rust?
- How to use the global flag in a Rust regex?
- How to use regex with bytes in Rust?
- How to calculate the inverse of a matrix in Rust?
See more codes...