rustHow to compare two Rust HashMaps?
Comparing two Rust HashMaps can be done using the eq
method. This method takes two HashMap
s as arguments and returns true
if they contain the same key-value pairs.
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
: This imports theHashMap
type from thestd::collections
module. -
let mut map1 = HashMap::new()
: This creates a new emptyHashMap
calledmap1
. -
map1.insert("a", 1)
: This inserts a key-value pair intomap1
, with the key being"a"
and the value being1
. -
map2.insert("a", 1)
: This inserts a key-value pair intomap2
, with the key being"a"
and the value being1
. -
assert!(map1.eq(&map2))
: This uses theeq
method to comparemap1
andmap2
. If they contain the same key-value pairs, it will returntrue
.
Helpful links
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