To convert a map to an array of key-value pairs in JavaScript, you can use the entries() method to get an iterator of key-value pairs and then convert it to an array using the Array.from() method. This provides a convenient way to extract all key-value pairs from the map.
We can convert a map to an array of key-value pairs in JavaScript using the entries() method, which provides an iterator of all key-value pairs in the map. We can then convert this iterator to an array using the Array.from() method.
For example,
myMap
with some key-value pairs. In this example, the map has string keys and integer values.entries
method to get an iterator of the key-value pairs in the map.Array.from
method.entriesArray
.console.log
function to verify the conversion.const myMap = new Map([
['one', 1],
['two', 2],
['three', 3]
]);
// Convert map to an array of key-value pairs
const entriesArray = Array.from(myMap.entries());
// Print the key-value pairs
console.log('Key-Value Pairs:', entriesArray);
Key-Value Pairs: [['one', 1], ['two', 2], ['three', 3]]
We can also convert an empty map to an array of key-value pairs in JavaScript using the entries() method, which returns an empty array when the map is empty.
For example,
emptyMap
with string keys and integer values.entries
method to get an iterator of the key-value pairs in the empty map.Array.from
method.emptyEntriesArray
.console.log
function to verify that the array is empty.const emptyMap = new Map();
// Convert empty map to an array of key-value pairs
const emptyEntriesArray = Array.from(emptyMap.entries());
// Print the key-value pairs
console.log('Key-Value Pairs:', emptyEntriesArray);
Key-Value Pairs: []
We can convert a map to an array of key-value pairs in JavaScript after adding elements using the entries() method, which provides an updated iterator of all key-value pairs in the map.
For example,
dynamicMap
with string keys and integer values.set
method.entries
method to get an iterator of the key-value pairs in the map after adding elements.Array.from
method.dynamicEntriesArray
.console.log
function to verify the updated list of key-value pairs.const dynamicMap = new Map();
// Add elements to the map
dynamicMap.set('one', 1);
dynamicMap.set('two', 2);
dynamicMap.set('three', 3);
// Convert map to an array of key-value pairs
const dynamicEntriesArray = Array.from(dynamicMap.entries());
// Print the key-value pairs
console.log('Key-Value Pairs:', dynamicEntriesArray);
Key-Value Pairs: [['one', 1], ['two', 2], ['three', 3]]
In this tutorial, we learned How to Convert a Map to an Array of Key-Value Pairs in JavaScript language with well detailed examples.