rustHow to remove an element from a Rust HashMap if a condition is met?
Removing an element from a Rust HashMap if a condition is met can be done using the remove_entry
method. This method takes a closure as an argument, which is used to determine if the element should be removed.
Example code
let mut map = HashMap::new();
map.insert("a", 1);
map.insert("b", 2);
map.insert("c", 3);
map.remove_entry(|key, value| *value == 2);
Output example
()
Code explanation
let mut map = HashMap::new();
: creates a new empty HashMapmap.insert("a", 1);
: inserts a key-value pair into the HashMapmap.remove_entry(|key, value| *value == 2);
: removes an entry from the HashMap if the closure returns true
Helpful links
Related
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- How to convert a Rust HashMap to a JSON string?
- How to print a Rust HashMap?
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