ProgramGuruTo iterate over entries (key-value pairs) in a map in TypeScript, you can use the entries method along with a for...of loop or the forEach method. This allows you to access each key-value pair in the map.
We can iterate over entries in a map in TypeScript using a for...of loop with the entries method, which provides a convenient syntax for iterating over all key-value pairs in the map.
For example,
myMap with some key-value pairs. In this example, the map has string keys and integer values.entries method to get an iterable of the key-value pairs in the map.console.log function to verify that we are iterating over all entries.const myMap = new Map<string, number>([
['one', 1],
['two', 2],
['three', 3]
]);
// Iterate over entries using for...of loop
for (const [key, value] of myMap.entries()) {
console.log(`Key: ${key}, Value: ${value}`);
}Key: one, Value: 1 Key: two, Value: 2 Key: three, Value: 3
We can iterate over entries in a map in TypeScript using the forEach method, which provides a flexible way to access each key-value pair in the map.
For example,
myMap with some key-value pairs. In this example, the map has string keys and integer values.forEach method to iterate over the key-value pairs in the map.forEach, we access each key and value.console.log function to verify that we are iterating over all entries.const myMap = new Map<string, number>([
['one', 1],
['two', 2],
['three', 3]
]);
// Iterate over entries using forEach method
myMap.forEach((value, key) => {
console.log(`Key: ${key}, Value: ${value}`);
});Key: one, Value: 1 Key: two, Value: 2 Key: three, Value: 3
We can store entries in a separate array and then iterate over the array in TypeScript, which provides a way to work with key-value pairs independently of the map.
For example,
myMap with some key-value pairs. In this example, the map has string keys and integer values.entries to store the key-value pairs from the map.entries method to get an iterable of the key-value pairs in the map and spread it into the entries array using the spread operator.entries array and print each key and value to the console using the console.log function to verify that we have stored all entries separately.const myMap = new Map<string, number>([
['one', 1],
['two', 2],
['three', 3]
]);
// Store entries in a separate array
const entries = [...myMap.entries()];
// Iterate over the entries array
for (const [key, value] of entries) {
console.log(`Key: ${key}, Value: ${value}`);
}Key: one, Value: 1 Key: two, Value: 2 Key: three, Value: 3
In this tutorial, we learned How to Iterate Over Entries (Key-Value Pairs) in a Map in TypeScript language with well detailed examples.