Function has_key 

pub fn has_key<K, V>(map: &HashMap<K, V>, key: &K) -> bool
where
    K: Eq + Hash,

Checks if a map contains a specific key.

Arguments

• map - The map to check for the key
• key - The key to check for in the map

Returns

• bool - true if the key is present in the map, false otherwise

Examples

use lowdash::has_key;
use std::collections::HashMap;

let mut map = HashMap::new();
map.insert("a", 1);
map.insert("b", 2);

assert!(has_key(&map, &"a"));
assert!(!has_key(&map, &"c"));