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

To use the thru function from the lodash library in typescript, you first need to install the lodash library by running the command npm install --save lodash in your terminal.

Next, you can import the thru function from the lodash library at the top of your typescript file using the import statement:

index.ts
import { thru } from 'lodash';
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The thru function from lodash is a utility function that allows you to chain several functions together in a single expression.

To use this function, you simply pass the value you want to operate on as the first argument to the thru function, and then chain any additional functions you want to apply to that value.

Here is an example of how you might use the thru function in a typescript file:

index.ts
import { thru } from 'lodash';

const result = thru([1, 2, 3], (array) => array.map((num) => num * 2))
  .filter((num) => num > 4)
  .map((num) => num.toString())
  .value();

console.log(result); // Output: ['6']
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In this example, we first pass an array of numbers [1, 2, 3] as the first argument to the thru function. We then chain two additional functions using the filter and map methods to filter out any numbers less than or equal to 4 and then convert the remaining number to a string.

Finally, we call the value method to execute the entire chain of functions and return the resulting value, which is an array containing a single string element '6'.