how to use the flatmapdepth function from the lodash library in typescript

To use the flatMapDepth function from Lodash library in TypeScript, you need to follow these steps:

1. Install the Lodash library by running npm install --save lodash command in your terminal.
2. Import the flatMapDepth function from the Lodash library in your TypeScript file as shown below:

index.ts
import { flatMapDepth } from 'lodash';
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3. You can now use the flatMapDepth function in your code as shown below:

index.ts
const arr = [1, 2, [3, 4, [5, 6]]];
const result = flatMapDepth(arr, (n) => n, 2);

console.log(result); // Output: [1, 2, 3, 4, 5, 6]
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Here, the flatMapDepth function takes two arguments:

• The first argument is the array to flatten.
• The second argument is the function to apply to each element before flattening. In the above example, we are just returning the same element without any modification, but you can provide your own function which will be applied to each element of the array.
• The third argument is the depth to flatten the array. Here, we are flattening the array up to 2 levels.

The output of the above code will be [1, 2, 3, 4, 5, 6] which is a flattened array up to 2 levels.