split a map into two maps in javascript

To split a map into two maps in javascript, we can use the Array.from() method to convert the map into an array of key-value pairs, split the array into two smaller arrays, and then convert each array back into a map using the Map() constructor.

Here's an example code snippet:

index.tsx
// create a map
let originalMap = new Map([
  ['key1', 'value1'],
  ['key2', 'value2'],
  ['key3', 'value3'],
]);

// convert the map into an array and split it into two arrays
let mapArray = Array.from(originalMap);
let mapArray1 = mapArray.slice(0, mapArray.length / 2);
let mapArray2 = mapArray.slice(mapArray.length / 2);

// convert the two arrays back into maps
let map1 = new Map(mapArray1);
let map2 = new Map(mapArray2);

console.log(map1); // Map { 'key1' => 'value1' }
console.log(map2); // Map { 'key2' => 'value2', 'key3' => 'value3' }
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In this example, we first create an original map with three key-value pairs. We then convert the original map into an array using the Array.from() method.

We split the array into two smaller arrays using the slice() method. The slice() method returns a portion of an array based on the starting index and the ending index.

We then create two new maps from the two smaller arrays using the Map() constructor.

Finally, we log the two new maps to the console to verify that the splitting process worked correctly.