To get the value associated with a key in a map in JavaScript, you can use the get method. This method allows you to access the value directly using the key.
We can get the value associated with a key in a map in JavaScript using the get method, which returns the value associated with the specified key.
For example,
myMap
with some key-value pairs. In this example, the map has string keys and integer values.get
method to access the value associated with the key 'two'
. The get
method returns the value associated with the specified key.value
.console.log
function.const myMap = new Map([
['one', 1],
['two', 2],
['three', 3]
]);
// Get the value associated with a key using get method
const value = myMap.get('two');
// Print the value
console.log(`The value associated with key 'two' is: ${value}`);
The value associated with key 'two' is: 2
We can handle the case where a key is not found in a map in JavaScript using the get method, which returns undefined if the key is not present.
For example,
myMap
with some key-value pairs. In this example, the map has string keys and integer values.get
method to attempt to access the value associated with the key 'four'
. The get
method returns undefined if the key is not found.value
.console.log
function.const myMap = new Map([
['one', 1],
['two', 2],
['three', 3]
]);
// Attempt to get the value associated with a non-existent key
const value = myMap.get('four');
// Print the result
if (value === undefined) {
console.log('Key "four" not found in the map.');
} else {
console.log(`The value associated with key 'four' is: ${value}`);
}
Key "four" not found in the map.
We can get multiple values associated with keys in a map in JavaScript using the get method, which returns the value associated with each key.
For example,
myMap
with some key-value pairs. In this example, the map has string keys and integer values.get
method to access the values associated with the keys 'one'
and 'four'
. The get
method returns the value associated with each key.valueOne
and valueFour
.console.log
function. If a key is not found, the corresponding value will be undefined.const myMap = new Map([
['one', 1],
['two', 2],
['three', 3]
]);
// Get the values associated with keys 'one' and 'four' using get method
const valueOne = myMap.get('one');
const valueFour = myMap.get('four');
// Print the values
console.log(`The value associated with key 'one' is: ${valueOne}`);
console.log(`The value associated with key 'four' is: ${valueFour}`);
The value associated with key 'one' is: 1 The value associated with key 'four' is: undefined
In this tutorial, we learned How to Get the Value Associated with a Key in a Map in JavaScript language with well detailed examples.