rustHow to implement PartialEq for a Rust HashMap?
To implement PartialEq
for a Rust HashMap
, you can use the eq
method provided by the HashMap
type. This method takes two HashMap
s as arguments and returns true
if they contain the same key-value pairs.
Example code
use std::collections::HashMap;
let mut map1 = HashMap::new();
map1.insert("a", 1);
map1.insert("b", 2);
let mut map2 = HashMap::new();
map2.insert("a", 1);
map2.insert("b", 2);
assert!(map1.eq(&map2));
Output example
assertion successful
Code explanation
-
use std::collections::HashMap;
: imports theHashMap
type from thestd::collections
module. -
let mut map1 = HashMap::new();
: creates a newHashMap
calledmap1
. -
map1.insert("a", 1);
: inserts a key-value pair intomap1
, with the key being"a"
and the value being1
. -
let mut map2 = HashMap::new();
: creates a newHashMap
calledmap2
. -
map2.insert("a", 1);
: inserts a key-value pair intomap2
, with the key being"a"
and the value being1
. -
assert!(map1.eq(&map2));
: uses theeq
method to comparemap1
andmap2
and returnstrue
if they contain the same key-value pairs.
Helpful links
Related
- How to convert the keys of a Rust HashMap to a vector?
- How to convert a Rust HashMap to a JSON string?
- How to use an enum in a Rust HashMap?
- How to sort a Rust HashMap?
- How to convert a Rust HashMap to JSON?
- How to remove an element from a Rust HashMap if a condition is met?
- 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 create a nested HashMap in Rust?
More of Rust
- How to get a capture group using Rust regex?
- How to use regex with bytes in Rust?
- How to match a URL with a regex in Rust?
- How to replace a capture group using Rust regex?
- How to use Unicode in a regex in Rust?
- How to get all matches from a Rust regex?
- How to match a string with regex in Rust?
- How to use regex to match a group in Rust?
- How to use regex to match a double quote in Rust?
- How to calculate the inverse of a matrix in Rust?
See more codes...