find the length of a map in typescript

To find the number of elements in a Map in TypeScript, you can use the size property or call the size method on the Map. Here's an example:


index.ts
const myMap = new Map();
myMap.set('key1', 'value1');
myMap.set('key2', 'value2');

const mapLength = myMap.size;
console.log(`The length of myMap is ${mapLength}`);
// Output: The length of myMap is 2
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Alternatively, you can also use the Array.from() method to convert the Map to an array and then get the length property of the array:


index.ts
const myMap = new Map();
myMap.set('key1', 'value1');
myMap.set('key2', 'value2');

const mapAsArray = Array.from(myMap);
const mapLength = mapAsArray.length;
console.log(`The length of myMap is ${mapLength}`);
// Output: The length of myMap is 2
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9 lines

Both of these methods will give you the number of elements in the Map.

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